A Search for Iridium Abundance Anomalies at Two Late Cambrian Biomere Boundaries in Western Utah
Iridium concentrations have been measured in samples taken across two Late Cambrian biomere boundaries (crisis zones) in search of evidence for possible elemental abundance anomalies similar to the one observed at the Cretaceous-Tertiary boundary. Sampling was performed in uplifted marine limestone...
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| Veröffentlicht in: | Science (American Association for the Advancement of Science) 1984-01, Vol.223 (4632), p.163-165 |
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| container_end_page | 165 |
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| container_issue | 4632 |
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| container_title | Science (American Association for the Advancement of Science) |
| container_volume | 223 |
| creator | Orth, Charles J. Knight, Jere D. Quintana, Leonard R. Gilmore, James S. Palmer, Allison R. |
| description | Iridium concentrations have been measured in samples taken across two Late Cambrian biomere boundaries (crisis zones) in search of evidence for possible elemental abundance anomalies similar to the one observed at the Cretaceous-Tertiary boundary. Sampling was performed in uplifted marine limestone deposits in the House Range of western Utah. Although the two trilobite-brachiopod extinction boundaries could be assigned to $\pm $4 millimeters of vertical section by laboratory examination of the rocks, only background amounts of iridium (2 $\times $ 10$^{-12}$ to 17 $\times $ 10$^{-12}$ gram per gram of whole rock) were observed. |
| doi_str_mv | 10.1126/science.223.4632.163 |
| format | Article |
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Sampling was performed in uplifted marine limestone deposits in the House Range of western Utah. Although the two trilobite-brachiopod extinction boundaries could be assigned to $\pm $4 millimeters of vertical section by laboratory examination of the rocks, only background amounts of iridium (2 $\times $ 10$^{-12}$ to 17 $\times $ 10$^{-12}$ gram per gram of whole rock) were observed.</description><identifier>ISSN: 0036-8075</identifier><identifier>EISSN: 1095-9203</identifier><identifier>DOI: 10.1126/science.223.4632.163</identifier><identifier>PMID: 17733805</identifier><language>eng</language><publisher>United States: The American Association for the Advancement of Science</publisher><subject>290400 - Energy Planning & Policy- Energy Resources ; ABUNDANCE ; CAMBRIAN PERIOD ; CARBONATE ROCKS ; CHEMICAL ANALYSIS ; Comets ; ELEMENTS ; ENERGY PLANNING, POLICY AND ECONOMY ; EXPLORATION ; FEDERAL REGION VIII ; Geochemistry ; GEOLOGIC AGES ; IRIDIUM ; LIMESTONE ; METALS ; NORTH AMERICA ; ORE COMPOSITION ; PALEOZOIC ERA ; PLATINUM METALS ; ROCKS ; SEDIMENTARY ROCKS ; TRANSITION ELEMENTS ; USA ; UTAH</subject><ispartof>Science (American Association for the Advancement of Science), 1984-01, Vol.223 (4632), p.163-165</ispartof><rights>Copyright 1984 The American Association for the Advancement of Science</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a351t-d5eff0aa0e4c3effebf87a4855a4ca5f7ca7b07e75535fbf33d5fe364320069c3</citedby><cites>FETCH-LOGICAL-a351t-d5eff0aa0e4c3effebf87a4855a4ca5f7ca7b07e75535fbf33d5fe364320069c3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/1692673$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/1692673$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,780,784,803,885,2884,2885,27924,27925,58017,58250</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/17733805$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/6473850$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Orth, Charles J.</creatorcontrib><creatorcontrib>Knight, Jere D.</creatorcontrib><creatorcontrib>Quintana, Leonard R.</creatorcontrib><creatorcontrib>Gilmore, James S.</creatorcontrib><creatorcontrib>Palmer, Allison R.</creatorcontrib><creatorcontrib>Los Alamos National Lab., New Mexico</creatorcontrib><title>A Search for Iridium Abundance Anomalies at Two Late Cambrian Biomere Boundaries in Western Utah</title><title>Science (American Association for the Advancement of Science)</title><addtitle>Science</addtitle><description>Iridium concentrations have been measured in samples taken across two Late Cambrian biomere boundaries (crisis zones) in search of evidence for possible elemental abundance anomalies similar to the one observed at the Cretaceous-Tertiary boundary. Sampling was performed in uplifted marine limestone deposits in the House Range of western Utah. Although the two trilobite-brachiopod extinction boundaries could be assigned to $\pm $4 millimeters of vertical section by laboratory examination of the rocks, only background amounts of iridium (2 $\times $ 10$^{-12}$ to 17 $\times $ 10$^{-12}$ gram per gram of whole rock) were observed.</description><subject>290400 - Energy Planning & Policy- Energy Resources</subject><subject>ABUNDANCE</subject><subject>CAMBRIAN PERIOD</subject><subject>CARBONATE ROCKS</subject><subject>CHEMICAL ANALYSIS</subject><subject>Comets</subject><subject>ELEMENTS</subject><subject>ENERGY PLANNING, POLICY AND ECONOMY</subject><subject>EXPLORATION</subject><subject>FEDERAL REGION VIII</subject><subject>Geochemistry</subject><subject>GEOLOGIC AGES</subject><subject>IRIDIUM</subject><subject>LIMESTONE</subject><subject>METALS</subject><subject>NORTH AMERICA</subject><subject>ORE COMPOSITION</subject><subject>PALEOZOIC ERA</subject><subject>PLATINUM METALS</subject><subject>ROCKS</subject><subject>SEDIMENTARY ROCKS</subject><subject>TRANSITION ELEMENTS</subject><subject>USA</subject><subject>UTAH</subject><issn>0036-8075</issn><issn>1095-9203</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1984</creationdate><recordtype>article</recordtype><recordid>eNp9kUFrFDEUx4Modlv9BkWCBz3NmuQlmZnjdtFaWPBgi8eYybywKTuTmmSQfnuz7EJvnvLg_f5_wvsRcs3ZmnOhv2QXcHa4FgLWUoNYcw2vyIqzXjW9YPCarBgD3XSsVRfkMudHxuquh7fkgrctQMfUivze0J9ok9tTHxO9S2EMy0Q3wzKPtrbTzRwnewiYqS30_m-kO1uQbu00pGBnehPihAnpTTwG0pELM_2FuWCa6UOx-3fkjbeHjO_P7xV5-Pb1fvu92f24vdtudo0FxUszKvSeWctQOqgjDr5rreyUstJZ5Vtn24G12CoFyg8eYFQeQUsQjOnewRX5eOqNuQRTj1PQ7V2cZ3TFaNlCp1iFPp-gpxT_LPWXZgrZ4eFgZ4xLNvUqvOsVh0p--i8ppBQge1lBeQJdijkn9OYphcmmZ8OZOYoyZ1GmijJHUaaKqrEP5_5lmHB8CZ3NVOD6BDzmEtPLXvdCV-QfLRyZjg</recordid><startdate>19840113</startdate><enddate>19840113</enddate><creator>Orth, Charles J.</creator><creator>Knight, Jere D.</creator><creator>Quintana, Leonard R.</creator><creator>Gilmore, James S.</creator><creator>Palmer, Allison R.</creator><general>The American Association for the Advancement of Science</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>7X8</scope><scope>OTOTI</scope></search><sort><creationdate>19840113</creationdate><title>A Search for Iridium Abundance Anomalies at Two Late Cambrian Biomere Boundaries in Western Utah</title><author>Orth, Charles J. ; Knight, Jere D. ; Quintana, Leonard R. ; Gilmore, James S. ; Palmer, Allison R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a351t-d5eff0aa0e4c3effebf87a4855a4ca5f7ca7b07e75535fbf33d5fe364320069c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1984</creationdate><topic>290400 - Energy Planning & Policy- Energy Resources</topic><topic>ABUNDANCE</topic><topic>CAMBRIAN PERIOD</topic><topic>CARBONATE ROCKS</topic><topic>CHEMICAL ANALYSIS</topic><topic>Comets</topic><topic>ELEMENTS</topic><topic>ENERGY PLANNING, POLICY AND ECONOMY</topic><topic>EXPLORATION</topic><topic>FEDERAL REGION VIII</topic><topic>Geochemistry</topic><topic>GEOLOGIC AGES</topic><topic>IRIDIUM</topic><topic>LIMESTONE</topic><topic>METALS</topic><topic>NORTH AMERICA</topic><topic>ORE COMPOSITION</topic><topic>PALEOZOIC ERA</topic><topic>PLATINUM METALS</topic><topic>ROCKS</topic><topic>SEDIMENTARY ROCKS</topic><topic>TRANSITION ELEMENTS</topic><topic>USA</topic><topic>UTAH</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Orth, Charles J.</creatorcontrib><creatorcontrib>Knight, Jere D.</creatorcontrib><creatorcontrib>Quintana, Leonard R.</creatorcontrib><creatorcontrib>Gilmore, James S.</creatorcontrib><creatorcontrib>Palmer, Allison R.</creatorcontrib><creatorcontrib>Los Alamos National Lab., New Mexico</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><collection>OSTI.GOV</collection><jtitle>Science (American Association for the Advancement of Science)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Orth, Charles J.</au><au>Knight, Jere D.</au><au>Quintana, Leonard R.</au><au>Gilmore, James S.</au><au>Palmer, Allison R.</au><aucorp>Los Alamos National Lab., New Mexico</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A Search for Iridium Abundance Anomalies at Two Late Cambrian Biomere Boundaries in Western Utah</atitle><jtitle>Science (American Association for the Advancement of Science)</jtitle><addtitle>Science</addtitle><date>1984-01-13</date><risdate>1984</risdate><volume>223</volume><issue>4632</issue><spage>163</spage><epage>165</epage><pages>163-165</pages><issn>0036-8075</issn><eissn>1095-9203</eissn><abstract>Iridium concentrations have been measured in samples taken across two Late Cambrian biomere boundaries (crisis zones) in search of evidence for possible elemental abundance anomalies similar to the one observed at the Cretaceous-Tertiary boundary. Sampling was performed in uplifted marine limestone deposits in the House Range of western Utah. Although the two trilobite-brachiopod extinction boundaries could be assigned to $\pm $4 millimeters of vertical section by laboratory examination of the rocks, only background amounts of iridium (2 $\times $ 10$^{-12}$ to 17 $\times $ 10$^{-12}$ gram per gram of whole rock) were observed.</abstract><cop>United States</cop><pub>The American Association for the Advancement of Science</pub><pmid>17733805</pmid><doi>10.1126/science.223.4632.163</doi><tpages>3</tpages></addata></record> |
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| source | JSTOR Archive Collection A-Z Listing; American Association for the Advancement of Science |
| subjects | 290400 - Energy Planning & Policy- Energy Resources ABUNDANCE CAMBRIAN PERIOD CARBONATE ROCKS CHEMICAL ANALYSIS Comets ELEMENTS ENERGY PLANNING, POLICY AND ECONOMY EXPLORATION FEDERAL REGION VIII Geochemistry GEOLOGIC AGES IRIDIUM LIMESTONE METALS NORTH AMERICA ORE COMPOSITION PALEOZOIC ERA PLATINUM METALS ROCKS SEDIMENTARY ROCKS TRANSITION ELEMENTS USA UTAH |
| title | A Search for Iridium Abundance Anomalies at Two Late Cambrian Biomere Boundaries in Western Utah |
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