Comparative Taphonomy and Paleoecology of a Glaciomarine Fauna, Carboniferous (Westphalian- Namurian) La Capilla Fm., Argentina
The Carboniferous La Capilla Fm. of the Calingasta-Uspallata basin of western Argentina contains a low diversity fauna inhabiting a continental shelf under glacial ice fronts advancing from the east. Distal glaciomarine sediments on these ice-influenced shelves of Gondwana are most commonly interpre...
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ftolddominionuni:oai:digitalcommons.odu.edu:vjs-1355 2024-09-15T17:42:24+00:00 Comparative Taphonomy and Paleoecology of a Glaciomarine Fauna, Carboniferous (Westphalian- Namurian) La Capilla Fm., Argentina Hanger, Rex A. Gabadirwe, Mohutsiwa 1999-10-01T07:00:00Z application/pdf https://digitalcommons.odu.edu/vjs/vol50/iss3/3 https://doi.org/10.25778/njqg-bj59 https://digitalcommons.odu.edu/context/vjs/article/1355/viewcontent/1999_Hanger_Comparative_Taphonomy_V50_N3_259_ocr.pdf unknown ODU Digital Commons https://digitalcommons.odu.edu/vjs/vol50/iss3/3 doi:10.25778/njqg-bj59 https://digitalcommons.odu.edu/context/vjs/article/1355/viewcontent/1999_Hanger_Comparative_Taphonomy_V50_N3_259_ocr.pdf Virginia Journal of Science Taphonomy Western Argentina Gondwana La Capilla Fm Fossil Taxa Valve ratios Biodiversity Evolution article 1999 ftolddominionuni https://doi.org/10.25778/njqg-bj59 2024-08-12T03:29:34Z The Carboniferous La Capilla Fm. of the Calingasta-Uspallata basin of western Argentina contains a low diversity fauna inhabiting a continental shelf under glacial ice fronts advancing from the east. Distal glaciomarine sediments on these ice-influenced shelves of Gondwana are most commonly interpreted as being deposited under quiet, low-energy conditions. TaÂphonomic and paleoecologic analysis of a sample of the fauna reveals the following: low species richness, yet comparable equitability to coeval, tropiÂcal faunas; low articulation ratios and high pedicle valve dominance for brachiopods; diverse corrasion modes, about half relatively high categories; one hundred percent fracturing of brachiopod shells, with carinate fracture types dominant, and no evidence of epibiont coverage ofbrach.iopod shells, despite presence of encrusting organisms in the fauna. Collectively, the data indicate long residence time on the seafloor, with strong episodes of reworkÂing - contrary to the low-energy hypothesis. Modem analogues of continental shelves reworked by currents to depths of 250 meters exist in Antarctica. The existence of similarly preserved faunas in the coeval, marginal basins of southern Gondwana needs to be confirmed. Article in Journal/Newspaper Antarc* Antarctica Old Dominion University: ODU Digital Commons |
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Open Polar |
collection |
Old Dominion University: ODU Digital Commons |
op_collection_id |
ftolddominionuni |
language |
unknown |
topic |
Taphonomy Western Argentina Gondwana La Capilla Fm Fossil Taxa Valve ratios Biodiversity Evolution |
spellingShingle |
Taphonomy Western Argentina Gondwana La Capilla Fm Fossil Taxa Valve ratios Biodiversity Evolution Hanger, Rex A. Gabadirwe, Mohutsiwa Comparative Taphonomy and Paleoecology of a Glaciomarine Fauna, Carboniferous (Westphalian- Namurian) La Capilla Fm., Argentina |
topic_facet |
Taphonomy Western Argentina Gondwana La Capilla Fm Fossil Taxa Valve ratios Biodiversity Evolution |
description |
The Carboniferous La Capilla Fm. of the Calingasta-Uspallata basin of western Argentina contains a low diversity fauna inhabiting a continental shelf under glacial ice fronts advancing from the east. Distal glaciomarine sediments on these ice-influenced shelves of Gondwana are most commonly interpreted as being deposited under quiet, low-energy conditions. TaÂphonomic and paleoecologic analysis of a sample of the fauna reveals the following: low species richness, yet comparable equitability to coeval, tropiÂcal faunas; low articulation ratios and high pedicle valve dominance for brachiopods; diverse corrasion modes, about half relatively high categories; one hundred percent fracturing of brachiopod shells, with carinate fracture types dominant, and no evidence of epibiont coverage ofbrach.iopod shells, despite presence of encrusting organisms in the fauna. Collectively, the data indicate long residence time on the seafloor, with strong episodes of reworkÂing - contrary to the low-energy hypothesis. Modem analogues of continental shelves reworked by currents to depths of 250 meters exist in Antarctica. The existence of similarly preserved faunas in the coeval, marginal basins of southern Gondwana needs to be confirmed. |
format |
Article in Journal/Newspaper |
author |
Hanger, Rex A. Gabadirwe, Mohutsiwa |
author_facet |
Hanger, Rex A. Gabadirwe, Mohutsiwa |
author_sort |
Hanger, Rex A. |
title |
Comparative Taphonomy and Paleoecology of a Glaciomarine Fauna, Carboniferous (Westphalian- Namurian) La Capilla Fm., Argentina |
title_short |
Comparative Taphonomy and Paleoecology of a Glaciomarine Fauna, Carboniferous (Westphalian- Namurian) La Capilla Fm., Argentina |
title_full |
Comparative Taphonomy and Paleoecology of a Glaciomarine Fauna, Carboniferous (Westphalian- Namurian) La Capilla Fm., Argentina |
title_fullStr |
Comparative Taphonomy and Paleoecology of a Glaciomarine Fauna, Carboniferous (Westphalian- Namurian) La Capilla Fm., Argentina |
title_full_unstemmed |
Comparative Taphonomy and Paleoecology of a Glaciomarine Fauna, Carboniferous (Westphalian- Namurian) La Capilla Fm., Argentina |
title_sort |
comparative taphonomy and paleoecology of a glaciomarine fauna, carboniferous (westphalian- namurian) la capilla fm., argentina |
publisher |
ODU Digital Commons |
publishDate |
1999 |
url |
https://digitalcommons.odu.edu/vjs/vol50/iss3/3 https://doi.org/10.25778/njqg-bj59 https://digitalcommons.odu.edu/context/vjs/article/1355/viewcontent/1999_Hanger_Comparative_Taphonomy_V50_N3_259_ocr.pdf |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Virginia Journal of Science |
op_relation |
https://digitalcommons.odu.edu/vjs/vol50/iss3/3 doi:10.25778/njqg-bj59 https://digitalcommons.odu.edu/context/vjs/article/1355/viewcontent/1999_Hanger_Comparative_Taphonomy_V50_N3_259_ocr.pdf |
op_doi |
https://doi.org/10.25778/njqg-bj59 |
_version_ |
1810488973270712320 |