Ages of tuff beds at East African early hominid sites and sediments in the Gulf of Aden
The early hominids of East Africa were dated by determining the ages of tuff beds at the sites. Despite much research using palaeomagnetic and K/Ar-dating techniques, some of those ages are still controversial 1,2 . To obtain independent age estimates for these tephra layers, we have examined cores...
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| Veröffentlicht in: | Nature (London) 1985-01, Vol.313 (6000), p.306-308 |
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| creator | Sarna-Wojcicki, A. M. Meyer, C. E. Roth, P. H. Brown, F. H. |
| description | The early hominids of East Africa were dated by determining the ages of tuff beds at the sites. Despite much research using palaeomagnetic and K/Ar-dating techniques, some of those ages are still controversial
1,2
. To obtain independent age estimates for these tephra layers, we have examined cores from DSDP Sites 231 and 232 in the Gulf of Aden (Fig. 1
a
) which consist mainly of calcareous nannofossil ooze, but also contain rare tephra horizons
3
dated by interpolation from the established nannofossil stratigraphy (Fig. 1
b
). Chemical analysis confirms that the identity and sequence of these horizons is the same as that at the East African sites. We conclude that the age of the Tulu Bor Tuff is |
| doi_str_mv | 10.1038/313306a0 |
| format | Article |
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1,2
. To obtain independent age estimates for these tephra layers, we have examined cores from DSDP Sites 231 and 232 in the Gulf of Aden (Fig. 1
a
) which consist mainly of calcareous nannofossil ooze, but also contain rare tephra horizons
3
dated by interpolation from the established nannofossil stratigraphy (Fig. 1
b
). Chemical analysis confirms that the identity and sequence of these horizons is the same as that at the East African sites. We conclude that the age of the Tulu Bor Tuff is <3.4 Myr and hence that the Hadar hominid specimens are also <∼3.4 Myr old.</description><identifier>ISSN: 0028-0836</identifier><identifier>EISSN: 1476-4687</identifier><identifier>DOI: 10.1038/313306a0</identifier><identifier>CODEN: NATUAS</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; Humanities and Social Sciences ; letter ; Marine ; multidisciplinary ; Science ; Science (multidisciplinary) ; Stratigraphy</subject><ispartof>Nature (London), 1985-01, Vol.313 (6000), p.306-308</ispartof><rights>Springer Nature Limited 1985</rights><rights>1985 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a342t-3258ed96ddf5763351d91dcff7063451a71cf43fdbf5ddac1f92e28bd7a630333</citedby><cites>FETCH-LOGICAL-a342t-3258ed96ddf5763351d91dcff7063451a71cf43fdbf5ddac1f92e28bd7a630333</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1038/313306a0$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1038/313306a0$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27903,27904,41467,42536,51297</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=9002282$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Sarna-Wojcicki, A. M.</creatorcontrib><creatorcontrib>Meyer, C. E.</creatorcontrib><creatorcontrib>Roth, P. H.</creatorcontrib><creatorcontrib>Brown, F. H.</creatorcontrib><title>Ages of tuff beds at East African early hominid sites and sediments in the Gulf of Aden</title><title>Nature (London)</title><addtitle>Nature</addtitle><description>The early hominids of East Africa were dated by determining the ages of tuff beds at the sites. Despite much research using palaeomagnetic and K/Ar-dating techniques, some of those ages are still controversial
1,2
. To obtain independent age estimates for these tephra layers, we have examined cores from DSDP Sites 231 and 232 in the Gulf of Aden (Fig. 1
a
) which consist mainly of calcareous nannofossil ooze, but also contain rare tephra horizons
3
dated by interpolation from the established nannofossil stratigraphy (Fig. 1
b
). Chemical analysis confirms that the identity and sequence of these horizons is the same as that at the East African sites. We conclude that the age of the Tulu Bor Tuff is <3.4 Myr and hence that the Hadar hominid specimens are also <∼3.4 Myr old.</description><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Humanities and Social Sciences</subject><subject>letter</subject><subject>Marine</subject><subject>multidisciplinary</subject><subject>Science</subject><subject>Science (multidisciplinary)</subject><subject>Stratigraphy</subject><issn>0028-0836</issn><issn>1476-4687</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1985</creationdate><recordtype>article</recordtype><recordid>eNplkE1Lw0AQhhdRsFbBn7AHET1E9yPZJMdQahUKXhSPYbof7ZZkU3c3h_57t7R68TQD87wPzIvQLSVPlPDqmVPOiQByhiY0L0WWi6o8RxNCWJWRiotLdBXClhBS0DKfoK9mrQMeDI6jMXilVcAQ8RxCxI3xVoLDGny3x5uht84qHGxMAXBp08r22sWArcNxo_Fi7MxB1SjtrtGFgS7om9Ocos-X-cfsNVu-L95mzTIDnrOYcVZUWtVCKVOUgvOCqpoqaUxJBM8LCiWVJudGrUyhFEhqaqZZtVIlCE4451N0f_Tu_PA96hDb3gapuw6cHsbQ0pySWrA6gQ9HUPohBK9Nu_O2B79vKWkPzbW_zSX07uSEIKEzHpy04Y-vU5esYgl7PGIhXdxa-3Y7jN6lb_8rfwCI-XkD</recordid><startdate>19850101</startdate><enddate>19850101</enddate><creator>Sarna-Wojcicki, A. M.</creator><creator>Meyer, C. E.</creator><creator>Roth, P. H.</creator><creator>Brown, F. H.</creator><general>Nature Publishing Group UK</general><general>Nature Publishing</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TN</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope></search><sort><creationdate>19850101</creationdate><title>Ages of tuff beds at East African early hominid sites and sediments in the Gulf of Aden</title><author>Sarna-Wojcicki, A. M. ; Meyer, C. E. ; Roth, P. H. ; Brown, F. H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a342t-3258ed96ddf5763351d91dcff7063451a71cf43fdbf5ddac1f92e28bd7a630333</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1985</creationdate><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>Humanities and Social Sciences</topic><topic>letter</topic><topic>Marine</topic><topic>multidisciplinary</topic><topic>Science</topic><topic>Science (multidisciplinary)</topic><topic>Stratigraphy</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sarna-Wojcicki, A. M.</creatorcontrib><creatorcontrib>Meyer, C. E.</creatorcontrib><creatorcontrib>Roth, P. H.</creatorcontrib><creatorcontrib>Brown, F. H.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Oceanic Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Nature (London)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sarna-Wojcicki, A. M.</au><au>Meyer, C. E.</au><au>Roth, P. H.</au><au>Brown, F. H.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Ages of tuff beds at East African early hominid sites and sediments in the Gulf of Aden</atitle><jtitle>Nature (London)</jtitle><stitle>Nature</stitle><date>1985-01-01</date><risdate>1985</risdate><volume>313</volume><issue>6000</issue><spage>306</spage><epage>308</epage><pages>306-308</pages><issn>0028-0836</issn><eissn>1476-4687</eissn><coden>NATUAS</coden><abstract>The early hominids of East Africa were dated by determining the ages of tuff beds at the sites. Despite much research using palaeomagnetic and K/Ar-dating techniques, some of those ages are still controversial
1,2
. To obtain independent age estimates for these tephra layers, we have examined cores from DSDP Sites 231 and 232 in the Gulf of Aden (Fig. 1
a
) which consist mainly of calcareous nannofossil ooze, but also contain rare tephra horizons
3
dated by interpolation from the established nannofossil stratigraphy (Fig. 1
b
). Chemical analysis confirms that the identity and sequence of these horizons is the same as that at the East African sites. We conclude that the age of the Tulu Bor Tuff is <3.4 Myr and hence that the Hadar hominid specimens are also <∼3.4 Myr old.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><doi>10.1038/313306a0</doi><tpages>3</tpages></addata></record> |
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| source | Nature; SpringerLink Journals - AutoHoldings |
| subjects | Earth sciences Earth, ocean, space Exact sciences and technology Humanities and Social Sciences letter Marine multidisciplinary Science Science (multidisciplinary) Stratigraphy |
| title | Ages of tuff beds at East African early hominid sites and sediments in the Gulf of Aden |
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