Diatom mats in Gulf of California sediments: Implications for the paleoenvironmental interpretation of laminated sediments and silica burial
Preservation of laminations in hemipelagic and pelagic sediments is routinely attributed to reduced oxygen conditions that inhibited benthic activity. As such, the degree of preservation of laminae is used commonly as a paleo-oxygenation indicator. Recent evidence from deep-sea pelagic sediments in...
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Geological Society of America
1999
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:9482 2023-05-15T17:33:02+02:00 Diatom mats in Gulf of California sediments: Implications for the paleoenvironmental interpretation of laminated sediments and silica burial Pike, Jennifer Kemp, Alan E. S. 1999 https://orca.cardiff.ac.uk/id/eprint/9482/ https://doi.org/10.1130/0091-7613(1999)027<0311:DMIGOC>2.3.CO;2 https://doi.org/10.1130/0091-7613(1999)0270311:DMIGOC2.3.CO;2 unknown Geological Society of America Pike, Jennifer https://orca.cardiff.ac.uk/view/cardiffauthors/A0179070.html orcid:0000-0001-9415-6003 orcid:0000-0001-9415-6003 and Kemp, Alan E. S. 1999. Diatom mats in Gulf of California sediments: Implications for the paleoenvironmental interpretation of laminated sediments and silica burial. Geology 27 (4) , pp. 311-314. 10.1130/0091-7613(1999)0270311:DMIGOC2.3.CO;2 https://doi.org/10.1130/0091-7613%281999%29027%3C0311%3ADMIGOC%3E2.3.CO%3B2 doi:10.1130/0091-7613(1999)0270311:DMIGOC2.3.CO;2 QE Geology Article PeerReviewed 1999 ftunivcardiff https://doi.org/10.1130/0091-7613(1999)027<0311:DMIGOC>2.3.CO;2 https://doi.org/10.1130/0091-7613(1999)0270311:DMIGOC2.3.CO;2 2022-10-20T22:34:04Z Preservation of laminations in hemipelagic and pelagic sediments is routinely attributed to reduced oxygen conditions that inhibited benthic activity. As such, the degree of preservation of laminae is used commonly as a paleo-oxygenation indicator. Recent evidence from deep-sea pelagic sediments in the eastern equatorial Pacific and North Atlantic, however, demonstrates that preservation of laminae may occur by rapid deposition of ungrazed Thalassiothrix longissima diatom mats that overwhelm the benthos in otherwise oxic bottom waters. Here, we report that similar diatom mat laminae are common in hemipelagic sediments of the Guaymas Basin in the Gulf of California, have aided preservation of the laminated sediment sequence and have also enhanced opal burial. Examples of diatom mats influencing sediment preservation are also described from the northern California Margin and from the Miocene Monterey Formation, southern California. Thus, even in classical settings of laminated sediment occurrence, caution needs to be taken in correlating degree of lamina preservation with paleo-oxygen levels. Such studies must be underpinned by detailed microfabric and micropaleontological analyses. Article in Journal/Newspaper North Atlantic Cardiff University: ORCA (Online Research @ Cardiff) Pacific |
institution |
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collection |
Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
unknown |
topic |
QE Geology |
spellingShingle |
QE Geology Pike, Jennifer Kemp, Alan E. S. Diatom mats in Gulf of California sediments: Implications for the paleoenvironmental interpretation of laminated sediments and silica burial |
topic_facet |
QE Geology |
description |
Preservation of laminations in hemipelagic and pelagic sediments is routinely attributed to reduced oxygen conditions that inhibited benthic activity. As such, the degree of preservation of laminae is used commonly as a paleo-oxygenation indicator. Recent evidence from deep-sea pelagic sediments in the eastern equatorial Pacific and North Atlantic, however, demonstrates that preservation of laminae may occur by rapid deposition of ungrazed Thalassiothrix longissima diatom mats that overwhelm the benthos in otherwise oxic bottom waters. Here, we report that similar diatom mat laminae are common in hemipelagic sediments of the Guaymas Basin in the Gulf of California, have aided preservation of the laminated sediment sequence and have also enhanced opal burial. Examples of diatom mats influencing sediment preservation are also described from the northern California Margin and from the Miocene Monterey Formation, southern California. Thus, even in classical settings of laminated sediment occurrence, caution needs to be taken in correlating degree of lamina preservation with paleo-oxygen levels. Such studies must be underpinned by detailed microfabric and micropaleontological analyses. |
format |
Article in Journal/Newspaper |
author |
Pike, Jennifer Kemp, Alan E. S. |
author_facet |
Pike, Jennifer Kemp, Alan E. S. |
author_sort |
Pike, Jennifer |
title |
Diatom mats in Gulf of California sediments: Implications for the paleoenvironmental interpretation of laminated sediments and silica burial |
title_short |
Diatom mats in Gulf of California sediments: Implications for the paleoenvironmental interpretation of laminated sediments and silica burial |
title_full |
Diatom mats in Gulf of California sediments: Implications for the paleoenvironmental interpretation of laminated sediments and silica burial |
title_fullStr |
Diatom mats in Gulf of California sediments: Implications for the paleoenvironmental interpretation of laminated sediments and silica burial |
title_full_unstemmed |
Diatom mats in Gulf of California sediments: Implications for the paleoenvironmental interpretation of laminated sediments and silica burial |
title_sort |
diatom mats in gulf of california sediments: implications for the paleoenvironmental interpretation of laminated sediments and silica burial |
publisher |
Geological Society of America |
publishDate |
1999 |
url |
https://orca.cardiff.ac.uk/id/eprint/9482/ https://doi.org/10.1130/0091-7613(1999)027<0311:DMIGOC>2.3.CO;2 https://doi.org/10.1130/0091-7613(1999)0270311:DMIGOC2.3.CO;2 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Pike, Jennifer https://orca.cardiff.ac.uk/view/cardiffauthors/A0179070.html orcid:0000-0001-9415-6003 orcid:0000-0001-9415-6003 and Kemp, Alan E. S. 1999. Diatom mats in Gulf of California sediments: Implications for the paleoenvironmental interpretation of laminated sediments and silica burial. Geology 27 (4) , pp. 311-314. 10.1130/0091-7613(1999)0270311:DMIGOC2.3.CO;2 https://doi.org/10.1130/0091-7613%281999%29027%3C0311%3ADMIGOC%3E2.3.CO%3B2 doi:10.1130/0091-7613(1999)0270311:DMIGOC2.3.CO;2 |
op_doi |
https://doi.org/10.1130/0091-7613(1999)027<0311:DMIGOC>2.3.CO;2 https://doi.org/10.1130/0091-7613(1999)0270311:DMIGOC2.3.CO;2 |
_version_ |
1766131401159081984 |