The Sirius Passet Lagerstatte : silica death masking opens the window on the earliest matground community of the Cambrian explosion.
The Sirius Passet Lagerstätte (SP), Peary Land, North Greenland, occurs in black slates deposited at or just below storm wave base. It represents the earliest Cambrian microbial mat community with exceptional preservation, predating the Burgess Shale by 10 million years. Trilobites from the SP are p...
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John Wiley
2016
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Online Access: | http://dro.dur.ac.uk/18878/ http://dro.dur.ac.uk/18878/1/18878.pdf http://dro.dur.ac.uk/18878/2/18878P.pdf https://doi.org/10.1111/let.12174 |
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:18878 2023-05-15T16:29:06+02:00 The Sirius Passet Lagerstatte : silica death masking opens the window on the earliest matground community of the Cambrian explosion. Strang, K.M. Armstrong, H.A. Harper, D.A.T. Trabucho-Alexandre, João P. 2016-10-01 application/pdf http://dro.dur.ac.uk/18878/ http://dro.dur.ac.uk/18878/1/18878.pdf http://dro.dur.ac.uk/18878/2/18878P.pdf https://doi.org/10.1111/let.12174 unknown John Wiley dro:18878 issn:0024-1164 issn: 1502-3931 doi:10.1111/let.12174 http://dro.dur.ac.uk/18878/ http://dx.doi.org/10.1111/let.12174 http://dro.dur.ac.uk/18878/1/18878.pdf http://dro.dur.ac.uk/18878/2/18878P.pdf © 2016 The Authors Lethaia published by John Wiley & Sons Ltd on behalf of Lethaia Foundation. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Lethaia, 2016, Vol.49(4), pp.631-643 [Peer Reviewed Journal] Article PeerReviewed 2016 ftunivdurham https://doi.org/10.1111/let.12174 2020-05-28T22:35:03Z The Sirius Passet Lagerstätte (SP), Peary Land, North Greenland, occurs in black slates deposited at or just below storm wave base. It represents the earliest Cambrian microbial mat community with exceptional preservation, predating the Burgess Shale by 10 million years. Trilobites from the SP are preserved as complete, three-dimensional, concave hyporelief external moulds and convex epirelief casts. External moulds are shown to consist of a thin veneer of authigenic silica. The casts are formed from silicified cyanobacterial mat material. Silicification in both cases occurred shortly after death within benthic cyanobacterial mats. Pore waters were alkali, silica-saturated, high in ferric iron but low in oxygen and sulphate. Excess silica was likely derived from remobilized biogenic silica. The remarkable siliceous death mask preservation opens a new window on the environment and location of the Cambrian Explosion. This window closed with the appearance of abundant mat grazers later as the Cambrian Explosion intensified. Article in Journal/Newspaper Greenland North Greenland Peary Land Durham University: Durham Research Online Burgess ENVELOPE(76.128,76.128,-69.415,-69.415) Greenland Peary ENVELOPE(-63.867,-63.867,-65.250,-65.250) Peary Land ENVELOPE(-32.500,-32.500,82.633,82.633) Sirius ENVELOPE(163.250,163.250,-84.133,-84.133) Lethaia 49 4 631 643 |
institution |
Open Polar |
collection |
Durham University: Durham Research Online |
op_collection_id |
ftunivdurham |
language |
unknown |
description |
The Sirius Passet Lagerstätte (SP), Peary Land, North Greenland, occurs in black slates deposited at or just below storm wave base. It represents the earliest Cambrian microbial mat community with exceptional preservation, predating the Burgess Shale by 10 million years. Trilobites from the SP are preserved as complete, three-dimensional, concave hyporelief external moulds and convex epirelief casts. External moulds are shown to consist of a thin veneer of authigenic silica. The casts are formed from silicified cyanobacterial mat material. Silicification in both cases occurred shortly after death within benthic cyanobacterial mats. Pore waters were alkali, silica-saturated, high in ferric iron but low in oxygen and sulphate. Excess silica was likely derived from remobilized biogenic silica. The remarkable siliceous death mask preservation opens a new window on the environment and location of the Cambrian Explosion. This window closed with the appearance of abundant mat grazers later as the Cambrian Explosion intensified. |
format |
Article in Journal/Newspaper |
author |
Strang, K.M. Armstrong, H.A. Harper, D.A.T. Trabucho-Alexandre, João P. |
spellingShingle |
Strang, K.M. Armstrong, H.A. Harper, D.A.T. Trabucho-Alexandre, João P. The Sirius Passet Lagerstatte : silica death masking opens the window on the earliest matground community of the Cambrian explosion. |
author_facet |
Strang, K.M. Armstrong, H.A. Harper, D.A.T. Trabucho-Alexandre, João P. |
author_sort |
Strang, K.M. |
title |
The Sirius Passet Lagerstatte : silica death masking opens the window on the earliest matground community of the Cambrian explosion. |
title_short |
The Sirius Passet Lagerstatte : silica death masking opens the window on the earliest matground community of the Cambrian explosion. |
title_full |
The Sirius Passet Lagerstatte : silica death masking opens the window on the earliest matground community of the Cambrian explosion. |
title_fullStr |
The Sirius Passet Lagerstatte : silica death masking opens the window on the earliest matground community of the Cambrian explosion. |
title_full_unstemmed |
The Sirius Passet Lagerstatte : silica death masking opens the window on the earliest matground community of the Cambrian explosion. |
title_sort |
sirius passet lagerstatte : silica death masking opens the window on the earliest matground community of the cambrian explosion. |
publisher |
John Wiley |
publishDate |
2016 |
url |
http://dro.dur.ac.uk/18878/ http://dro.dur.ac.uk/18878/1/18878.pdf http://dro.dur.ac.uk/18878/2/18878P.pdf https://doi.org/10.1111/let.12174 |
long_lat |
ENVELOPE(76.128,76.128,-69.415,-69.415) ENVELOPE(-63.867,-63.867,-65.250,-65.250) ENVELOPE(-32.500,-32.500,82.633,82.633) ENVELOPE(163.250,163.250,-84.133,-84.133) |
geographic |
Burgess Greenland Peary Peary Land Sirius |
geographic_facet |
Burgess Greenland Peary Peary Land Sirius |
genre |
Greenland North Greenland Peary Land |
genre_facet |
Greenland North Greenland Peary Land |
op_source |
Lethaia, 2016, Vol.49(4), pp.631-643 [Peer Reviewed Journal] |
op_relation |
dro:18878 issn:0024-1164 issn: 1502-3931 doi:10.1111/let.12174 http://dro.dur.ac.uk/18878/ http://dx.doi.org/10.1111/let.12174 http://dro.dur.ac.uk/18878/1/18878.pdf http://dro.dur.ac.uk/18878/2/18878P.pdf |
op_rights |
© 2016 The Authors Lethaia published by John Wiley & Sons Ltd on behalf of Lethaia Foundation. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1111/let.12174 |
container_title |
Lethaia |
container_volume |
49 |
container_issue |
4 |
container_start_page |
631 |
op_container_end_page |
643 |
_version_ |
1766018781897818112 |