Pliocene−Pleistocene incision of the Green River, Kentucky, determined from radioactive decay of cosmogenic 26Al and 10Be in Mammoth Cave sediments
Cosmogenic 26Al and 10Be in sediments washed into Mammoth Cave, Kentucky, record the history of 3.5 m.y. of water-table position, governed by incision and aggradation of the Green River, a tributary of the Ohio River. Upper levels of the cave formed during a period of slow river incision and were la...
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Geological Society of America
2001
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ftuglasgow:oai:eprints.gla.ac.uk:105545 2023-05-15T16:40:55+02:00 Pliocene−Pleistocene incision of the Green River, Kentucky, determined from radioactive decay of cosmogenic 26Al and 10Be in Mammoth Cave sediments Granger, Darryl E. Fabel, Derek Palmer, Arthur N. 2001 http://eprints.gla.ac.uk/105545/ unknown Geological Society of America Granger, D. E., Fabel, D. <http://eprints.gla.ac.uk/view/author/5585.html> and Palmer, A. N. (2001) Pliocene−Pleistocene incision of the Green River, Kentucky, determined from radioactive decay of cosmogenic 26Al and 10Be in Mammoth Cave sediments. Geological Society of America Bulletin <http://eprints.gla.ac.uk/view/journal_volume/Geological_Society_of_America_Bulletin.html>, 113(7), pp. 825-836. (doi:10.1130/0016-7606(2001)113<0825:PPIOTG>2.0.CO;2 <http://dx.doi.org/10.1130/0016-7606(2001)113<0825:PPIOTG>2.0.CO;2>) Articles PeerReviewed 2001 ftuglasgow https://doi.org/10.1130/0016-7606(2001)113<0825:PPIOTG>2.0.CO;2 2020-01-10T00:53:40Z Cosmogenic 26Al and 10Be in sediments washed into Mammoth Cave, Kentucky, record the history of 3.5 m.y. of water-table position, governed by incision and aggradation of the Green River, a tributary of the Ohio River. Upper levels of the cave formed during a period of slow river incision and were later filled with sediment due to river aggradation at 2.3–2.4 Ma. A brief surge of river incision ca. 2 Ma was followed by river stability and cave-passage formation at a lower level. Rapid incision through 15 m of bedrock ca. 1.5 Ma was prompted by repositioning of the Ohio River to its present course along an ice-sheet margin. Renewed incision ca. 1.2 Ma and aggradation at 0.7–0.8 Ma correlate with major ice advances in the Ohio River basin. Measurements of 26Al and 10Be also indicate that sandstone-capped uplands have maintained slow erosion rates of 2–7 m/m.y. for the past 3.5 m.y., despite accelerated Pleistocene river incision rates of ∼30 m/m.y. Article in Journal/Newspaper Ice Sheet University of Glasgow: Enlighten - Publications Slow River ENVELOPE(-100.834,-100.834,63.017,63.017) |
institution |
Open Polar |
collection |
University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
unknown |
description |
Cosmogenic 26Al and 10Be in sediments washed into Mammoth Cave, Kentucky, record the history of 3.5 m.y. of water-table position, governed by incision and aggradation of the Green River, a tributary of the Ohio River. Upper levels of the cave formed during a period of slow river incision and were later filled with sediment due to river aggradation at 2.3–2.4 Ma. A brief surge of river incision ca. 2 Ma was followed by river stability and cave-passage formation at a lower level. Rapid incision through 15 m of bedrock ca. 1.5 Ma was prompted by repositioning of the Ohio River to its present course along an ice-sheet margin. Renewed incision ca. 1.2 Ma and aggradation at 0.7–0.8 Ma correlate with major ice advances in the Ohio River basin. Measurements of 26Al and 10Be also indicate that sandstone-capped uplands have maintained slow erosion rates of 2–7 m/m.y. for the past 3.5 m.y., despite accelerated Pleistocene river incision rates of ∼30 m/m.y. |
format |
Article in Journal/Newspaper |
author |
Granger, Darryl E. Fabel, Derek Palmer, Arthur N. |
spellingShingle |
Granger, Darryl E. Fabel, Derek Palmer, Arthur N. Pliocene−Pleistocene incision of the Green River, Kentucky, determined from radioactive decay of cosmogenic 26Al and 10Be in Mammoth Cave sediments |
author_facet |
Granger, Darryl E. Fabel, Derek Palmer, Arthur N. |
author_sort |
Granger, Darryl E. |
title |
Pliocene−Pleistocene incision of the Green River, Kentucky, determined from radioactive decay of cosmogenic 26Al and 10Be in Mammoth Cave sediments |
title_short |
Pliocene−Pleistocene incision of the Green River, Kentucky, determined from radioactive decay of cosmogenic 26Al and 10Be in Mammoth Cave sediments |
title_full |
Pliocene−Pleistocene incision of the Green River, Kentucky, determined from radioactive decay of cosmogenic 26Al and 10Be in Mammoth Cave sediments |
title_fullStr |
Pliocene−Pleistocene incision of the Green River, Kentucky, determined from radioactive decay of cosmogenic 26Al and 10Be in Mammoth Cave sediments |
title_full_unstemmed |
Pliocene−Pleistocene incision of the Green River, Kentucky, determined from radioactive decay of cosmogenic 26Al and 10Be in Mammoth Cave sediments |
title_sort |
pliocene−pleistocene incision of the green river, kentucky, determined from radioactive decay of cosmogenic 26al and 10be in mammoth cave sediments |
publisher |
Geological Society of America |
publishDate |
2001 |
url |
http://eprints.gla.ac.uk/105545/ |
long_lat |
ENVELOPE(-100.834,-100.834,63.017,63.017) |
geographic |
Slow River |
geographic_facet |
Slow River |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
Granger, D. E., Fabel, D. <http://eprints.gla.ac.uk/view/author/5585.html> and Palmer, A. N. (2001) Pliocene−Pleistocene incision of the Green River, Kentucky, determined from radioactive decay of cosmogenic 26Al and 10Be in Mammoth Cave sediments. Geological Society of America Bulletin <http://eprints.gla.ac.uk/view/journal_volume/Geological_Society_of_America_Bulletin.html>, 113(7), pp. 825-836. (doi:10.1130/0016-7606(2001)113<0825:PPIOTG>2.0.CO;2 <http://dx.doi.org/10.1130/0016-7606(2001)113<0825:PPIOTG>2.0.CO;2>) |
op_doi |
https://doi.org/10.1130/0016-7606(2001)113<0825:PPIOTG>2.0.CO;2 |
_version_ |
1766031357626023936 |