Download or read book A Late Pleistocene and Holocene High resolution Glacial and Paleoclimate Record from the Southern Sangre de Cristo Mountains Northern New Mexico written by Jake Armour and published by . This book was released on 2002 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Geology of New Mexico written by and published by . This book was released on 2004 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Mexico Geology written by and published by . This book was released on 2012 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A High resolution Study of a Late Pleistocene Interglacial glacial Transition and Its Periodicity in Owens Lake California Core OL 92 written by Cassaundra Ashley-Rochelle Meyers and published by . This book was released on 2010 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Mexico s Ice Ages written by Spencer G. Lucas and published by New Mexico Museum of Natural History and Science. This book was released on 2005-01-01 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Paleoglacier Reconstruction and Estimates of Late Pleistocene Climate in the Southern Sangre de Cristo Mountains New Mexico written by Robert E. Jacobsen and published by . This book was released on 2010 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chronology and Paleoclimate of Late Pleistocene Glaciation in the Klamath Mountains CA written by Nathan W. Dickey and published by . This book was released on 2016 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glaciers are sensitive to local and global climate variations, especially to changes in precipitation and temperature over sub-millennial timescales. Therefore, glacial deposits are excellent tools for reconstructing past climates. The western United States exhibits an excellent record of glaciation, but ongoing work across the region shows complex and yetunexplained variation in timing and extent of deglaciation between different mountain ranges at the end of the Last Glacial Maximum (LGM). The Trinity Alps of the southern Klamath Mountains in Northern California contain an excellent record of Pleistocene glaciation which I use to fill a significant spatial gap in published glacial chronologies and to provide a bridge between the Sierra Nevada and the Cascades. The Trinity Alps Wilderness is a 2,130 sq. km. federally designated area located at 41.00° N, 123.00°W, approximately 60 km southwest of Mt. Shasta in Northern California. Glacial deposits in the Trinity Alps were located using Google Earth and previously published maps, and were confirmed in the field. Building on a series of previous expeditions, in the summer of 2015 twenty-four samples from five moraines were taken for 10Be exposure dating, as well as three samples from striated bedrock. Of these, six samples were selected for exposure age analysis: five from two early LGM moraines and one from an older moraine. These ages, in addition to twenty-four ages determined in a previous study, provide evidence for at least two stages of post-LGM glaciation of similar extent throughout the Trinity Alps: the first ending at 16.83 ± 1.85 ka, the second at 12.29 ± 1.23 ka. These ages correlate with the regional LGM (~17 ka) and the global Younger Dryas (~12 ka) cooling event, respectively. The moraine maps were then used to constrain results from a climate-driven 2D numerical model of glacier mass balance and flow. This model was used to determine the potential precipitation and temperature difference from modern climate that would generate the mapped glaciers. Comparison of the resulting paleoclimate curves with nearby proxies and global climate models suggest that an approximate 5.5°C decrease in temperature and 0 to 25% increase in precipitation drove LGM glaciation in the region. Additionally, these results suggest that a similarly wet but slightly warmer-than-LGM climate drove a regionally asynchronous re-advance in the Trinity Alps linked with the Younger Dryas cooling event.
Download or read book Field Conference written by New Mexico Geological Society and published by . This book was released on 1999 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Southwest U S Paleoclimate Over the Past 30 Ky written by Kevin J. Meyer and published by . This book was released on 2011 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: A 30 ky growth rate and high-resolution [delta]18O time series from a central Texas (TX) speleothem provides new climate insights when integrated with recently published speleothem records from New Mexico (NM) and Arizona (AZ), and a foraminifera record from the Gulf of Mexico (GOM). This comparison enables a possible regional assessment of factors controlling temporal variations in rainfall amount and moisture sources in the southwestern U.S. The three speleothem locations (TX, NM, AZ) span near 1,200 km. A regional east-to-west decrease in speleothem [delta]18O values of up to 7%0 is observed between TX and AZ. This is the same direction of regional decrease as in modern rainfall. This suggests 1) mixing of moisture from two sources, Pacific moisture (low [delta]18O), and GOM moisture (high [delta]18O), and 2) that these two sources have contributed moisture to the region for most of the last 30 ky. Prior to 15 ka, relatively large magnitude, millennial-scale oscillations (up to ~3%0) occur in the NM [delta]18O record while the TX and AZ records show smaller variations (~1 %0). Starting at about 15 ka, both the AZ and NM records show a rapid increase in delta18O, whereas TX shows a decrease. This dip in the TX [delta]18O record corresponds with a delta18O decrease in the GOM seawater record that has been attributed to melt water influx. TX and NM show peaks in growth rate between about 15 and 13 ka whereas AZ shows a peak between 13 and 11.5 ka. All three speleothem records show significant decreases in growth rate in the Holocene. The speleothem [delta]18O time series appear to reflect changes in rainfall amount and composition. The correspondence of the TX and GOM records indicates GOM moisture composition as the major control on Late Pleistocene to Holocene TX precipitation composition. NM and AZ, by contrast, apparently received varying proportions of Pacific and GOM sources over this time period. Periods of high [delta]18O values in the NM and AZ records, when combined with relative high growth rates, may suggest increased overall water availability and GOM moisture contribution. The growth rate records are consistent with a regional transition to a drier climate from the latest Pleistocene to the Holocene.
Download or read book Albuquerque Geology written by New Mexico Geological Society. Field Conference and published by . This book was released on 1999 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tectonic Development of the Southern Sangre de Cristo Mountains New Mexico written by New Mexico Geological Society. Field Conference and published by . This book was released on 1990 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Late Pleistocene Environments of North Pacific North America written by Calvin J. Heusser and published by . This book was released on 1960 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reconstructing High resolution Paleoclimate for Portions of the Last 250 000 Years from Cave of the Mounds Speleothems written by Cameron Jean Batchelor and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Pleistocene period was a time of Earth's History marked by 100-kyr paced glacial-interglacial cycles and dominated by the influence of polar glaciation that stimulated Earth system feedbacks. Climate archives that grew during the Pleistocene thus provide the opportunity to explore past climate variability during a time of known global forcings and when distinct climate transitions occurred. Other than ice cores - one of the most robust terrestrial climate archives used by the paleoclimate community - speleothem-based paleoclimate reconstructions provide some of the highest-resolution continental climate records. This is due to their ability to be precisely dated, relatively continuous growth potential that is uninterrupted by surficial erosional processes, and because they form within carbonate (karst) rocks which are located in a variety of locations from the low- to high-latitudes, and thus not restricted to one geographic location. For this dissertation, I use a collection of speleothem samples from a southwestern Wisconsin cave, Cave of the Mounds, to reconstruct paleoclimate for portions of the last 250,000 years. This dissertation seeks to (1) resolve high-resolution oxygen isotope (Îþ18O) records representative of mid-continental North America during former glacial and interglacial periods through the use of specialized imaging and mass spectrometry techniques, and (2) provide data that will characterize climate variability and regional climate response to distinct global forcings in a relatively data-sparse region of the world. Except for Chapter 1, which focuses on U-Th dating methods of speleothems, all chapters of this dissertation use specialized imaging (confocal laser fluorescent microscopy, CLFM) and mass spectrometry (secondary ion mass spectrometer, SIMS) techniques to produce high-resolution Îþ18O records during different time periods of the last 250,000 years. Each chapter focuses on a different time period of the last 250,000 years, specifically the Last Glacial Period (70-50 ka, respectively; Chapter 2), the Late Holocene (3-2 ka; Chapter 3), the Last Interglacial Period (122-118 ka, respectively; Chapter 4), and the Penultimate Interglacial Period (230-218 ka, respectively; Chapter 5).
Download or read book Late Pleistocene and Holocene Climate Change in Southern Nevada written by Peter E. Wigand and published by . This book was released on 1987 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book North Pacific Environment and Paleoclimate from the Late Pleistocene to Present written by Miriam Jones and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
Download or read book New Mexico s Fossil Record 1 written by Spencer G. Lucas and published by New Mexico Museum of Natural History and Science. This book was released on 1997 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Assessment of Climatic Change During Late Wisconsin Time Southern Great Basin and Vicinity Arizona California and Nevada written by W. Geoffrey Spaulding and published by . This book was released on 1984 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
