Late Miocene to early Pliocene marine diatom and silicoflagellate floras from the Oregon coast and continental shelf

A diatomite outcrop at Bandon Beach, Oregon and some diatom-rich mudstone outcrops from the Oregon continental shelf were examined for diatom and silicoflagellate remains. Samples from these sites are compared, the floras are documented, and the outcrops are related to a modern diatom stratigraphy....

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Veröffentlicht in:Micropaleontology 1985-01, Vol.31 (3), p.249-270
Hauptverfasser: Whiting, Mark C, Schrader, Hans
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creator Whiting, Mark C
Schrader, Hans
description A diatomite outcrop at Bandon Beach, Oregon and some diatom-rich mudstone outcrops from the Oregon continental shelf were examined for diatom and silicoflagellate remains. Samples from these sites are compared, the floras are documented, and the outcrops are related to a modern diatom stratigraphy. Seven silicoflagellate and 91 diatom taxa are recorded from these assemblages, of which two diatom taxa are described as new (Rhizosolenia twistata and Thalassiosira multipora). The abundance of planktonic marine microfossils indicates that these diatomites and mudstones were deposited in a highly productive deep-water marine environment. Sample ages are Early Pliocene for Bandon Beach and Cape Arago, and Late Miocene for Heceta Bank samples, indicating a possible progression from west to east with oldest material seaward (Heceta Bank) and youngest material landward (Bandon Beach and Cape Arago).
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Schrader, Hans</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a408t-1af360e38e42c8d6d05ccd9f5bfa1a865c9a669376f01160f75bd09c662638773</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1985</creationdate><topic>algae</topic><topic>assemblages</topic><topic>Bandon Beach</topic><topic>Cape Arago</topic><topic>Cell walls</topic><topic>Cenozoic</topic><topic>clastic rocks</topic><topic>continental shelf</topic><topic>deep-sea environment</topic><topic>Diatoms</topic><topic>Drilling</topic><topic>Flora</topic><topic>Heceta Bank</topic><topic>Invertebrata</topic><topic>lower Pliocene</topic><topic>Marine</topic><topic>marine environment</topic><topic>microfossils</topic><topic>Miocene</topic><topic>mudstone</topic><topic>Neogene</topic><topic>new taxa</topic><topic>oceanography</topic><topic>Oregon</topic><topic>Outcrops</topic><topic>planktonic taxa</topic><topic>Plantae</topic><topic>Pliocene</topic><topic>Protista</topic><topic>Rhizosolenia twistata</topic><topic>Seas</topic><topic>sedimentary rocks</topic><topic>Silicoflagellata</topic><topic>Spores</topic><topic>Stratigraphy</topic><topic>Surgical instruments</topic><topic>Taxa</topic><topic>taxonomy</topic><topic>Tertiary</topic><topic>Thalassiosira multipora</topic><topic>United States</topic><topic>upper Miocene</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Whiting, Mark C</creatorcontrib><creatorcontrib>Schrader, Hans</creatorcontrib><collection>CrossRef</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) 1: Biological Sciences &amp; Living Resources</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) Professional</collection><jtitle>Micropaleontology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Whiting, Mark C</au><au>Schrader, Hans</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Late Miocene to early Pliocene marine diatom and silicoflagellate floras from the Oregon coast and continental shelf</atitle><jtitle>Micropaleontology</jtitle><date>1985-01-01</date><risdate>1985</risdate><volume>31</volume><issue>3</issue><spage>249</spage><epage>270</epage><pages>249-270</pages><issn>0026-2803</issn><eissn>1937-2795</eissn><abstract>A diatomite outcrop at Bandon Beach, Oregon and some diatom-rich mudstone outcrops from the Oregon continental shelf were examined for diatom and silicoflagellate remains. Samples from these sites are compared, the floras are documented, and the outcrops are related to a modern diatom stratigraphy. Seven silicoflagellate and 91 diatom taxa are recorded from these assemblages, of which two diatom taxa are described as new (Rhizosolenia twistata and Thalassiosira multipora). The abundance of planktonic marine microfossils indicates that these diatomites and mudstones were deposited in a highly productive deep-water marine environment. Sample ages are Early Pliocene for Bandon Beach and Cape Arago, and Late Miocene for Heceta Bank samples, indicating a possible progression from west to east with oldest material seaward (Heceta Bank) and youngest material landward (Bandon Beach and Cape Arago).</abstract><pub>American Museum of Natural History</pub><doi>10.2307/1485544</doi><tpages>22</tpages></addata></record>
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identifier ISSN: 0026-2803
ispartof Micropaleontology, 1985-01, Vol.31 (3), p.249-270
issn 0026-2803
1937-2795
language eng
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source JSTOR Archive Collection A-Z Listing
subjects algae
assemblages
Bandon Beach
Cape Arago
Cell walls
Cenozoic
clastic rocks
continental shelf
deep-sea environment
Diatoms
Drilling
Flora
Heceta Bank
Invertebrata
lower Pliocene
Marine
marine environment
microfossils
Miocene
mudstone
Neogene
new taxa
oceanography
Oregon
Outcrops
planktonic taxa
Plantae
Pliocene
Protista
Rhizosolenia twistata
Seas
sedimentary rocks
Silicoflagellata
Spores
Stratigraphy
Surgical instruments
Taxa
taxonomy
Tertiary
Thalassiosira multipora
United States
upper Miocene
title Late Miocene to early Pliocene marine diatom and silicoflagellate floras from the Oregon coast and continental shelf
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