Replacement Ore Deposits in the Sierra Nevada
نویسندگان
چکیده
منابع مشابه
Fire in the Sierra Nevada
Fire has been described as both a major ecological force necessary for long-term functioning of Sierra Nevada ecosystems and as one of the greatest threats to human and natural resources (SNEP 1996a). Fire has shaped the terrestrial ecosystems of the Sierra Nevada for millennia. Before the mid-1800s, fires generally were frequent and mostly of low to moderate intensity, from lower-elevation blu...
متن کاملManaging Sierra Nevada Forests
Fire will continue to be a major management challenge in mixed-conifer forests in the Sierra Nevada. Fire is a fundamental ecosystem process in these forests that was largely eliminated in the 20th century. Fire reintroduction is a critical goal but is subject to constraints such as smoke production, risk of fire moving outside designated boundaries, the expanding wildland-urban interface, and ...
متن کاملUsing cave deposits as geologic tiltmeters: Application to postglacial rebound of the Sierra Nevada, California
[1] Secondary calcite shelfstone deposits in caves can be used to precisely measure tilting over geologic timescales. Calcite deposited along the edges of former pools can be surveyed to within a single millimeter, and can be dated using uranium-series disequilibrium. Two caves in the southern Sierra Nevada, California, contain tilted calcite deposits of glacial age. A third cave contains a sim...
متن کاملManaging Sierra Nevada Forests
1 Research ecologist, U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station, 1731 Research Park Dr., Davis, CA 95618. 2 Information Center for the Environment, Department of Environmental Science and Policy, One Shields Ave., University of California, Davis, Davis, CA 95616. 3 National coordinator for experimental forests and ranges, U.S. Department of Agriculture, ...
متن کاملNumic Expansion in the Southern Sierra Nevada
Recent research indicates that late prehistoric Numic expansion onto the western slope of the southern Sierra Nevada was facilitated by a competitive edge held by migrating groups, mainly Great Basinderived settlement and subsistence behaviors finetuned to the uncertainties of living in Little Ice Age mountain environments. But ethnographic, linguistic, and archaeological evidence also sugges...
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ژورنال
عنوان ژورنال: The Journal of Geology
سال: 1899
ISSN: 0022-1376,1537-5269
DOI: 10.1086/608391