Secondary precipitates in Pleistocene and present cryogenic environments (Mendoza Precordillera, Argentina, Transbaikalia, Siberia, and Seymour Island, Antarctica)
ABSTRACT Secondary precipitates (iron oxide, calcite, etc.) are currently observed in cold‐climate Pleistocene deposits. Some have micro‐ and ultrastructures quite different from precipitates of vadose, phreatic and biogenic origin, and seem to have originated by freezing processes. The microstructu...
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crwiley:10.1111/j.1365-3091.1996.tb01459.x 2024-09-15T17:44:25+00:00 Secondary precipitates in Pleistocene and present cryogenic environments (Mendoza Precordillera, Argentina, Transbaikalia, Siberia, and Seymour Island, Antarctica) VOGT, THEA CORTE, ARTURO E. 1996 http://dx.doi.org/10.1111/j.1365-3091.1996.tb01459.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-3091.1996.tb01459.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-3091.1996.tb01459.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Sedimentology volume 43, issue 1, page 53-64 ISSN 0037-0746 1365-3091 journal-article 1996 crwiley https://doi.org/10.1111/j.1365-3091.1996.tb01459.x 2024-07-25T04:22:29Z ABSTRACT Secondary precipitates (iron oxide, calcite, etc.) are currently observed in cold‐climate Pleistocene deposits. Some have micro‐ and ultrastructures quite different from precipitates of vadose, phreatic and biogenic origin, and seem to have originated by freezing processes. The microstructures of calcite coatings from a Pleistocene cryopediment in the Mendoza Pre‐Cordillera, from a Lower Pleistocene cryogenic slope deposit in Western Transbaikalia and from the present active layer in Antarctica are described. They show similar patterns: fibrous crystals often consisting of piles of platelets, some with internal holes, assembled in millimetre‐scale fringes on the lower face of clasts. Observational (mainly fabric) evidence confirms that such peculiar crystals are formed during freezing. The features are unknown in other climates and, when found in past sediments, can be diagnostic of cryogenic palaeoenvironments. Article in Journal/Newspaper Antarc* Antarctica Seymour Island Siberia Wiley Online Library Sedimentology 43 1 53 64 |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
ABSTRACT Secondary precipitates (iron oxide, calcite, etc.) are currently observed in cold‐climate Pleistocene deposits. Some have micro‐ and ultrastructures quite different from precipitates of vadose, phreatic and biogenic origin, and seem to have originated by freezing processes. The microstructures of calcite coatings from a Pleistocene cryopediment in the Mendoza Pre‐Cordillera, from a Lower Pleistocene cryogenic slope deposit in Western Transbaikalia and from the present active layer in Antarctica are described. They show similar patterns: fibrous crystals often consisting of piles of platelets, some with internal holes, assembled in millimetre‐scale fringes on the lower face of clasts. Observational (mainly fabric) evidence confirms that such peculiar crystals are formed during freezing. The features are unknown in other climates and, when found in past sediments, can be diagnostic of cryogenic palaeoenvironments. |
format |
Article in Journal/Newspaper |
author |
VOGT, THEA CORTE, ARTURO E. |
spellingShingle |
VOGT, THEA CORTE, ARTURO E. Secondary precipitates in Pleistocene and present cryogenic environments (Mendoza Precordillera, Argentina, Transbaikalia, Siberia, and Seymour Island, Antarctica) |
author_facet |
VOGT, THEA CORTE, ARTURO E. |
author_sort |
VOGT, THEA |
title |
Secondary precipitates in Pleistocene and present cryogenic environments (Mendoza Precordillera, Argentina, Transbaikalia, Siberia, and Seymour Island, Antarctica) |
title_short |
Secondary precipitates in Pleistocene and present cryogenic environments (Mendoza Precordillera, Argentina, Transbaikalia, Siberia, and Seymour Island, Antarctica) |
title_full |
Secondary precipitates in Pleistocene and present cryogenic environments (Mendoza Precordillera, Argentina, Transbaikalia, Siberia, and Seymour Island, Antarctica) |
title_fullStr |
Secondary precipitates in Pleistocene and present cryogenic environments (Mendoza Precordillera, Argentina, Transbaikalia, Siberia, and Seymour Island, Antarctica) |
title_full_unstemmed |
Secondary precipitates in Pleistocene and present cryogenic environments (Mendoza Precordillera, Argentina, Transbaikalia, Siberia, and Seymour Island, Antarctica) |
title_sort |
secondary precipitates in pleistocene and present cryogenic environments (mendoza precordillera, argentina, transbaikalia, siberia, and seymour island, antarctica) |
publisher |
Wiley |
publishDate |
1996 |
url |
http://dx.doi.org/10.1111/j.1365-3091.1996.tb01459.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-3091.1996.tb01459.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-3091.1996.tb01459.x |
genre |
Antarc* Antarctica Seymour Island Siberia |
genre_facet |
Antarc* Antarctica Seymour Island Siberia |
op_source |
Sedimentology volume 43, issue 1, page 53-64 ISSN 0037-0746 1365-3091 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-3091.1996.tb01459.x |
container_title |
Sedimentology |
container_volume |
43 |
container_issue |
1 |
container_start_page |
53 |
op_container_end_page |
64 |
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1810491990873210880 |