Lower Cambrian halkieriids from Oxfordshire, UK
Lower Cambrian sediments from the Withycombe Farm borehole (Oxfordshire) yield isolated halkieriid sclerites. All bear prominent ridges, and most appear to be either cultrates or palmates, although distinction between the two in the available material is generally difficult. Two other sclerites are...
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Cambridge University Press (CUP)
1998
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Online Access: | http://dx.doi.org/10.1017/s0016756898001198 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756898001198 |
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crcambridgeupr:10.1017/s0016756898001198 2024-03-03T08:45:01+00:00 Lower Cambrian halkieriids from Oxfordshire, UK CONWAY MORRIS, S. McILROY, D. RUSHTON, A. W. A. 1998 http://dx.doi.org/10.1017/s0016756898001198 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756898001198 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Geological Magazine volume 135, issue 4, page 501-508 ISSN 0016-7568 1469-5081 Geology journal-article 1998 crcambridgeupr https://doi.org/10.1017/s0016756898001198 2024-02-08T08:36:11Z Lower Cambrian sediments from the Withycombe Farm borehole (Oxfordshire) yield isolated halkieriid sclerites. All bear prominent ridges, and most appear to be either cultrates or palmates, although distinction between the two in the available material is generally difficult. Two other sclerites are more elongate: one may represent a spinose sclerite, while the other is possibly derived from the siculate zone of the original scleritome. Adjacent horizons of the Withycombe Formation yield disc-like fossils, superficially similar to hyolith opercula or monoplacophorans. These are tentatively identified as deriving from the same halkieriid scleritome. Two main types are identified, and these may correspond to the anterior and posterior shells of Halkieria evangelista from the lower Cambrian Sirius Passet fauna of North Greenland. The age of the Withycombe Formation within the Cambrian is not entirely resolved, but faunal evidence suggests an equivalence to the Cuslett Formation of southeast Newfoundland, which corresponds to either the upper Tommotian or lower Atdabanian of the standard Siberian section. Article in Journal/Newspaper Greenland Newfoundland North Greenland Cambridge University Press Greenland Sirius ENVELOPE(163.250,163.250,-84.133,-84.133) Geological Magazine 135 4 501 508 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology |
spellingShingle |
Geology CONWAY MORRIS, S. McILROY, D. RUSHTON, A. W. A. Lower Cambrian halkieriids from Oxfordshire, UK |
topic_facet |
Geology |
description |
Lower Cambrian sediments from the Withycombe Farm borehole (Oxfordshire) yield isolated halkieriid sclerites. All bear prominent ridges, and most appear to be either cultrates or palmates, although distinction between the two in the available material is generally difficult. Two other sclerites are more elongate: one may represent a spinose sclerite, while the other is possibly derived from the siculate zone of the original scleritome. Adjacent horizons of the Withycombe Formation yield disc-like fossils, superficially similar to hyolith opercula or monoplacophorans. These are tentatively identified as deriving from the same halkieriid scleritome. Two main types are identified, and these may correspond to the anterior and posterior shells of Halkieria evangelista from the lower Cambrian Sirius Passet fauna of North Greenland. The age of the Withycombe Formation within the Cambrian is not entirely resolved, but faunal evidence suggests an equivalence to the Cuslett Formation of southeast Newfoundland, which corresponds to either the upper Tommotian or lower Atdabanian of the standard Siberian section. |
format |
Article in Journal/Newspaper |
author |
CONWAY MORRIS, S. McILROY, D. RUSHTON, A. W. A. |
author_facet |
CONWAY MORRIS, S. McILROY, D. RUSHTON, A. W. A. |
author_sort |
CONWAY MORRIS, S. |
title |
Lower Cambrian halkieriids from Oxfordshire, UK |
title_short |
Lower Cambrian halkieriids from Oxfordshire, UK |
title_full |
Lower Cambrian halkieriids from Oxfordshire, UK |
title_fullStr |
Lower Cambrian halkieriids from Oxfordshire, UK |
title_full_unstemmed |
Lower Cambrian halkieriids from Oxfordshire, UK |
title_sort |
lower cambrian halkieriids from oxfordshire, uk |
publisher |
Cambridge University Press (CUP) |
publishDate |
1998 |
url |
http://dx.doi.org/10.1017/s0016756898001198 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756898001198 |
long_lat |
ENVELOPE(163.250,163.250,-84.133,-84.133) |
geographic |
Greenland Sirius |
geographic_facet |
Greenland Sirius |
genre |
Greenland Newfoundland North Greenland |
genre_facet |
Greenland Newfoundland North Greenland |
op_source |
Geological Magazine volume 135, issue 4, page 501-508 ISSN 0016-7568 1469-5081 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0016756898001198 |
container_title |
Geological Magazine |
container_volume |
135 |
container_issue |
4 |
container_start_page |
501 |
op_container_end_page |
508 |
_version_ |
1792500535097556992 |