Pleistocene hydrothermal activity on Brokeoff volcano and in the Maidu volcanic center, Lassen Peak area, northeast California: Evolution of magmatic-hydrothermal systems on stratovolcanoes
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
The role of the upper plate in controlling fluid-mobile element (Cl, Li, B) cycling through subduction zones: Hikurangi forearc, New Zealand
Eocene initiation of the Cascadia subduction zone: A second example of plume-induced subduction initiation?
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 Range
THEMED ISSUE: Human Dimensions in Geoscience
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
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
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
Current Issue Articles
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
Identification of a global sequence boundary within the upper Homerian (Silurian) Mulde Event: High-resolution chronostratigraphic correlation of the midcontinent United States with Sweden and the United Kingdom
Geologic framework of the northern Indo-Burma Ranges and lateral correlation of Himalayan-Tibetan lithologic units across the eastern Himalayan syntaxis
Active dextral strike-slip faulting records termination of the Walker Lane belt at the southern Cascade arc in the Klamath graben, Oregon, USA
Polyphase kinematic history of transpression along the Mecca Hills segment of the San Andreas fault, southern California
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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