Portal de Periódicos da CAPES

Late Paleozoic Glaciation: Part III, Antarctica

1971; Geological Society of America; Volume: 82; Issue: 6 Linguagem: Inglês

10.1130/0016-7606(1971)82[1581

1943-2674

Lawrence A. Frakes, J. L. Matthews, John C. Crowell,

Cryospheric studies and observations

Research Article| June 01, 1971 Late Paleozoic Glaciation: Part III, Antarctica LAWRENCE A FRAKES; LAWRENCE A FRAKES Department of Geology, Florida State University, Tallahassee, Florida 32306 Search for other works by this author on: GSW Google Scholar JERRY L MATTHEWS; JERRY L MATTHEWS Department of Oceanography, University of California, San Diego, California 92037 Search for other works by this author on: GSW Google Scholar JOHN C CROWELL JOHN C CROWELL Department of Geological Sciences, University of California, Santa Barbara, California 93106 Search for other works by this author on: GSW Google Scholar GSA Bulletin (1971) 82 (6): 1581–1604. https://doi.org/10.1130/0016-7606(1971)82[1581:LPGPIA]2.0.CO;2 Article history received: 29 Jun 1970 rev-recd: 30 Dec 1970 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation LAWRENCE A FRAKES, JERRY L MATTHEWS, JOHN C CROWELL; Late Paleozoic Glaciation: Part III, Antarctica. GSA Bulletin 1971;; 82 (6): 1581–1604. doi: https://doi.org/10.1130/0016-7606(1971)82[1581:LPGPIA]2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Like other Gondwanaland fragments, Antarctica was glaciated during the late Paleozoic, as demonstrated by striated floors and boulder pavements and by glacially striated clasts in diamictites and associated varvelike strata. Tillites are known throughout the Transantarctic Mountains from the vicinity of Ross Island to the Pensacola Mountains, as well as in the Ells-worth Mountains in West Antarctica. These strata apparently were laid down in three basins (Ellsworth-Pensacola basin, Horlick-Queen Maud basin, and Beard more basin).Ice flowed into the Ellsworth-Pensacola basin from a major center located in the region of the eastern Weddell Sea, possibly beginning in the early Carboniferous. The Thiel salient, separating the Ellsworth-Pensacola and Horlick-Queen Maud basins, yielded some debris northward into the former basin but served primarily as a major gathering ground for ice which flowed westward into the Horlick-Queen Maud basin. Similarly, the western Queen Maud Mountains, where tillites are thin or absent, was a local center for ice flowing eastward into the Horlick-Queen Maud basin and probably westward into the Beardmore basin, although the latter direction is not yet proven by striae patterns. A major center of ice accumulation also seems to have existed in northern Victoria Land, whence flow was toward the southeast. The Ellsworth-Pensacola basin was a continuously depressed Paleozoic downwarp of major proportions, whereas the Permian Horlick-Queen Maud and Beard-more basins were shallow depressions and possibly connected.The center of late Paleozoic glaciation may have migrated across Antarctica from the Wed-dell Sea region (early Carboniferous) to northern Victoria Land (Permian), judging from the meager paleontological data and stratigraphic considerations. This would be in keeping with the relative-motion curves of the paleomagnetic poles for the reconstructed Gondwana-land fragments of South America, Africa, and Antarctica, the late Paleozoic segments of which cross Antarctica from the Weddell Sea to Victoria land. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.