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The AAPG/Datapages Combined Publications Database

Journal of Sedimentary Research (SEPM)

Abstract


Journal of Sedimentary Petrology
Vol. 41 (1971)No. 2. (June), Pages 593-598

Facies and Bed Thickness Distributions of Limestones: NOTES

David N. Lumsden

ABSTRACT

Bed thicknesses in terrigenous clastics have long been observed to follow a lognormal distribution but data on carbonate rocks are rare. Studies of facies intervals, determined by detailed thin-section analysis, and bed thicknesses, described in field notes, for the Bird Spring Group and Callville Formation (Pennsylvanian and Permian) of southern Nevada have revealed that limestones also follow a lognormal trend. This is true for the separately investigated limestone facies (F1: micrite; F2: sparsely fossiliferous micrite; F3: packed biomicrite or pelmicrite; F4: biopelsparite) and for the data resulting when all these facies are combined.

The universality of a lognormal distribution for populations of facies and bed thicknesses in limestones precludes the use of Markov chain analysis in which lithologic identifications are made at equal intervals along a vertical section.


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