Moraine chronosequence of the Donnelly Dome region, Alaska
نویسندگان
چکیده
a Institute of Earth Sciences, Hebrew University of Jerusalem, Jerusalem 91904, Israel b Department of Geology, University at Buffalo, Buffalo, NY 14260, USA c CARVER GEOLOGIC Inc., PO Box 52, 12021 Middle Bay Drive, Kodiak, AK 99615, USA d Department of Geology and School of Natural Resources, University of Vermont, Burlington, VT 05405, USA e Earth and Planetary Science Department, University of California, Berkeley, CA 94720, USA f Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, USA
منابع مشابه
Glacier readvance during the late glacial (Younger Dryas?) in the Ahklun Mountains, southwestern Alaska
An expansion of alpine glaciers during the latest Pleistocene produced an extraordinarily well defined end moraine system in the Ahklun Mountains, southwestern Alaska. These moraines, deposited during the Mount Waskey advance, are several kilometers beyond modern glacier termini, and ;80 km upvalley of the late Wisconsin Ahklun Mountains ice cap terminal moraine. Eleven cosmogenic 10Be and 26Al...
متن کاملPatterns of early lake evolution in boreal landscapes: a comparison of stratigraphic inferences with a modern chronosequence in Glacier Bay, Alaska
The chronosequence approach, which infers temporal patterns of environmental change from a spatial array of modern sites, has been a major tool for studying successional processes. A model of early lake ontogeny in boreal landscapes, developed from a chronosequence of lakes in Alaska, suggests that long-term soil development and related hydrological change produce a loss of alkalinity and base ...
متن کاملPaleogeographic Significance of Middle Pleistocene Glaciomarine Deposits on Baldwin Peninsula, Northwest Alaska
Baldwin Peninsula, northwest Alaska, is a middle Pleistocene push-moraine complex composed of marine, fluvial, and glaciogenic sediments. The peninsula was formed by three ice lobes emanating from the De Long and Baird mountains and the Selawik Lowlands in the southwest Brooks Range during the Anaktuvuk River glaciation . This glaciation was nearly an order of magnitude more areally extensive t...
متن کاملLate Pleistocene and Holocene glaciation of the Fish Lake valley, northeastern Alaska Range, Alaska
We reconstructed a chronology of glaciation spanning from the Late Pleistocene through the late Holocene for Fish Lake valley in the north-eastern Alaska Range using Be surface exposure dating and lichenometry. After it attained its maximum late Wisconsin extent, the Fish Lake valley glacier began to retreat ca. 16.5 ka, and then experienced a readvance or standstill at 11.6 0.3 ka. Evidence of...
متن کاملLate Pleistocene mountain glaciation in Alaska: key chronologies
Moraine sequences of mountain glaciers can be used to infer spatial and temporal patterns of climate change across the globe. Alaska is an accessible high-latitude location in the Northern Hemisphere and contains a rich record of alpine glaciation. Here, we highlight the key chronologies from three mountain ranges in Alaska that reveal the timing and spatial extent of Late Pleistocene glaciatio...
متن کامل