نتایج جستجو برای: glacial erosion
تعداد نتایج: 41285 فیلتر نتایج به سال:
Understanding the stability of the early Antarctic ice cap in the geological past is of societal interest because present-day atmospheric CO2 concentrations have reached values comparable to those estimated for the Oligocene and the Early Miocene epochs. Here we analyze a new high-resolution deep-sea oxygen isotope (δ18O) record from the South Atlantic Ocean spanning an interval between 30.1 My...
This manuscript details magnetic mineral measurements from the sediments of Lake Ohrid, which serves as proxies for paleoenvironmental and paleoclimatic change. The new cores from Lake Ohrid comprise one of the longest continuous records from Europe, and the analyses and submission advance our understanding of the regional glacial-interglacial climate and environmental history. In particular, t...
Late Neogene paleoceanographic history in the western North Pacific is discussed on the basis of: (1) Td (diatom temperature) values, (2) species composition, and (3) the structure of diatom assemblages at Sites 579 and 580. These factors provide a record of fluctuations of the past position of the subarctic-subtropic front because these sites lie within the transition zone between the modern d...
The high alpine valleys in the Southem Pyrenees are characterised by a many small lakes and ponds. They occur above 2000 m and are said to have been formed by glacial erosion. The sediments in these basins should, therefore, contain s t p tigraphic information since deglaciation, at least. An interesting and may be one of the most important of these basins is Lake Llauset in the Alta Ribagorca....
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