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25 April 2024
 
  » pubmed » pmid17782382

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Opaline Sediments of the Southeastern Coastal Plain and Horizon A: Biogenic Origin
Fred M Weaver ; Sherwood W Wise ;
Date 24 May 1974
Journal Science, 184 (4139), 899-901
AbstractScanning electron microscope techniques show that Eocene opaline claystones (fuller’s earth and buhrstone) of the Atlantic and Gulf Coastal Plain, deposits long considered volcanic in origin, are actually highly altered diatomites formed as transgressive facies in normal marine continental shelf environmnents. These findings are in agreement with a biogenic origin for time-equivalent horizon A and A deep-sea cherts of the North Atlantic and Caribbean.
Source PubMed, pmid17782382 doi: 10.1126/science.184.4139.899
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