Paleo And Environmental Magnetic Investigations In The Appalachians Of Pennsylvania PDF Download
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Author | : Maria Thérèse Cioppa |
Publisher | : |
Total Pages | : 356 |
Release | : 1996 |
Genre | : Appalachian Mountains |
ISBN | : |
Download Paleo-and Environmental Magnetic Investigations in the Appalachians of Pennsylvania Book in PDF, ePub and Kindle
Paleosecular variation, mineral magnetic, magnetic fabric and $\sp{14}$C studies were carried out in three lakes in Pennsylvania. In Lake Waynewood, a clear record of watershed changes over the past 3700 years BP is available. Prior to 2700 BP, little evidence of allogenic influx is present, whereas, at 2700 yrs BP, the magnetic mineralogy and the magnetic fabric suggest allogenic sources for the magnetic minerals. Between 2700 and 1900 yrs BP, major changes in mineral magnetic properties suggest an interval of instability in the watershed. Conditions were more stable between 1900 and 100 yrs BP, and at 100 yrs BP, the effects of clearcutting are apparent. Similar studies were carried out in Lakes Lacawac and Giles. In all three lakes, a sharp change in mineral magnetic properties, most notably a drop in the ferrimagnetic content of the sediments, is seen $\sim$1800-1900 yrs BP. The change in mineral magnetic properties is consistent with increased input of antiferromagnetic minerals (goethite or hematite), implying that all three lakes were responding to a regional or global climate event causing increased erosion.
Author | : Geological Survey (U.S.) |
Publisher | : |
Total Pages | : 476 |
Release | : 1980 |
Genre | : Geology |
ISBN | : |
Download Geological Survey Research, 1980 Book in PDF, ePub and Kindle
Author | : Philip Fisk Ong |
Publisher | : |
Total Pages | : 47 |
Release | : 2004 |
Genre | : Morphotectonics |
ISBN | : |
Download Early Rotation in the Pennsylvania Salient (US Appalachians) Book in PDF, ePub and Kindle
Author | : Dann Jack Spariosu |
Publisher | : |
Total Pages | : 584 |
Release | : 1984 |
Genre | : Geology |
ISBN | : |
Download Paleomagnetic Investigations of Northern Appalachian Terrane History During the Middle to Late Paleozoic Book in PDF, ePub and Kindle
Author | : Geological Survey (U.S.) |
Publisher | : |
Total Pages | : 414 |
Release | : 1982 |
Genre | : Geology |
ISBN | : |
Download Geological Survey Professional Paper Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 306 |
Release | : 1984 |
Genre | : |
ISBN | : |
Download U.S. Geological Survey Professional Paper Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 248 |
Release | : 1988 |
Genre | : Geology |
ISBN | : |
Download List of U.S. Geological Survey Geologic and Water-supply Reports and Maps for Pennsylvania and New Jersey Book in PDF, ePub and Kindle
Author | : Pierre de Béthune |
Publisher | : |
Total Pages | : 0 |
Release | : 1948 |
Genre | : Geology |
ISBN | : |
Download Geomorphic Studies in the Appalachians of Pennsylvania Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 450 |
Release | : 1979 |
Genre | : Geology |
ISBN | : |
Download The Mississippian and Pennsylvanian (Carboniferous) Systems in the United States Book in PDF, ePub and Kindle
Author | : Geological Survey (U.S.) |
Publisher | : |
Total Pages | : 480 |
Release | : 1978 |
Genre | : Astrogeology |
ISBN | : |
Download Geological Survey Research 1978 Book in PDF, ePub and Kindle
A summary of recent significant scientific and economic results accompanied by a list of geologic and hydrologic investigations in progress and a report on the status of topographic mapping.