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The AAPG/Datapages Combined Publications Database

Journal of Sedimentary Research (SEPM)


Journal of Sedimentary Petrology
Vol. 38 (1968)No. 3. (September), Pages 948-949

Origin of Large Kaolinite Crystals in the Lower Almond Formation in Southwest Wyoming: NOTES

G. B. Asquith


Large elongate (up to 3 mm) subhedral to euhedral crystals of kaolinite were discovered in the Upper Cretaceous Almond formation near Rock Springs, Wyoming. The kaolinite is present as a 1-3 inch thick underclay in the lower, nonmarine portion of tile Almond formation. The large grain size, its well developed crystal form, and the lack of abrasion of the delicate kaolin books indicate that the kaolinite crystallized in place and is not detrital in origin.

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