ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] In an area north-east of our site, at 14N and 117W, Johnson1 found that siliceous microfossil preservation was excellent in the surface sediments but deteriorated markedly 1-2 m below the sea floor, where biogenic opal was totally absent. Coincident with this disappearance of biogenic opal, there ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/302139a0
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