Algal limestones and associated sediments in the basal purbeck of dorset
By: Brown, Philip R
.
Material type: 
ArticleDescription: 565-573p ; Illustration.Subject(s): Algal limestone - Dorset - Great Britain | Thallophytes | Purbecks beds - Dorset - Great Britain | Historical geology - Great Britain
In:
Geological magazine : Vol. 100 Iss. 1-6 Year. 1963Summary: Abstract
The basal Purbeck of Dorset includes interesting “dirt-beds” or fossil soils. The limestones, previously considered freshwater, are here shown to be largely of marine algal origin containing species of Ortonella, Girvanella, and Solenopora and presumed algal stromatolites. Petrographic evidence of anhydrite, gypsum, and celestine suggests evaporitic conditions during their formation. This is supported by the presence of ostracods belonging to marine or super-saline species, and by the scarcity of other fauna.
| Item type | Current location | Collection | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|---|
Article
|
Library and Information Centre Periodical Section | Bound Journal Collection | Not for loan | 002548_77 | ||
Serials/Scientific Journal
|
Library and Information Centre Periodical Section | Bound Journal Collection | 550 GEO (Browse shelf) | Available | 002548 |
Abstract
The basal Purbeck of Dorset includes interesting “dirt-beds” or fossil soils. The limestones, previously considered freshwater, are here shown to be largely of marine algal origin containing species of Ortonella, Girvanella, and Solenopora and presumed algal stromatolites. Petrographic evidence of anhydrite, gypsum, and celestine suggests evaporitic conditions during their formation. This is supported by the presence of ostracods belonging to marine or super-saline species, and by the scarcity of other fauna.
There are no comments for this item.