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Journal of Sedimentary Petrology
Vol. 54 (1984)No. 4. (December), Pages 1206-1211
Dish Structures in Some Paleocene Deep-Sea Sandstones (Norwegian Sector, North Sea): Origin of the Dish-Forming Clays and their Effect on Reservoir Quality
Andrew Hurst, Antony T. Buller
The clay mineralogy of dish-structured sandstones supports the intrastratal, rather than the interstratal, redistribution of clays during the formation of dish structures. Authigenic Fe-chlorite is the predominant constituent clay mineral in the dish structures. Interbedded mudstones comprise illite/smectite with minor illite and chlorite. Dish-structured horizons cause a marked reduction in average vertical permeability.
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