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Volume 46, Number 2
1 February 2018
Geology Cover Image for Volume 46, Issue 2
ISSN: 0091-7613
EISSN: 1943-2682
In this Issue

Articles

Climate-soil model reveals causes of differences between Marine Isotope Stage 5e and 13 paleosols
Peter A. Finke; Qiuzhen Yin; Nicholas J. Bernardini; Yanyan Yu
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The role of asthenospheric flow during rift propagation and breakup
Luke S. Mondy; Patrice F. Rey; Guillaume Duclaux; Louis Moresi
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Widespread preservation of small carbonaceous fossils (SCFs) in the early Cambrian of North Greenland
Ben J. Slater; Sebastian Willman; Graham E. Budd; John S. Peel
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How well do zircons record the thermal evolution of magmatic systems?
Adam J.R. Kent; Kari M. Cooper
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High-angle, not low-angle, normal faults dominate early rift extension in the Corinth Rift, central Greece
Rebecca E. Bell; Guillaume Duclaux; Casey W. Nixon; Robert L. Gawthorpe; Lisa C. McNeill
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Determining the three-dimensional geometry of a dike swarm and its impact on later rift geometry using seismic reflection data
Thomas B. Phillips; Craig Magee; Christopher A.-L. Jackson; Rebecca E. Bell
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An exsolution origin for Archean mantle garnet
Emma L. Tomlinson; Balz S. Kamber; Brendan C. Hoare; Clare V. Stead; Benoit Ildefonse
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Changes in the latitudinal diversity gradient during the Great Ordovician Biodiversification Event
Björn Kröger
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Leaves in marine turbidites illuminate the depositional setting of the Pliocene Bowden shell beds, Jamaica
Emma R. Locatelli; Derek E.G. Briggs; Thomas A. Stemann; Roger W. Portell; Guy H. Means; Sherene A. James-Williamson; Stephen K. Donovan
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Precise age of Bangiomorpha pubescens dates the origin of eukaryotic photosynthesis
Timothy M. Gibson; Patrick M. Shih; Vivien M. Cumming; Woodward W. Fischer; Peter W. Crockford; Malcolm S.W. Hodgskiss; Sarah Wörndle; Robert A. Creaser; Robert H. Rainbird; Thomas M. Skulski; Galen P. Halverson
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Terrestrial methane fluxes and Proterozoic climate
Mingyu Zhao; Christopher T. Reinhard; Noah Planavsky
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An ancient estuarine-circulation nutrient trap: The Late Pennsylvanian Midcontinent Sea of North America
Thomas J. Algeo; Achim D. Herrmann
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A new high-resolution chronology for the late Maastrichtian warming event: Establishing robust temporal links with the onset of Deccan volcanism
James S.K. Barnet; Kate Littler; Dick Kroon; Melanie J. Leng; Thomas Westerhold; Ursula Röhl; James C. Zachos
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Persistent millennial-scale glacier fluctuations in Ireland between 24 ka and 10 ka
Aaron M. Barth; Peter U. Clark; Jorie Clark; Gerard H. Roe; Shaun A. Marcott; A. Marshall McCabe; Marc W. Caffee; Feng He; Joshua K. Cuzzone; Paul Dunlop
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Opening of glacial Lake Agassiz’s eastern outlets by the start of the Younger Dryas cold period
David J. Leydet; Anders E. Carlson; James T. Teller; Andrew Breckenridge; Aaron M. Barth; David J. Ullman; Gaylen Sinclair; Glenn A. Milne; Joshua K. Cuzzone; Marc W. Caffee
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Decoupling of Zr-Hf during contact metamorphic anatexis of metabasalts and timing of zircon growth, Sudbury, Canada
Taus R.C. Jørgensen; Douglas K. Tinkham; C. Michael Lesher; Joseph A. Petrus
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Generation of amorphous carbon and crystallographic texture during low-temperature subseismic slip in calcite fault gouge
Claudio Delle Piane; Sandra Piazolo; Nicholas E. Timms; Vladimir Luzin; Martin Saunders; Julien Bourdet; Ausama Giwelli; M. Ben Clennell; Charlie Kong; William D.A. Rickard; Michael Verrall
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Thermochronology links denudation of the Great Unconformity surface to the supercontinent cycle and snowball Earth
M.S. DeLucia; W.R. Guenthner; S. Marshak; S.N. Thomson; A.K. Ault
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Discovery of a meteoritic ejecta layer containing unmelted impactor fragments at the base of Paleocene lavas, Isle of Skye, Scotland
Simon M. Drake; Andrew D. Beard; Adrian P. Jones; David J. Brown; A. Dominic Fortes; Ian L. Millar; Andrew Carter; Jergus Baca; Hilary Downes
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80 m.y. of folding migration: New perspective on the Syrian arc from Levant Basin analysis
Y. Sagy; Z. Gvirtzman; M. Reshef
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Linking paleocontinents through triple oxygen isotope anomalies
Peter W. Crockford; Malcolm S.W. Hodgskiss; Gabriel J. Uhlein; Fabricio Caxito; Justin A. Hayles; Galen P. Halverson
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Channel slope adjustment in reduced gravity environments and implications for Martian channels
Kory M. Konsoer; Jessica LeRoy; Devon Burr; Gary Parker; Robert Jacobsen; Dominique Turmel
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Subtropical sea-surface warming and increased salinity during Eocene Thermal Maximum 2
Dustin T. Harper; Richard Zeebe; Bärbel Hönisch; Cindy D. Schrader; Lucas J. Lourens; James C. Zachos
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RESEARCH FOCUS

Forces within continental and oceanic rifts: Numerical modeling elucidates the impact of asthenospheric flow on surface stress
Sascha Brune
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Forum

Evidence from Paleosols for low to moderate elevation of the India-Asia suture zone during mid-Cenozoic time: COMMENT
Qiang Xu; Robert A. Spicer; Lin Ding
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Evidence from Paleosols for low to moderate elevation of the India-Asia suture zone during mid-Cenozoic time: REPLY
Ryan J. Leary; Jay Quade; Peter G. DeCelles
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  • Cover Image

    Cover Image

    issue cover

    COVER: A hydrothermal vent boils at 325 °C in the Niua South volcano, in the Tonga volcanic arc, South Pacific Ocean. In addition to the metal sulfides typically comprising the “black smoke,” this system also contains gold colloids that form upon boiling. See “Boiling-induced formation of colloidal gold in black smoker hydrothermal fluids” by Gartman et al., p. 39–42 in the January 2018 issue of Geology.

    Photo by: Virtual Vents science party using ROV ROPOS, operated by Canadian Scientific Submersible Facility on board the R/V Falkor (Schmidt Ocean Institute).

    Cover design by: Heather L. Sutphin

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  • Online ISSN 1943-2682
  • ISSN 0091-7613
  • Copyright © 2025 Geological Society of America
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