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Volume 15, Number 3
1 June 2019
Geosphere Cover Image for Volume 15, Issue 3
EISSN: 1553-040X
Pleistocene hydrothermal activity on Brokeoff volcano and in the Maidu volcanic center, Lassen Peak area, northeast California: Evolution of magmatic-hydrothermal systems on stratovolcano...
David A. John; Robert G. Lee; George N. Breit; John H. Dilles; Andrew T. Calvert; L.J. Patrick Muffler; Michael A. Clynne
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THEMED ISSUE: Subduction Top to Bottom 2

Lu-Hf and Sm-Nd geochronological constraints on the influence of subduction metamorphism in controlling the Hf-Nd terrestrial array: Evidence from the world’s orogenic belts
N. Alex Zirakparvar
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The robustness of Sr/Y and La/Yb as proxies for crust thickness in modern arcs
Warren K. Lieu; Robert J. Stern
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The role of the upper plate in controlling fluid-mobile element (Cl, Li, B) cycling through subduction zones: Hikurangi forearc, New Zealand
Jaime D. Barnes; Jeffrey Cullen; Shaun Barker; Samuele Agostini; Sarah Penniston-Dorland; John C. Lassiter; Andreas Klügel; Laura Wallace
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Eocene initiation of the Cascadia subduction zone: A second example of plume-induced subduction initiation?
Robert J. Stern; Trevor A. Dumitru
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THEMED ISSUE: Geologic Evolution of the Alaska Range and Environs

A river runs through it both ways across time: 40Ar/39Ar detrital and bedrock muscovite geochronology constraints on the Neogene paleodrainage history of the Nenana River system, Alaska R...
Jeff A. Benowitz; Kailyn Davis; Sarah Roeske
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THEMED ISSUE: Human Dimensions in Geoscience

What perceptions do scientists have about their potential role in connecting science with policy?
Scott E. Kalafatis; Julie C. Libarkin
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THEMED ISSUE: Cenozoic Tectonics, Magmatism, and Stratigraphy of the Snake River Plain–Yellowstone Region and Adjacent Areas

40Ar/39Ar and paleomagnetic constraints on the age and areal extent of the Picabo volcanic field: Implications for the Yellowstone hotspot
Mark H. Anders; Victor J. DiVenere; Sidney R. Hemming; Joel Gombiner
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Volcanic stratigraphy and age model of the Kimama deep borehole (Project Hotspot): Evidence for 5.8 million years of continuous basalt volcanism, central Snake River Plain, Idaho
Katherine E. Potter; Duane E. Champion; Robert A. Duncan; John W. Shervais
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THEMED ISSUE: CRevolution 2: Origin and Evolution of the Colorado River System II

Birth and evolution of the Virgin River fluvial system: ∼1 km of post–5 Ma uplift of the western Colorado Plateau
Cory J. Walk; Karl E. Karlstrom; Ryan S. Crow; Matthew T. Heizler
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Current Issue Articles

The Tahoe-Sierra frontal fault zone, Emerald Bay area, Lake Tahoe, California: History, displacements, and rates
R.A. Schweickert; J.G. Moore; M.M. Lahren; W. Kortemeier; C. Kitts; T. Adamek
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Pleistocene to recent geomorphic and incision history of the northern Rio Grande gorge, New Mexico: Constraints from field mapping and cosmogenic 3He surface exposure dating
T. Clow; W.M. Behr; M.A. Helper
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Identification of a global sequence boundary within the upper Homerian (Silurian) Mulde Event: High-resolution chronostratigraphic correlation of the midcontinent United States with Swede...
Erika M. Danielsen; Bradley D. Cramer; Mark A. Kleffner
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Geologic framework of the northern Indo-Burma Ranges and lateral correlation of Himalayan-Tibetan lithologic units across the eastern Himalayan syntaxis
Peter J. Haproff; Andrew V. Zuza; An Yin; T. Mark Harrison; Craig E. Manning; Chandra S. Dubey; Lin Ding; Chen Wu; Jianlin Chen
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Active dextral strike-slip faulting records termination of the Walker Lane belt at the southern Cascade arc in the Klamath graben, Oregon, USA
Trevor S. Waldien; Andrew J. Meigs; Ian P. Madin
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Polyphase kinematic history of transpression along the Mecca Hills segment of the San Andreas fault, southern California
Steffen G. Bergh; Arthur G. Sylvester; Alula Damte; Kjetil Indrevær
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The 2015 Ms 6.5 Pishan earthquake, Northwest Tibetan Plateau: A folding event in the western Kunlun piedmont
Chuanyong Wu; Jianming Liu; Jin Li; Weihua Hu; Guodong Wu; Xiangde Chang; Yuan Yao
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  • Cover Image

    Cover Image

    issue cover

    CAPTION: Recently replenished saltwater Lake Urmia (northwest Iran) is seen in this 12 April 2019 image. Once covering a surface area of 5000 km2, drought and high demand for water beginning in the 1970s diminished its size by 80%. Then, after heavy rainfall in fall 2018 and spring 2019 and seasonal snowmelt runoff, the lake surged to roughly 3000 km2 in April 2019.

    CREDIT: NASA Earth Observatory image by Lauren Dauphin, using Moderate Resolution Imaging Spectroradiometer (MODIS) data from NASA EOSDIS/LANCE and GIBS/Worldview. Image acquired by MODIS on NASA’s Terra satellite.

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