The preservation of fossil leaves in Cretaceous volcaniclastic rocks from Alexander Island, Antarctica
Summary Leaf compression fossils are abundant within the lower Cretaceous part of the Fossil Bluff Formation in southern Alexander Island, Antarctica. They occur in lacustrine laminated siltstones with a high volcaniclastic component. During zeolite facies metamorphism of the rocks, breakdown of cla...
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Cambridge University Press (CUP)
1982
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Online Access: | http://dx.doi.org/10.1017/s0016756800026108 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756800026108 |
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crcambridgeupr:10.1017/s0016756800026108 2024-03-03T08:36:27+00:00 The preservation of fossil leaves in Cretaceous volcaniclastic rocks from Alexander Island, Antarctica Jefferson, T. H. 1982 http://dx.doi.org/10.1017/s0016756800026108 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756800026108 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Geological Magazine volume 119, issue 3, page 291-300 ISSN 0016-7568 1469-5081 Geology journal-article 1982 crcambridgeupr https://doi.org/10.1017/s0016756800026108 2024-02-08T08:35:39Z Summary Leaf compression fossils are abundant within the lower Cretaceous part of the Fossil Bluff Formation in southern Alexander Island, Antarctica. They occur in lacustrine laminated siltstones with a high volcaniclastic component. During zeolite facies metamorphism of the rocks, breakdown of clay minerals, volcanic glass and calcic plagioclase generated new mineral phases. The growth of these minerals was concentrated within and around leaves: finely disseminated oxide of titanium crystallized within the organic material, a thin film of chlorite was precipitated around leaves and silica, calcite and laumontite grew disruptively between leaf cuticles. Despite relatively low levels of organic maturation the structure of the leaf cuticles was destroyed and the only details which survived were those preserved as impressions in the chorite film. Article in Journal/Newspaper Alexander Island Antarc* Antarctica Cambridge University Press Alexander Island ENVELOPE(-69.895,-69.895,-71.287,-71.287) Fossil Bluff ENVELOPE(-68.274,-68.274,-71.332,-71.332) Geological Magazine 119 3 291 300 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
Geology |
spellingShingle |
Geology Jefferson, T. H. The preservation of fossil leaves in Cretaceous volcaniclastic rocks from Alexander Island, Antarctica |
topic_facet |
Geology |
description |
Summary Leaf compression fossils are abundant within the lower Cretaceous part of the Fossil Bluff Formation in southern Alexander Island, Antarctica. They occur in lacustrine laminated siltstones with a high volcaniclastic component. During zeolite facies metamorphism of the rocks, breakdown of clay minerals, volcanic glass and calcic plagioclase generated new mineral phases. The growth of these minerals was concentrated within and around leaves: finely disseminated oxide of titanium crystallized within the organic material, a thin film of chlorite was precipitated around leaves and silica, calcite and laumontite grew disruptively between leaf cuticles. Despite relatively low levels of organic maturation the structure of the leaf cuticles was destroyed and the only details which survived were those preserved as impressions in the chorite film. |
format |
Article in Journal/Newspaper |
author |
Jefferson, T. H. |
author_facet |
Jefferson, T. H. |
author_sort |
Jefferson, T. H. |
title |
The preservation of fossil leaves in Cretaceous volcaniclastic rocks from Alexander Island, Antarctica |
title_short |
The preservation of fossil leaves in Cretaceous volcaniclastic rocks from Alexander Island, Antarctica |
title_full |
The preservation of fossil leaves in Cretaceous volcaniclastic rocks from Alexander Island, Antarctica |
title_fullStr |
The preservation of fossil leaves in Cretaceous volcaniclastic rocks from Alexander Island, Antarctica |
title_full_unstemmed |
The preservation of fossil leaves in Cretaceous volcaniclastic rocks from Alexander Island, Antarctica |
title_sort |
preservation of fossil leaves in cretaceous volcaniclastic rocks from alexander island, antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
1982 |
url |
http://dx.doi.org/10.1017/s0016756800026108 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756800026108 |
long_lat |
ENVELOPE(-69.895,-69.895,-71.287,-71.287) ENVELOPE(-68.274,-68.274,-71.332,-71.332) |
geographic |
Alexander Island Fossil Bluff |
geographic_facet |
Alexander Island Fossil Bluff |
genre |
Alexander Island Antarc* Antarctica |
genre_facet |
Alexander Island Antarc* Antarctica |
op_source |
Geological Magazine volume 119, issue 3, page 291-300 ISSN 0016-7568 1469-5081 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0016756800026108 |
container_title |
Geological Magazine |
container_volume |
119 |
container_issue |
3 |
container_start_page |
291 |
op_container_end_page |
300 |
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1792506922312663040 |