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Issues
Volume 48, Number 4
1 April 2020
ISSN 0091-7613
EISSN 1943-2682
In this Issue
Articles
Dramatic weakening of the East Asian summer monsoon in northern China during the transition from the Medieval Warm Period to the Little Ice Age
Jianghu Lan; Hai Xu; Yunchao Lang; Keke Yu; Peng Zhou; Shugang Kang; Kangen Zhou; Xulong Wang; Tianli Wang; Peng Cheng; Dongna Yan; Shiyong Yu; Ping Che; Yuanda Ye; Liangcheng Tan
Geology January 03, 2020, Vol.48, 307-312. doi:https://doi.org/10.1130/G46811.1
A significant acceleration of ice volume discharge preceded a major retreat of a West Antarctic paleo–ice stream
Geology January 03, 2020, Vol.48, 313-317. doi:https://doi.org/10.1130/G46916.1
Modeling the dynamics of a Late Triassic vertebrate extinction: The Adamanian/Revueltian faunal turnover, Petrified Forest National Park, Arizona, USA
Reilly F. Hayes; Gavino Puggioni; William G. Parker; Catherine S. Tiley; Amanda L. Bednarick; David E. Fastovsky
Geology January 03, 2020, Vol.48, 318-322. doi:https://doi.org/10.1130/G47037.1
Multi-stage arc magma evolution recorded by apatite in volcanic rocks
Chetan L. Nathwani; Matthew A. Loader; Jamie J. Wilkinson; Yannick Buret; Robert H. Sievwright; Pete Hollings
Geology January 17, 2020, Vol.48, 323-327. doi:https://doi.org/10.1130/G46998.1
Microbial life in the nascent Chicxulub crater
Bettina Schaefer; Kliti Grice; Marco J.L. Coolen; Roger E. Summons; Xingqian Cui; Thorsten Bauersachs; Lorenz Schwark; Michael E. Böttcher; Timothy J. Bralower; Shelby L. Lyons; Katherine H. Freeman; Charles S. Cockell; Sean P.S. Gulick; Joanna V. Morgan; Michael T. Whalen; Christopher M. Lowery; Vivi Vajda
Geology January 17, 2020, Vol.48, 328-332. doi:https://doi.org/10.1130/G46799.1
Fast cooling of normal-fault footwalls: Rapid fault slip or thermal relaxation?
Geology January 17, 2020, Vol.48, 333-337. doi:https://doi.org/10.1130/G46940.1
Periodicity in fields of elongating dunes
Geology January 31, 2020, Vol.48, 343-347. doi:https://doi.org/10.1130/G46987.1
Reshuffling the Columbia River Basalt chronology—Picture Gorge Basalt, the earliest- and longest-erupting formation
Geology January 31, 2020, Vol.48, 348-352. doi:https://doi.org/10.1130/G47122.1
Channel-levee evolution in combined contour current–turbidity current flows from flume-tank experiments
Elda Miramontes; Joris T. Eggenhuisen; Ricardo Silva Jacinto; Giovanni Poneti; Florian Pohl; Alexandre Normandeau; D. Calvin Campbell; F. Javier Hernández-Molina
Geology January 31, 2020, Vol.48, 353-357. doi:https://doi.org/10.1130/G47111.1
Constraints on the coevolution of oxic and sulfidic ocean iron sinks from Archean–Paleoproterozoic iron isotope records
Geology January 31, 2020, Vol.48, 358-362. doi:https://doi.org/10.1130/G46951.1
Early Mississippian ocean anoxia triggered organic carbon burial and late Paleozoic cooling: Evidence from uranium isotopes recorded in marine limestone
Geology January 31, 2020, Vol.48, 363-367. doi:https://doi.org/10.1130/G46950.1
Distributed ductile thinning during thrust emplacement: A commonly overlooked exhumation mechanism
Geology January 31, 2020, Vol.48, 368-373. doi:https://doi.org/10.1130/G47022.1
Direct evidence for fluid overpressure during hydrocarbon generation and expulsion from organic-rich shales
Geology January 31, 2020, Vol.48, 374-378. doi:https://doi.org/10.1130/G46650.1
Coexisting seismic behavior of transform faults revealed by high-resolution bathymetry
G.E. Hilley; R.M. Sare; F. Aron; C.W. Baden; D.W. Caress; C.M. Castillo; S.C. Dobbs; J.T. Gooley; S.A. Johnstone; F. Liu; T. McHargue; J.M. Nevitt; C.K. Paull; L. Shumaker; M.M. Traer; H.H. Young
Geology February 06, 2020, Vol.48, 379-384. doi:https://doi.org/10.1130/G46663.1
Magnetotelluric imaging of a fossil oceanic plate in northwestern Xinjiang, China
Geology February 06, 2020, Vol.48, 385-389. doi:https://doi.org/10.1130/G47053.1
Early human occupation of southeastern Australia: New insights from 40Ar/39Ar dating of young volcanoes
Geology February 06, 2020, Vol.48, 390-394. doi:https://doi.org/10.1130/G47166.1
Arctic sea ice export as a driver of deglacial climate
Geology January 31, 2020, Vol.48, 395-399. doi:https://doi.org/10.1130/G47016.1
Half a million years of magmatic history recorded in a K-feldspar megacryst of the Tuolumne Intrusive Complex, California, USA
Geology February 14, 2020, Vol.48, 400-404. doi:https://doi.org/10.1130/G46873.1
Integrated geophysical characterization of crustal domains in the eastern Black Sea
Geology February 06, 2020, Vol.48, 405-409. doi:https://doi.org/10.1130/G47056.1
Herbivory and its effect on Phanerozoic oxygen concentrations
Geology February 14, 2020, Vol.48, 410-414. doi:https://doi.org/10.1130/G47085.1
ERRATUM
ERRATUM: Late Paleogene emergence of a North American loess plateau
Geology April 01, 2020, Vol.48, 414. doi:https://doi.org/10.1130/G47102E.1
Research Focus
Fe isotope composition of Archean sulfides do not record progressive oxygenation of the ocean
Geology April 01, 2020, Vol.48, 415-416. doi:https://doi.org/10.1130/focus042020.1
Forum
Uranium isotopic constraints on the nature of the prehistoric flood at the Lajia site, China: COMMENT
Geology April 01, 2020, Vol.48, e499. doi:https://doi.org/10.1130/G472872C.1
Uranium isotopic constraints on the nature of the prehistoric flood at the Lajia site, China: REPLY
Geology April 01, 2020, Vol.48, e500. doi:https://doi.org/10.1130/G47462Y.1
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Cover Image
Cover Image
![issue cover]()
COVER: A 17.0 Ma lava flow of the Picture Gorge Basalt capping the 32 Ma tuff of Dale of the Tower Mountain volcanic field. The Picture Gorge Basalt is part of the main eruptive phase of flood basalt lavas of the Columbia River Basalt Group. The outcrop is spectacularly exposed along the North Fork of the John Day River, northeast Oregon, USA. See Cahoon et al., “Reshuffling the Columbia River Basalt chronology—Picture Gorge Basalt, the earliest- and longest-erupting formation,” p. 348–352.
Photo by: Martin Streck
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