Download or read book Late Quaternary Glacier Fluctuations at Picayune Lake Northern California written by Aidan Patrick Cowan and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Klamath Mountains are a 233-km-long (north to south) mountain range located in northern California that shows extensive geomorphic evidence of Pleistocene glaciation. Within the Klamath’s there are many highland lakes, which record evidence of glacial deposition, one of which is Picayune Lake. Lake sediment data collected from Picayune Lake offers insights into the glaciation, and broader depositional history of the Picayune Lake Valley, as well as the climate history of the Klamath Mountains region. I measured magnetic susceptibility, loss on ignition, and grain size in sediment cores and used radiocarbon dating to determine a chronology of glacier fluctuations in the valley. The data show that deglaciation occurred as recently as 11,340 ± 660 cal yr BP and as late as 13,610 ± 120 cal yr BP. Middle Holocene records from Picayune Lake record an inwash of coarse sediments at 7140 ± 690 cal yr BP, as well as deposition of an unsourced tephra at 5640 ± 310 cal yr BP. Late Holocene records from Picayune Lake record layers of coarse sediment at 2490 ± 450 cal yr BP and 1530 ± 220 cal yr BP that I interpret as sediment being washed off the surrounding landscape and deposited into the lake. A second tephra was found at 870 ± 200 cal yr BP, which may have originated from the Little Glass Mountain eruption in northeastern California. The sedimentological record shows no evidence of late Holocene glacier renewal at this site, similar to other low elevation cirques in the region.
Download or read book Late Quaternary Climate Tectonism and Sedimentation in Clear Lake Northern California Coast Ranges written by John D. Sims and published by Geological Society of America. This book was released on 1988 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Late Quaternary Glaciations in the Eastern San Bernardino Mountains written by Anne Elizabeth Perez and published by . This book was released on 2003 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Late Holocene Glacial Advances in the Klamath Mountains Northern California Determined from 10Be Cosmogenic Exposure Dating and Dendrochronology written by Joshua Tate Graham and published by . This book was released on 2013 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: The well-preserved moraines in the cirque at the head of Grizzly Creek, Klamath Mountains, California, provide the most complete record of late-Holocene glacier fluctuations yet documented in this region. Two separate moraine complexes lie below the modern glacier, within the cirque, only one of which supports substantial tree growth. 10Be cosmogenic ages of scoured bedrock surfaces and moraine boulders, as well as tree-ring ages indicate the approximate timing of glacial maxima in the Grizzly Valley cirque. The combination of the detailed climate record, provided by tree-ring widths, and the estimated moraine ages, determined from dendrochronology and cosmogenic dating, allows for an accurate reconstruction of the Grizzly Valley Glacier fluctuations over the last 1,000 years.
Download or read book Quaternary Glaciations Extent and Chronology written by J. Ehlers and published by Elsevier. This book was released on 2011-08-17 with total page 1128 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents an up-to-date, detailed overview of the Quaternary glaciations all over the world, not only with regard to stratigraphy but also with regard to major glacial landforms and the extent of the respective ice sheets. The locations of key sites are included. The information is presented in digital, uniformly prepared maps which can be used in a Geographical Information System (GIS) such as ArcView or ArcGIS. The accompanying text supplies the information on how the data were obtained (geomorphology, geological mapping, air photograph evaluation, satellite imagery), how the features were dated (14C, TL, relative stratigraphy) and how reliable they are supposed to be. All references to the underlying basic publications are included. Where controversial interpretations are possible e.g. in Siberia or Tibet, this is pointed out. As a result, the information on Quaternary glaciations worldwide will be much improved and supplied in a uniform digital format. The information on the glacial limits is compiled in digital form by the coordinators of the project, and is available for download at: http://booksite.elsevier.com/9780444534477/ Completely updated detailed coverage of worldwide Quaternary glaciations Information in digital, uniformly prepared maps which can be used in a GIS such as ArcView or ArcGis Step-by-step guideline how to open and use ArcGis files Possibility to convert the shapefiles into GoogleEarth kmz-files Availability of chronological controls
Download or read book Late Quaternary Glacier Fluctuations and Vegetation Change in the Northwestern Ahklun Mountains Southwestern Alaska written by Yarrow L. Axford and published by . This book was released on 2000 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lake Thompson Mojave Desert California written by A. R. Orme and published by . This book was released on 2004 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geomorphic Response to Late Quaternary Tectonism written by Dorothy Jane Merritts and published by . This book was released on 1991 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Late Quaternary Geomorphology Southwest Owens Lake California written by Bruce Anthony Piscitello and published by . This book was released on 2006 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lake Cahuilla written by Michael R. Waters and published by . This book was released on 1980 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Late Glacial and Deglacial Fluctuations of Mono Lake California written by Guleed Ali and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Thus the interval that the Big Low must occur within encompasses the LGM. The timing of this low stand, therefore, corresponds with summer temperature minima, suggesting that the fall was due not to an increase in evaporation but due to a decrease in precipitation. This finding is counter to conventional wisdom: that the LGM was a relatively wet interval. In addition, both the documentation of a low stand during glacial maximum conditions and the inference that precipitation must have been reduced are contrary to previous published interpretations from model and paleoclimatic data. These discrepancies raise significant questions about our understanding of the regional expression and forcing of hydroclimate across the western United States during the LGM. Because of this period’s importance to ground-truthing climatic models, additional evidence on the geographic extent of this unexpected result is essential.
Download or read book Late Quaternary Depositional History Holocene Sea level Changes and Vertical Crustal Movement Southern San Francisco Bay California written by Brian F. Atwater and published by . This book was released on 1977 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Late Quaternary Depositional History Holocene Sea level Changes and Vertical Crustal Movement Southern San Francisco Bay California written by Geological Survey (U.S.) and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Late Quaternary Depositional History Holocene Sea Level Changes and Vertical Crustal Movement Southern San Francisco Bay California written by Geological Survey (U.S.) and published by . This book was released on 1974 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Late Quaternary Glacier Fluctuations at Lillooet Diadem and Berendon Glaciers Coast Mountains British Columbia written by Lauren Annie Walker and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Late Quaternary Stratigraphy Paleohydrology and Geomorphology of Pluvial Lake Mojave Silver Lake and Soda Lake Basins Southern California written by William Jacques Brown and published by . This book was released on 1989 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Glacial geologic Approach to Studying Late Quaternary Climate and Ice Fluctuation in the Southern Hemisphere written by Gordon Bromley and published by . This book was released on 2010 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
