
Archives sédimentaires des
paléoclimats précambriens
galen.halverson [at] mcgill.ca (galen[dot]halverson[at]mcgill[dot]ca)
I am a stratigrapher, sedimentologist, and isotope geochemist. These specializations, within the broad domain of Earth sciences, allow me to interrogate the stratigraphic record using multiple tools, which I employ to infer tectonic, geographic, and environmental information about the ancient Earth. My research is strongly field-based, with field areas that include northern Canada, Svalbard, the Arabian Peninsula, southwestern Africa, and central Australia. This fieldwork takes my research group to remote and evocative locations and provides both the geological context and the rock samples that drive collaborative, interdisciplinary research with paleobiologists, geochronologists, biogeochemists, climate modellers, and other specialists. This research is aimed principally at understanding Earth system evolution during the Proterozoic Eon, which spanned from 2.5 to 0.54 billion years ago— almost half of Earth’s history. This vast interval of time began with the Great Oxidation Event, when oxygen first accumulated in the atmosphere, spanned the origin of eukaryotes, and concluded when the earliest animals first diversified and colonized the seafloor. Recent topics of enquiry include the timing and environment of early eukaryotic evolution, tectonic setting and geodynamic implications of Proterozoic intracratonic basins, Proterozoic sequence stratigraphy, calibration of the Geologic Time Scale, and application of iron isotope and rare Earth element geochemistry to interpreting redox evolution of the oceans. This research increasingly incorporates astrochronology and probabilistic approaches, including Bayesian inference, in generating stratigraphic age models.
Davoudi, V., Khodabakhsh, S., Halverson, G., Bahramabadi, B., Bui, T. H., 2023. Quaternary calcretes of Qazvin Plain (N Iran) based on multi-story geochemical and petrographic signatures. Arabian Journal of Geosciences 16(9), 513.
Dufour, F., Davies, J. H., Greenman, J. W., Skulski, T., Halverson, G. P., Stevenson, R., 2023. New U-Pb CA-ID TIMS zircon ages implicate the Franklin LIP as the proximal trigger for the Sturtian Snowball Earth event. Earth and Planetary Science Letters 618, 118259.
Greenman, J. W., dos Santos, A., Patzke, M., Gibson, T. M., Ielpi, A., Halverson, G. P., 2023. A tectonostratigraphic framework for the late Mesoproterozoic Bylot basins of Laurentia. Journal of the Geological Society 180(3), jgs2022-174.
Mahmoudi, N., Steen, A. D., Halverson, G. P., Konhauser, K. O., 2023. Biogeochemistry of Earth before exoenzymes. Nature Geoscience 16, 845-850.
Spiering, B. R., Bissick, A., Darroch, S. A., Davies, J. H., Gibson, B. M., Halverson, G. P. et al., 2023. Initial cyclostratigraphy of the middle Nama Group (Schwarzrand Subgroup) in southern Namibia. Precambrian Research 397, 107200.
Zhang, T., Keller, C. B., Hoggard, M. J., Rooney, A. D., Halverson, G. P., Bergmann, K. D. et al., 2023. A Bayesian framework for subsidence modeling in sedimentary basins: A case study of the Tonian Akademikerbreen Group of Svalbard, Norway. Earth and Planetary Science Letters 620, 118317.
Dang, D.H., Wang, W., Gibson, T.M., Kunzmann, M., Andersen, M., Halverson, G.P., Evans, R.D., 2022. Authigenic uranium isotopes of late Proterozoic black shale. Chemical Geology 588, 120644.
Halverson, G.P., Shen, C., Davies, J.H.F.L., Wu, L., 2022. A Bayesian Approach to Inferring Depositional Ages Applied to a Late Tonian Reference Section in Svalbard. Frontiers in Earth Science 10, 798739.
Kunzmann, M., Crombez, V., Blaikie, T. N., Catuneanu, O., King, R., Halverson, G. P., Schmid, S., Spinks, S. C., 2022. Sequence stratigraphy of the ca 1640 Ma Barney Creek Formation, McArthur Basin, Australia. Australian Journal of Earth Sciences.
Maloney, K.M., Schiffbauer, J.D., Halverson, G.P., Xiao, S., Laflamme, M., 2022. Preservation of early Tonian macroalgal fossils from the Dolores Creek Formation, Yukon. Scientific Reports 12(1), 6222.
Millikin, A.E., Strauss, J.V., Halverson, G.P., Bergmann, K.D., Tosca, N.J., Rooney, A.D., 2022. Calibrating the Russøya excursion in Svalbard, Norway, and implications for Neoproterozoic chronology. Geology 50(4), 506-510.
Shen, C., Schmitz, M., Johnson, P., Davies, J.H., Halverson, G.P., 2022. U-Pb geochronology and cyclostratigraphy of the middle Ediacaran upper Jibalah Group, eastern Arabian Shield. Precambrian Research 375, 106674.
Wang, C., Lechte, M.A., Reinhard, C.T., Asael, D., Cole, D.B., Halverson, G.P., Porter, S.M., Galili, N., Halevy, I., Rainbird, R.H., Lyons, T.W., 2022. Strong evidence for a weakly oxygenated ocean–atmosphere system during the Proterozoic. Proceedings of the National Academy of Sciences 119(6), e2116101119.
Wu, L., Huang, W., Liang, H., Murphy, J.B., Kirscher, U., Mitchell, R.N., Hawkins, L.M.A., Halverson, G.P., Gu, Y.J., Zhang, J., Liu, X., 2022. Reply to comment on “Paleomagnetism of the Guanyang Devonian sedimentary successions in Guangxi province, South China”. Gondwana Research 107, 59-62.
Chen, X., Tissot, F.L.H., Jansen, M.F., Bekker, A., Liu, C.X., Nie, N.X., Halverson, G.P., Veizer, J., Dauphas, N., 2021. The Uranium Isotopic Record of Shales and Carbonates Through Geologic Time. Geochimica et Cosmochimica Acta 300, 164-191.
Crockford, P.W., Kunzmann, M., Blättler, C.L., Kalderon-Asael, B., Murphy, J.G., Ahm, A.S., Sharoni, S., Halverson, G.P., Planavsky, N.J., Halevy, I., Higgins, J.A., 2021. Reconstructing Neoproterozoic seawater chemistry from early diagenetic dolomite. Geology 49(4), 442-446.
Farrell, Ú.C., Samawi, R., Anjanappa, S., Klykov, R., Adeboye, O.O., Agic, H., Ahm, A.S.C., Boag, T.H., Bowyer, F., Brocks, J.J., Brunoir, T.N. et al., 2021. The Sedimentary Geochemistry and Paleoenvironments Project. Geobiology 19(6) 545-556.
Greenman, J.W., Rooney, A.D., Patzke, M., Ielpi, A., Halverson, G.P., 2021. Re-Os geochronology highlights widespread latest Mesoproterozoic (ca. 1090–1050 Ma) cratonic basin development on northern Laurentia. Geology 49(7), 779-783.
Hall, P.A., McKirdy, D.M., Halverson, G.P., Jago, J.B., Collins, A.S., 2021. Biogeochemical status of the Paleo-Pacific Ocean: clues from the early Cambrian of South Australia. Australian Journal of Earth Sciences 68(7), 968-991.
Hoffman, P.F., Halverson, G.P., Schrag, D.P., Higgins, J.A., Domack, E.W., Macdonald, F.A., Pruss, S.B., Blättler, C.L., Crockford, P.W., Hodgin, E.B., Bellefroid, E.J., 2021. Snowballs in Africa: Sectioning a long-lived Neoproterozoic carbonate platform and its bathyal foreslope (NW Namibia). Earth-Science Reviews 219, 103616.
Loron, C.C., Halverson, G.P., Rainbird, R.H., Skulski, T., Turner, E.C., Javaux, E.J., 2021. Shale-hosted biota from the Dismal Lakes Group in Arctic Canada supports an early Mesoproterozoic diversification of eukaryotes. Journal of Paleontology 95(6), 1113-1137.
Maloney, K.M., Halverson, G.P., Schiffbauer, J.D., Xiao, S., Gibson, T.M., Lechte, M.A., Cumming, V.M., Millikin, A.E., Murphy, J.G., Wallace, M.W., Selby, D., 2021. New multicellular marine macroalgae from the early Tonian of northwestern Canada. Geology 49(6), 743-747.
Patzke, M., Greenman, J.W., Halverson, G.P., Ielpi, A., 2021. The initiation of the Mesoproterozoic Bylot basins (Nunavut, Arctic Canada) as recorded in the Nyeboe Formation, Fury and Hecla Group. Journal of Sedimentary Research 91(11), 1166-1187.
Wu, L., Huang, W., Liang, H., Murphy, J.B., Kirscher, U., Mitchell, R.N., Hawkins, L.M., Halverson, G.P., Gu, Y.J., Zhang, J., Liu, X., 2021. Paleomagnetism of the Guanyang Devonian sedimentary successions in Guangxi province, South China. Gondwana Research 105, 143-159.
Dufour, F., Stevenson, R., Halverson, G.P., 2020. Timing of emplacement of mafic rocks of the Fury and Hecla Group and younger mafic intrusions, northwestern Baffin Island, Nunavut. In Summary of Activities 2019, Canada-Nunavut Geoscience Office, 27–36.
Gibson, T.M., Kunzmann, M., Poirier, A., Schumann, D., Tosca, N.J., Halverson, G.P., 2020. Geochemical signatures of transgressive shale intervals from the 811 Ma Fifteenmile Group in Yukon, Canada: Disentangling sedimentary redox cycling from weathering alteration. Geochimica et Cosmochimica Acta 280, 161-184.
Greenman, J.W., Patzke, M., Halverson, G.P., Ielpi, A. 2020. Updated stratigraphy of the Fury and Hecla Group of Melville Peninsula and northwestern Baffin Island, Nunavut. In Summary of Activities 2019, Canada-Nunavut Geoscience Office, 37–50.
Hodgskiss, M.S.W., Lamothe, K.G., Halverson, G., Sperling, E.A., 2020. Extending the record of the Lomagundi-Jatuli carbon isotope excursion in the Labrador Trough, Canada. Canadian Journal of Earth Sciences 57(9), 1089-1102.
Hodgskiss, M.S., Sansjofre, P., Kunzmann, M., Sperling, E.A., Cole, D.B., Crockford, P.W., Gibson, T.M., Halverson, G.P., 2020. A high-TOC shale in a low productivity world: The late Mesoproterozoic Arctic Bay Formation, Nunavut. Earth and Planetary Science Letters 544, 116384.
Woltz, C.R., Porter, S.M., Agić, H., Dehler, C.M., Junium, C.K., Riedman, L.A., Hodgskiss, M.S.W., Wörndle, S., Halverson, G.P., 2020. Total organic carbon and the preservation of organic-walled microfossils in Precambrian shale. Geology 49(5), 556–560.
Crockford, P.W., Kunzmann, M., Bekker, A., Hayles, J., Bao, H., Halverson, G.P., Peng, Y., Bui, T.H., Cox, G.M., Gibson, T.M., Wörndle, S., Rainbird, R., Lepland, A., Swanson-Hysell, N.L., Master, S., Sreenivas, B., Kuznetsov, A., Krupenik, V., Wing, B., 2019. Claypool continued: Extending the isotopic record of sedimentary sulfate. Chemical Geology 513, 200-225.
Crockford, P.W., Wing, B.A., Paytan, A., Hodgskiss, M.S., Mayfield, K.K., Hayles, J.A., Middleton, J.E., Ahm, A.S.C., Johnston, D.T., Caxito, F., Uhlein, G., Halverson, G.P., Eickmann, B., Torres, M., Horner, T.J., 2019. Barium-isotopic constraints on the origin of post-Marinoan barites. Earth and Planetary Science Letters 519, 234-244.
Gibson, T.M., Wörndle, S., Crockford, P.W., Bui, T.H., Creaser, R.A., Halverson, G.P., 2019. Radiogenic isotope chemostratigraphy reveals marine and nonmarine depositional environments in the late Mesoproterozoic Borden Basin, Arctic Canada. Geological Society of America Bulletin 131(11-12), 1965-1978.
Hodgskiss, M.S., Dagnaud, O.M., Frost, J.L., Halverson, G.P., Schmitz, M.D., Swanson-Hysell, N.L., Sperling, E.A., 2019. New insights on the Orosirian carbon cycle, early Cyanobacteria, and the assembly of Laurentia from the Paleoproterozoic Belcher Group. Earth and Planetary Science Letters 520, 141-152.
Khodabakhsh, S., Mohseni, H., Abbassi, N., Halverson, G., Hao Bui, T., 2019. Microfacies, geochemical characters and possible mechanism of rhythmic deposition of the Pabdeh Formation in SE Ilam (SW Iran). Geopersia 9(1), 89-109.
Kunzmann, M., Schmid, S., Blaikie, T.N., Halverson, G.P., 2019. Facies analysis, sequence stratigraphy, and carbon isotope chemostratigraphy of a classic Zn-Pb host succession: the Proterozoic middle McArthur Group, McArthur Basin, Australia. Ore Geology Reviews 106, 150-175.
Lamothe, K.G., Hoffman, P.F., Greenman, J.W., Halverson, G.P., 2019. Stratigraphy and Isotope Geochemistry of the pre-Sturtian Ugab Subgroup, Otavi/Swakop Group, northwestern Namibia. Precambrian Research 332, 105387.
Lechte, M.A., Wallace, M.W., van Smeerdijk Hood, A., Li, W., Jiang, G., Halverson, G.P., Asael, D., McColl, S.L., Planavsky, N.J., 2019. Subglacial meltwater supported aerobic marine habitats during Snowball Earth. Proceedings of the National Academy of Sciences 116(51), 25478-25483.
Zi, J.W., Haines, P.W., Wang, X.C., Jourdan, F., Rasmussen, B., Halverson, G.P., Sheppard, S., Li, C.F., 2019. Pyroxene 40Ar/39Ar dating of basalt and applications to large igneous provinces and Precambrian stratigraphic correlations. Journal of Geophysical Research: Solid Earth 124(8), 8313-8330.
Cox, G.M., Halverson, G.P., Denyszyn, S., Foden, J., Macdonald, F.A., 2018. Cryogenian magmatism along the north-western margin of Laurentia: Plume or rift? Precambrian Research 319, 144-157.
Crockford, P.W., Hayles, J.A., Bao, H., Planavsky, N.J., Bekker, A., Fralick, P.W., Halverson, G.P., Bui, T.H., Peng, Y., Wing, B.A., 2018. Triple oxygen isotope evidence for limited mid-Proterozoic primary productivity. Nature 559 (7715), 613-616.
Crockford, P.W., Hodgskiss, M.S.W., Uhlein, G.J., Caxito, F., Hayles, J.A., Halverson, G.P., 2018. Linking paleocontinents through triple oxygen isotope anomalies. Geology 46 (2), 179-182. DOI: 10.1130/G39470.1
Gibson, T.M., Shih, P.M., Cumming, V.M., Fischer, W.W., Crockford, P.W., Hodgskiss, M.S.W., Wörndle, S., Creaser, R.A., Rainbird, R.H., Skulski, T.M., Halverson, G.P., 2018. Precise age of Bangiomorpha pubescens dates the origin of eukaryotic photosynthesis. Geology 46 (2), 135-138. DOI: 10.1130/G39829.1
Greenman, J.W., Patzke, M., Halverson, G.P., Ielpi, A., 2018. Refinement of the stratigraphy of the late Mesoproterozoic Fury and Hecla Basin, Baffin Island, Nunavut, with a specific focus on the Agu Bay and Autridge formations. In Summary of Activities 2018, CanadaNunavut Geoscience Office, 85–96.
Halverson, G.P., Kunzmann, M., Strauss, J.V. and Maloof, A.C., 2018. The Tonian–Cryogenian Transition in Northeastern Svalbard. Precambrian Research 319, 79-95. DOI: 10.1016/j.precamres.2017.12.010
Halverson, G.P., Porter, S.M., Gibson, T.M., 2018. Dating the late Proterozoic stratigraphic record. Emerging Topics in Life Sciences 2(2), 137-147.
Hodgskiss, M.S.W., Kunzmann, M., Poirier, A., Halverson, G.P., 2018. The role of microbial iron reduction in the formation of Proterozoic molar tooth structures. Earth and Planetary Science Letters 482, 1-11.
Hoffman, P.F., Halverson, G.P., 2018. Discussion of “Depositional ages and provenance of the Neoproterozoic Damara Supergroup (northwest Namibia): Implications for the Angola–Congo and Kalahari cratons connection” by Débora B. Nascimento, Renata S. Schmitt, André Ribeiro, Rudolph AJ Trouw, Cees W. Passchier, and Miguel AS Basei. Gondwana Research 58, 235-238.
Macdonald, F.A., Schmitz, M.D., Strauss, J.V., Halverson, G.P., Gibson, T.M., Eyster, A., Cox, G., Mamrol, P., Crowley, J.L., 2018. Cryogenian of Yukon. Precambrian Research 319, 114-143.
Patzke, M., Greenman, J.W., Ielpi, A., Halverson, G.P., 2018. Sedimentology of the sandstone-dominated units in the Fury and Hecla Basin, northern Baffin Island, Nunavut. In Summary of Activities 2018, Canada-Nunavut Geoscience Office, 75–84.
Shields, G.A., Halverson, G.P. and Porter, S.M., 2018. Descent into the Cryogenian. Precambrian Research 319, 1-5.
Steenkamp, H.M., Bovingdon, P.J., Dufour, F., Généreux, C.-A., Greenman, J.W., Halverson, G.P., Ielpi, A., Patzke, M., Tinkham, D.K., 2018. New regional mapping of Precambrian rocks north of Fury and Hecla Strait, northwestern Baffin Island, Nunavut. In Summary of Activities 2018, Canada-Nunavut Geoscience Office, 47–62.
Barr, C., Tibby, J., Moss, P.T., Halverson, G.P., Marshall, J.C., McGregor, G.B., Stirling, E., 2017. A 25,000-year record of environmental change from Welsby Lagoon, North Stradbroke Island, in the Australian subtropics. Quaternary International 449, 106-118.
Elsworth, G., Galbraith, E., Halverson, G., Yang, S., 2017. Enhanced weathering and CO2 drawdown caused by latest Eocene strengthening of the Atlantic meridional overturning circulation. Nature Geoscience 10 (3), 213-216.
Eyster, A.E., Fu, R.R., Strauss, J.V., Weiss, B.P., Roots, C.F., Halverson, G.P., Evans, D.A., Macdonald, F.A., 2017. Paleomagnetic evidence for a large rotation of the Yukon block relative to Laurentia: Implications for a low-latitude Sturtian glaciation and the breakup of Rodinia. Bulletin of the Geological Society of America 129 (1-2), 38-58.
Goddéris, Y., Le Hir, G., Macouin, M., Donnadieu, Y., Hubert-Théou, L., Dera, G., Aretz, M., Fluteau, F., Li, Z.X., Halverson, G.P., 2017. Paleogeographic forcing of the strontium isotopic cycle in the Neoproterozoic. Gondwana Research 42, 151-162.
Halverson, G.P., 2017. Introducing the Xenoconformity. Geology 45 (7), 671-672.
Hoffman, P.F., Abbot, D.S., Ashkenazy, Y., Benn, D.I., Brocks, J.J., Cohen, P.A., Cox, G.M., Creveling, J.R., Donnadieu, Y., Erwin, D.H., Fairchild, I.J., Ferreira, D., Goodman, J.C., Halverson, G.P., Jansen, M.F., Le Hir, G., Love, G.D., Macdonald, F.A, Maloof, A.C., Partin, C.A., Ramstein, G., Rose, B.E.J., Rose, C.V., Sadler, P.M., Tziperman, E., Voigt, A. and Warren, S.G., 2017. Snowball Earth climate dynamics and Cryogenian geology-geobiology. Science Advances 3 (11), p.e1600983.
Hoffman, P.F., Lamothe, K.G., LoBianco, S.J.C., Hodgskiss, M.S.W., Bellefroid, E.J., Johnson, B.W., Hodgin, E.B., Halverson, G.P., 2017. Sedimentary depocenters on Snowball Earth: Case studies from the Sturtian Chuos formation in Northern Namibia. Geosphere 13 (3), 811-837.
Kunzmann, M., Bui, T.H., Crockford, P.W., Halverson, G.P., Scott, C., Lyons, T.W., Wing, B.A., 2017. Bacterial sulfur disproportionation constrains timing of neoproterozoic oxygenation. Geology 45 (3), 207-210.
Kunzmann, M., Gibson, T.M., Halverson, G.P., Hodgskiss, M.S.W., Bui, T.H., Carozza, D.A., Sperling, E.A., Poirier, A., Cox, G.M., Wing, B.A., 2017. Iron isotope biogeochemistry of Neoproterozoic marine shales. Geochimica et Cosmochimica Acta 209, 85-105.
Mendes, M., Lobato, L.M., Kunzmann, M., Halverson, G.P., Rosière, C.A., 2017. Iron isotope and REE+Y composition of the Cauê banded iron formation and related iron ores of the Quadrilátero Ferrífero, Brazil. Mineralium Deposita 52 (2), 159-180.
Miller, A.J., Strauss, J.V., Halverson, G.P., Macdonald, F.A., Johnston, D.T., Sperling, E.A., 2017. Tracking the onset of Phanerozoic-style redox-sensitive trace metal enrichments: New results from basal Ediacaran post-glacial strata in NW Canada. Chemical Geology 457, 24-37.
Uhlein, G.J., Uhlein, A., Stevenson, R., Halverson, G.P., Caxito, F.A., Cox, G.M., 2017. Early to late Ediacaran conglomeratic wedges from a complete foreland basin cycle in the southwest São Francisco Craton, Bambuí Group, Brazil. Precambrian Research299, 101-116.
Ader, M., Thomazo, C., Sansjofre, P., Busigny, V., Papineau, D., Laffont, R., Cartigny, P., Halverson, G.P., 2016. Interpretation of the nitrogen isotopic composition of Precambrian sedimentary rocks: Assumptions and perspectives. Chemical Geology 429, 93-110.
Angerer, T., Hagemann, S.G., Walde, D.H.G., Halverson, G.P., Boyce, A.J., 2016. Multiple metal sources in the glaciomarine facies of the Neoproterozoic Jacadigo iron formation in the "Santa Cruz deposit", Corumbá, Brazil. Precambrian Research 275, 369-393.
Cole, D.B., Reinhard, C.T., Wang, X., Gueguen, B., Halverson, G.P., Gibson, T., Hodgskiss, M.S.W., Ryan McKenzie, N., Lyons, T.W., Planavsky, N.J., 2016. A shale-hosted Cr isotope record of low atmospheric oxygen during the Proterozoic. Geology 44 (7), 555-558.
Cox, G.M., Halverson, G.P., Stevenson, R.K., Vokatya, M., Poirier, A., Kunzmann, M., Li, Z.-X., Denyszyn, S.W., Strausse, J.V., Macdonald, F.A., 2016. Continental flood basalt weathering as a trigger for Neoproterozoic Snowball Earth. Earth and Planetary Science Letters 446, 89-99.
Crockford, P.W., Cowie, B.R., Johnston, D.T., Hoffman, P.F., Sugiyama, I., Pellerin, A., Bui, T.H., Hayles, J., Halverson, G.P., Macdonald, F.A., Wing, B.A., 2016. Triple oxygen and multiple sulfur isotope constraints on the evolution of the post-Marinoan sulfur cycle. Earth and Planetary Science Letters 435, 74-83.
Denyszyn, S., Cox, G., Halverson, G., 2016. Geochemistry and Geochronology of Circumferential Dykes of the Franklin LIP: A Rotated Perspective on Plate Reconstruction. Acta Geologica Sinica 90, 30.
Fairchild, I.J., Bonnand, P., Davies, T., Fleming, E.J., Grassineau, N., Halverson, G.P., Hambrey, M.J., McMillan, E.M., McKay, E., Parkinson, I.J., Stevenson, C.T.E., 2016. The Late Cryogenian Warm Interval, NE Svalbard: Chemostratigraphy and genesis. Precambrian Research 281, 128-154.
Hoffman, P.F., Bellefroid, E.J., Johnson, B.W., Hodgskiss, M.S.W., Schrag, D.P., Halverson, G.P., 2016. Early extensional detachments in a contractional orogen: Coherent, map-scale, submarine slides (mass transport complexes) on the outer slope of an Ediacaran Collisional Foredeep, Eastern Kaoko Belt, Namibia. Canadian Journal of Earth Sciences 53 (11), 1177-1189.
Shields-Zhou, G.A., Porter, S., Halverson, G.P., 2016. A new rock-based definition for the Cryogenian Period (circa 720 - 635 Ma). Episodes 39 (1), 3-8.
Collins, A.S., Patranabis-Deb, S., Alexander, E., Bertram, C.N., Falster, G.M., Gore, R.J., Mackintosh, J., Dhang, P.C., Saha, D., Payne, J.L., Jourdan, F., Backé, G., Halverson, G.P., Wade, B.P., 2015. Detrital mineral age, radiogenic isotopic stratigraphy and tectonic significance of the Cuddapah Basin, India. Gondwana Research 28 (4), 1294-1309.
Condon, D.J., Boggiani, P., Fike, D., Halverson, G.P., Kasemann, S., Knoll, A.H., Macdonald, F.A., Prave, A.R., Zhu, M., 2015. Accelerating Neoproterozoic research through scientific drilling. Scientific Drilling 19, 17-25.
Cox, G.M., Halverson, G.P., Poirier, A., Le Heron, D., Strauss, J.V., Stevenson, R., 2016. A model for Cryogenian iron formation. Earth and Planetary Science Letters 433, 280-292.
Cox, G.M., Strauss, J.V., Halverson, G.P., Schmitz, M.D., McClelland, W.C., Stevenson, R.S., Macdonald, F.A., 2015. Kikiktat volcanics of Arctic Alaska-Melting of harzburgitic mantle associated with the Franklin large igneous province. Lithosphere 7 (3), 275-295.
Kunzmann, M., Halverson, G.P., Scott, C., Minarik, W.G., Wing, B.A., 2015. Geochemistry of Neoproterozoic black shales from Svalbard: Implications for oceanic redox conditions spanning Cryogenian glaciations. Chemical Geology 417, 383-393.
Lee, C., Love, G.D., Fischer, W.W., Grotzinger, J.P., Halverson, G.P., 2015. Marine organic matter cycling during the Ediacaran Shuram excursion. Geology 43 (12), 1103-1106.
Sossi, P.A., Halverson, G.P., Nebel, O., Eggins, S.M., 2015. Combined separation of Cu, Fe and Zn from rock matrices and improved analytical protocols for stable isotope determination. Geostandards and Geoanalytical Research 39 (2), 129-149.
Sperling, E.A., Wolock, C.J., Morgan, A.S., Gill, B.C., Kunzmann, M., Halverson, G.P., Macdonald, F.A., Knoll, A.H., Johnston, D.T., 2015. Statistical analysis of iron geochemical data suggests limited late Proterozoic oxygenation. Nature 523 (7561), 451-454.
Strauss, J.V., MacDonald, F.A., Halverson, G.P., Tosca, N.J., Schrag, D.P., Knoll, A.H., 2015. Stratigraphic evolution of the neoproterozoic callison lake formation: Linking the break-up of rodinia to the islay carbon isotope excursion. American Journal of Science 315 (10), 881-944.
Ader, M., Sansjofre, P., Halverson, G.P., Trindade, R.I.F., Kunzmann, M., and Nogueira, A.C.R., 2014, Ocean redox structure across the Late Neoproterozoic Oxygenation Event: A nitrogen isotope perspective. Earth and Planetary Science Letters, vol. 396, pp. 1– 13.
Kunzmann, M., Gutzmer, J., Beukes, N.J., Halverson, G.P., 2014. Depositional environment and lithostratigraphy of the paleoproterozoic mooidraai formation, kalahari manganese field, South Africa. South African Journal of Geology 117 (2), 173-192.
Nettle, D., Halverson, G.P., Cox, G.M., Collins, A.S., Schmitz, M., Gehling, J., Johnson, P.R., Kadi, K. 2014, A middle-late Ediacaran volcano-sedimentary record from the eastern Arabian-Nubian shield, Terra Nova, vol. 26, no. 2, pp120-129.
Rebesco, M., Domack, E., Zgur, F., Lavoie, C., Leventer, A., Brachfeld, S., Willmott, V., Halverson, G., Truffer, M., Scambos, T., Smith, J., Pettit, E. 2014, Boundary condition of grounding lines prior to collapse, Larsen-B Ice Shelf, Antarctica, Science, vol. 345, no. 6202, pp. 1354-1358.
Barr, C., Tibby, J., Marshall, J.C., McGregor, G.C., Moss, P., Halverson, G., and Fluin, J., 2013. Combining monitoring, models and palaeolimnology to assess ecosystem response to environmental change at monthly to millennial time scales: The stability of Blue Lake, North Stradbroke Island, Australia. Freshwater Biology, vol. 58, pp. 1614–1630.
Cox, G.M., Halverson, G.P., Minarik, W.G., Le Heron, D.P., Macdonald, F.A., Bellefroid, E.J., Strauss, J.V. 2013, Neoproterozoic iron formation: An evaluation of its temporal, environmental and tectonic significance, Chemical Geology, vol. 362, pp. 232-249.
Johnson, P.R., Halverson, G.P., Kusky, T.M., Stern, R.J., Pease, V. 2013, Volcanosedimentary basins in the arabian-nubian shield: Markers of repeated exhumation and denudation in a neoproterozoic accretionary Orogen, Geosciences (Switzerland), vol. 3, no. 3, pp. 389-445.
Johnston, D.T., Poulton, S.W., Tosca, N.J., O'Brien, T., Halverson, G.P., Schrag, D.P., Macdonald, F.A. 2013, Searching for an oxygenation event in the fossiliferous Ediacaran of northwestern Canada, Chemical Geology, vol. 362, pp. 273-286.
Kunzmann, M., Halverson, G.P., Sossi, P.A., Raub, T.D., Payne, J.L., Kirby, J. 2013, Zn isotope evidence for immediate resumption of primary productivity after snowball Earth, Geology, vol. 41, no. 1, pp. 27-30.
Li, Z.-X., Evans, D.A.D., Halverson, G.P. 2013, Neoproterozoic glaciations in a revised global palaeogeography from the breakup of Rodinia to the assembly of Gondwanaland, Sedimentary Geology, vol. 294, pp. 219-232.
Macdonald, F.A., Strauss, J.V., Sperling, E.A., Halverson, G.P., Narbonne, G.M., Johnston, D.T., Kunzmann, M., Schrag, D.P., Higgins, J.A. 2013, The stratigraphic relationship between the Shuram carbon isotope excursion, the oxygenation of Neoproterozoic oceans, and the first appearance of the Ediacara biota and bilaterian trace fossils in northwestern Canada, Chemical Geology, vol. 362, pp. 250-272.
Payne, J.L., Pearson, N.J., Grant, K.J., Halverson, G.P. 2013, Reassessment of relative oxide formation rates and molecular interferences on in situ lutetium-hafnium analysis with laser ablation MC-ICP-MS, Journal of Analytical Atomic Spectrometry, vol. 28, no. 7, pp. 1068-1079.
Sperling, E.A., Halverson, G.P., Knoll, A.H., MacDonald, F.A., Johnston, D.T. 2013, A basin redox transect at the dawn of animal life, Earth and Planetary Science Letters, vol. 371-372, pp. 143-155.
Caxito, F.D.A., Halverson, G.P., Uhlein, A., Stevenson, R., Gonçalves Dias, T., Uhlein, G.J. 2012. Marinoan glaciation in east Brazil. Precambrian Research, vol. 200-203, no. 2, pp. 38-58.
Cox, G.M., Lewis, C.J., Collins, A.S., Halverson, G.P., Jourdan, F., Foden, J., Nettle, D., Kattan, F., 2012. Ediacaran terrane accretion within the Arabian-Nubian Shield, Gondwana Research, vol. 21, no. 2-3, pp. 341-352.
Gallet, Y., Pavlov, V., Halverson, G., Hulot, G. 2012. Toward constraining the long-term reversing behavior of the geodynamo: A new "Maya" superchron ~1 billion years ago from the magnetostratigraphy of the Kartochka Formation (southwestern Siberia). Earth and Planetary Science Letters, vol. 339, pp. 117-126.
Hoffman, P.F., Halverson, G.P., Domack, E.W., Maloof, A.C., Swanson-Hysell, N.L., Cox, G.M. 2012. Cryogenian glaciations on the southern tropical paleomargin of Laurentia (NE Svalbard and East Greenland), and a primary origin for the upper Russoya (Islay) carbon isotope excursion. Precambrian Research, vol. 206, pp. 137-158.
Macdonald, F. A., Halverson, G. P., Strauss, J. V., Smith, E. F., Cox, G., Sperling, E. A., Roots, C. F. 2012. Early neoproterozoic basin formation in Yukon, Canada: Implications for the make-up and break-up of Rodinia. Geoscience Canada, vol. 39, no. 2, pp. 77-100.
McGee, B., Halverson, G.P., Collins, A.S. 2012. Cryogenian rift-related magmatism and sedimentation: South-western Congo Craton, Namibia. Journal of African Earth Sciences, vol. 76, pp. 34-49.
Sossi, P. A., Foden, J. D., Halverson, G. P. 2012. Redox-controlled iron isotope fractionation during magmatic differentiation: An example from the Red Hill intrusion, S. Tasmania. Contributions to Mineralogy and Petrology, vol. 164, no. 5, pp. 757-772.
Swanson-Hysell, N.L., Maloof, A.C., Kirschvink, J.L., Evans, D.A.D., Halverson, G.P., Hurtgen, M.T. 2012, Constraints on neoproterozoic paleogeography and paleozoic orogenesis from paleomagnetic records of the bitter springs formation, amadeus basin, central Australia, American Journal of Science, vol. 312, no. 8, pp. 817-884.
Arnaud, E., Halverson, G.P., Shields-Zhou, G. 2011. Chapter 1 The geological record of Neoproterozoic ice ages. Geological Society Memoir, vol. 36, no.1, pp. 1-16.
Hall, P.A., McKirdy, D.M., Halverson, G.P., Jago, J.B., Gehling, J.G., 2011. Biomarker and isotopic signatures of an early Cambrian Lagerstätte in the Stansbury Basin, South Australia, Organic Geochemistry, vol. 42, no. 11, pp. 1324-1330.
Halverson, G.P., Poitrasson, F., Hoffman, P.F., Nédélec, A., Montel, J.-M., Kirby, J., 2011. Fe isotope and trace element geochemistry of the Neoproterozoic syn-glacial Rapitan iron formation, Earth and Planetary Science Letters, vol. 309, no. 1-2, pp. 100-112.
Halverson, G.P., Shields-Zhou, G. 2011. Chapter 4: Chemostratigraphy and the Neoproterozoic glaciations. Geological Society Memoir, 36 (1) pp. 51-66.
McKirdy, D.M., Hall, P.A., Nedin, C., Halverson, G.P., Michaelsen, B.H., Jago, J.B., Gehling, J.G., Jenkins, R.J.F., 2011. Paleoredox status and thermal alteration of the lower Cambrian (Series 2) Emu Bay Shale Lagerstätte, South Australia, Australian Journal of Earth Sciences, 58(3), 259-272.
Rice, A.H.N., Edwards, M.B., Hansen, T.A., Arnaud, E., Halverson, G.P. 2011. Chapter 57 Glaciogenic rocks of the Neoproterozoic Smalfjord and Mortensnes formations, Vestertana Group, E. Finnmark, Norway. Geological Society Memoir, 36 (1) pp. 593-602.
Stodt, F., Rice, A.H.N., Björklund, L., Bax, G., Halverson, G.P., Pharaoh, T.C. 2011. Chapter 58 Evidence of late Neoproterozoic glaciation in the Caledonides of NW Scandinavia. Geological Society Memoir, 36 (1) pp. 603-612
Hoffman, P.F., Halverson, G.P., Accepted. Neoproterozoic glacial record in the Mackenzie Mountains, northwest Canadian Cordillera, Ibid.
Rice, A.H.N., Edwards, M.B., Hansen, T.A., Arnaud, E., Halverson, G.P., Accepted. Glacigenic rocks of the Smalfjord and Mortensnes formations, Vestertana Group, E. Finnmark, Norway, Ibid.
Halverson, G.P., Wade, B.P., Hurtgen, M.T., Barovich, K.M., 2010. Neoproterozoic chemostratigraphy, Precambrian Research, 182(4), 337-350.
Haberlah, D., Williams, M.J., Halverson, G.P., Hill, S.M., Hrstka, T., Butcher, A.R., McTainsh, G.H., Glasby, P., 2010. Loess and floods: high-resolution multi-proxy data of Last Glacial Maximum (LGM) slackwater deposition in the Flinders Ranges, semi-arid South Australia, Quaternary Science Reviews, 29(19-20), 2673-2693.
Steer, M.A., Halverson, G.P., Fowler, A.J., Gillanders, B.M., 2010. Stock discrimination of Southern Garfish (Hyporhamphus melanochir) by stable isotope ratio analysis of otolith aragonite, Environmental Biology of Fishes, 89(3), 369-381.
Swanson-Hysell, N.L., Rose, C.V., Calmet, C., Halverson, G.P., Hurtgen, M.T., and Maloof, A.C., 2010. Cryogenian onset of a dynamic carbon cycle, Science, 328, 608-611, DOI: 10.1126/science.1184508.
McKirdy, D.M., Thorpe, C.S , Haynes, D.E., Grice, K., Krull, E.S., Halverson, G.P., Webster, L.J., 2010. The biogeochemical evolution of the Coorong during the mid- to late Holocene: An elemental, isotopic and biomarker perspective. Organic Geochemistry, 41, 96-110.
Hoffman, P.F., Calver, C., Halverson, G.P., 2009. Cottons Breccia of King Island, Tasmania: glacial or non-glacial, Cryogenian or Ediacaran? Precambrian Research, 172, 311-322.
Le Hir, G., Donnadieu, Y., Goddéris, Y., Pierrehumbert, R.T., Halverson, G.P., Macouin, M, Néedélec, A., Ramstein, G., 2009. The snowball Earth aftermath: exploring the limits of continental weathering processes, Earth and Planetary Science Letters, 277, 453-463.
Domack, E.W., Halverson, G.P. Willmott, V., Leventer, A., Brachfield, S., Ishman, S., 2007. Spatial and temporal distribution of ikaite crystals in Antarctic glacial marine sediments, United States Geological Survey and The National Academies, USGS OF-2007-1047, Extended Abstract 015, 5p.
Halverson, G.P. Hurtgen, M.T., 2007. Ediacaran growth of the marine sulfate reservoir, Earth and Planetary Science Letters, 263, 32-44.
Halverson, G.P., Dudas, F., Maloof, A.C., Bowring, S.A, 2007. Evolution of the 87Sr/86Sr Composition of Neoproterozoic Seawater, Palaeogeography, Palaeoclimatology, Palaeoecology, 256, 103-129.
Halverson, G.P., Maloof, A.C. Schrag, D.P., Dudas, F., Hurtgen, M.T., 2007. Stratigraphy and geochemistry of a ca 800 Ma carbon isotope interval in northeastern Svalbard, Chemical Geology, 237, 23-45.
Hoffman, P.F., Halverson, G.P., Domack, E.W., Husson, J.M., Higgins, J.A., and Schrag, D.P., 2007. Are basal Ediacaran (635 Ma) post-glacial “cap-dolostones” diachronous? Earth and Planetary Science Letters, 258, 114-131.
Hurtgen, M.T., Halverson, G.P., Arthur, M., and Hoffman, P.F., 2006. Sulfur cycling in the aftermath of a Neoproterozoic (Marinoan) snowball glaciation: evidence for a syn-glacial, sulfidic deep ocean, Earth and Planetary Science Letters, 245, 551-570.
Maloof, A.C., Halverson, G.P., Kirschvink, J.L., Schrag, D.P., Weiss, Benjamin P., Hoffman, P.F., 2006. Combined paleomagnetic, isotopic, and stratigraphic evidence for true polar wander from the Neoproterozoic Akademikerbreen Group, Svalbard, Geological Society of America Bulletin, 118, 1099-1124.
Published Books and Peer-Reviewed Book Chapters:
Halverson, G.P. and Shields, G., In press. Chemostratigraphy and the Neoproterozoic glaciations. In: Arnaud, E., Halverson, G.P. & Shields-Zhou, G.A. (Eds.) The Geological Record of Neoproterozoic glaciations. Geological Society of London.
Halverson, G.P., In press. Glacial sediments and associated strata of the Polarisbreen Group, northeastern Svalbard. In E. Arnaud, G. Shields, and G.P. Halverson (Eds.), The Geological Record of Neoproterozoic Glaciations, Geological Society of London.
Hoffman, P.F., and Halverson, G.P., In press. Neoproterozoic glacial record in the Mackenzie Mountains, northwest Canadian Cordillera. Ibid .
Hoffman, P.F., Macdonald, F.A., and Halverson, G.P., In press. Chemical sediments associated with Neoproterozoic glaciations: Iron formation, cap carbonates, barite, and phosphorite. Ibid.
Rice, A.H.N., Edwards, M.B., Hansen, T.A., Arnaud, E., and Halverson, G.P., In press. Glacigenic rocks of the Smalfjord and Mortensnes formations, Vestertana Group, E. Finnmark, Norway. Ibid.
Stodt, F., Rice, A.H.N., Björklund, L., Bax, G., Halverson, G.P., Pharaoh, T.C., In press. Evidence of late Neoproterozoic glaciation in the Caledonides of NW Scandinavia, Ibid.
Gaucher, C., Sial, A.N., Halverson, G.P., and Frimmel, H.E. (Eds.), 2009. Neoproterozoic-Cambrian Tectonics, Global Change and Evolution: A Focus on Southwestern Gondwana, Developments in Precambrian Geology, Vol. 16. Elsevier, 466 pp.
Gaucher, C., Sial, A.N., Halverson, G.P., and Frimmel, H., 2009. The Neoproterozoic and Cambrian: A time of upheavals, extremes, and innovations. In: Gaucher, C., Sial, A.N., Halverson, G.P., and Frimmel, H.E. (Eds.), Neoproterozoic-Cambrian Tectonics, Global Change and Evolution: A Focus on Southwestern Gondwana. Developments in Precambrian Geology, Vol. 16. Elsevier pp. 3-11.
Halverson, G.P., Hurtgen, M.T., Porter, S.M., and Collins, A.C., 2009. Neoproterozoic-Cambrian biogeochemical evolution, Ibid, pp. 351-365.
Miller, R. McG., Frimmel, H., and Halverson, G.P., 2009. Neoproterozoic to Early Palaeozoic Evolution of Southwestern Africa: Passive Continental Margin Evolution, Ibid, pp. 161-181.
Hoffman, P.F. and Halverson, G.P., 2008. Otavi Group of the western Northern Platform, the Eastern Kaoko Zone and the western Northern Margin Zone. In: R. McG. Miller (Ed.), The Geology of Namibia, Vol. 2, Geological Survey of Namibia (Windhoek), pp. 69-136.
Halverson, G.P., 2006. A Neoproterozoic chronology. In S. Xiao, A.J. Kaufman (Eds.), Neoproterozoic Geobiology and Paleobiology, Topics in Geobiology, 27. Springer, pp. 231-271.
Department of Earth and Planetary Sciences, McGill
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Département des sciences de la Terre et de l'atmosphère, Université du Québec à Montréal
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Department of Earth and Planetary Sciences, McGill
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Department of Earth and Planetary Sciences, McGill
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Sujet de recherche : The late Paleoproterozoic to early Mesoproterozoic Birindudu Basin (Northern Territory, Australia): Correlations with the McArthur Basin and Tectonic Implications for the development of intracratonic basins.
Department of Earth and Planetary Sciences, McGill
Department of Earth and Planetary Sciences, McGill
Codirection : Joshua Davies
Sujet de recherche : Stratigraphie séquentielle et chimiostratigraphie de la Plateforme du Saint Laurent, dans la region de Montréal
Department of Earth and Planetary Sciences, McGill
Codirection : Christie Rowe
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Department of Earth and Planetary Sciences, McGill
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Département des sciences de la Terre et de l'atmosphère, Université du Québec à Montréal
Codirection : Joshua Davies
Sujet de recherche : Improving chronology of the Pre-Sturtian isotope excursions using Bayesian modelling and improved maximum depositional ages.
Department of Earth and Planetary Sciences, McGill
Sujet de recherche : Sequence Stratigraphy of the ca. 1.6 Ga Gillespie Lakes Group, Yukon.
Department of Earth and Planetary Sciences, McGill