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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Carbonate Facies in the Lower Carboniferous (Visean) of St. Monance, East Fife, Scotland
A. A. Selim, P. McL. D. Duff
ABSTRACT
The Lower Carboniferous Limestone Group of St. Monance, East Fife, consists of repeated sedimentary cycles of coal-limestone-shale-and sandstone. Thin section studies of the limestone bands indicate that they are formed of three main lithologies: (1) calcistone, (2) magnesium calcistone, and (3) calcitic dolostone arranged in order of increasing MgO content. The calcistone is represented by two microfacies: coral biolithite, and foraminiferal biosparite. The magnesium calcistone is only represented by crinoidal biosparite. The textures of the carbonates reflect deposition in marine environment of different energy levels.
Dolomitization has preferentially replaced the crinoid-rich bands which appear to reflect two originally contrasted rock types: mud-supported and grain-supported. No good correlation exists between the amount of HCl insoluble residue and strontium or magnesium. However, relatively significant negative correlation between magnesium and strontium is clearly observed.
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