Source:http://linkedlifedata.com/resource/pubmed/id/17811835
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
4957
|
| pubmed:dateCreated |
2010-6-8
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| pubmed:abstractText |
Trace element, isotopic, and mineralogic studies indicate that the proposed impact at the Cretaceous-Tertiary (K-T) boundary occurred in an ocean basin, although a minor component of continental material is required. The size and abundance of shocked minerals and the restricted geographic occurrence of the ejecta layer and impact-wave deposits suggest an impact between the Americas. Coarse boundary sediments at sites 151 and 153 in the Colombian Basin and 5- to 450-meter-thick boundary sediments in Cuba may be deposits of a giant wave produced by a nearby oceanic impact. On the southern peninsula of Haiti, a approximately 50-centimeter-thick ejecta layer occurs at the K-T boundary. This ejecta layer is approximately 25 times as thick as that at any known K-T site and suggests an impact site within approximately 1000 kilometers. Seismic reflection profiles suggest that a buried approximately 300-km-diameter candidate structure occurs in the Colombian Basin.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
|
| pubmed:month |
May
|
| pubmed:issn |
0036-8075
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:day |
18
|
| pubmed:volume |
248
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
843-7
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| pubmed:year |
1990
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| pubmed:articleTitle |
Proximal cretaceous-tertiary boundary impact deposits in the Caribbean.
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| pubmed:publicationType |
Journal Article
|