Boulder, Colo., USA: GSA s dynamic online journal,
Geosphere,
posts articles online regularly. Locations studied this month include the
western Himalaya, the boundary between the southern Coast Ranges and
western Transverse Ranges in California, the northern Sierra Nevada, and
northwest Nepal.
Marine sedimentary records of chemical weathering evolution in the
western Himalaya since 17 Ma
Peng Zhou; Thomas Ireland; Richard W. Murray; Peter D. Clift
Abstract:
The Indus Fan derives sediment from the western Himalaya and Karakoram.
Sediment from International Ocean Discovery Program drill sites in the
eastern part of the fan coupled with data from an industrial well near the
river mouth allow the weathering history of the region since ca. 16 Ma to
Current issue articles for
Geological Society of America
Geosphere, posts articles online regularly. Topics for articles posted for
Geosphere this month include feldspar recycling in Yosemite National Park; the Ragged Mountain Fault, Alaska; the Khao Khwang Fold and Thrust Belt, Thailand; the northern Sierra Nevada; and the Queen Charlotte Fault.
Feldspar recycling across magma mush bodies during the voluminous Half Dome and Cathedral Peak stages of the Tuolumne intrusive complex, Yosemite National Park, California, USA
Louis F. Oppenheim; Valbone Memeti; Calvin G. Barnes; Melissa Chambers; Joachim Krause .
Abstract: Incremental pluton growth can produce sheeted complexes with no magma-magma interaction or large, dynamic magma bodies communicating via crystal and melt exchanges, depending on pulse size and frequency of intrusions. Determining the degree and spatial extent of crystal-melt exchange along and away from plutonic contacts at or near the empla