Linked Life Data

11538476

Source:http://linkedlifedata.com/resource/pubmed/id/11538476

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1996-5-17
pubmed:abstractText
Impact structures can be catalogued according to the age of the rocks in which they are now found ("country rocks"). The observed frequency distribution of craters by age of country rock is shown to be statistically indistinguishable from the predictions of a simple model in which it is assumed that the survival time for craters is the same as that for their target rocks. Other models are considered, but do not match the data. A lower limit of the rate of bombardment through the Phanerozoic, based only on documented craters, is 0.13 +/- 0.09 events/ma/10(8) km2 for craters with diameters > or = 10 km and 0.09 +/- 0.08 events/ma/10(8) km2 for craters with diameters > or = 20 km. The data allow, but do not demand, an increase in meteorite flux over the Phanerozoic but do not allow any significant decrease. We estimate that only about 6% of the existing terrestrial impact structures of diameter greater than 10 km have been discovered to date, and only 16% of those with diameter greater than 20 km.
pubmed:keyword
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
S
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0022-1376
pubmed:author
pubmed:issnType
Print
pubmed:volume
98
pubmed:owner
NASA
pubmed:authorsComplete
Y
pubmed:pagination
385-98
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
Crater taphonomy and bombardment rates in the Phanerozoic.
pubmed:affiliation
George Mason University, Fairfax, Va. 22030, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't