Probable microbial origin of ordovician (Arenig) phosphatic pebble coats (‘ Bolopora ’) from North Wales, U.K.
By: Niedermeyer, R.-O
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Contributor(s): Langbein, R.
Material type: 
ArticleDescription: 691-698p ; Illustration.Subject(s): Microbial origin - Ordovician phosphatic pebble coats - North Wales | Bacteriogenic materials - Phosphatic pebble coats - North Wales | Sedimentary petrology - North Wales
In:
Geological magazine : Vol. 126 Iss. 1-6 Year. 1989Summary: Abstract
Results are presented of thin-section, SEM, X-ray and microprobe investigations on problematical phosphatic accretions (‘ Bolopora ’) from the St Tudwal's area of North Wales. The data supplement investigations made by H. J. Hofmann on the genesis of the accretions, and indicate a microbial (bacteriogenic) origin. The bacteriogenic pebble coats are of dahllite. Microbial relics suggest water–sediment interface-linked formation of the coatings under subtidal, and oxic to anoxic, environmental conditions during a sedimentary hiatus.
| Item type | Current location | Collection | Call number | Status | Date due | Barcode |
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Article
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Library and Information Centre Periodical Section | Bound Journal Collection | Not for loan | 002528_154 | ||
Serials/Scientific Journal
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Library and Information Centre Periodical Section | Bound Journal Collection | 550 GEO (Browse shelf) | Available | 002528 |
Abstract
Results are presented of thin-section, SEM, X-ray and microprobe investigations on problematical phosphatic accretions (‘ Bolopora ’) from the St Tudwal's area of North Wales. The data supplement investigations made by H. J. Hofmann on the genesis of the accretions, and indicate a microbial (bacteriogenic) origin. The bacteriogenic pebble coats are of dahllite. Microbial relics suggest water–sediment interface-linked formation of the coatings under subtidal, and oxic to anoxic, environmental conditions during a sedimentary hiatus.
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