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The AAPG/Datapages Combined Publications Database
AAPG Special Volumes
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Petrographic descriptions, sedimentary structures, and facies analysis document the predominantly tidal control on deposition of the Pickaway Limestone. Cross-bedded ooid-peloid grainstones accumulated over the West Virginia dome as decimeter-sized intertidal sand waves and meter-sized subtidal sand waves. Evidence of tidal sedimentation includes bidirectional foresets, tidal bedding, mud drapes, reverse grading, wavy bedding, reactivation surfaces, and tidal bundles. Sand holes, desiccation cracks, mud chips, and interbeds of red shale and finely crystalline dolomite formed during periods of subaerial exposure, whereas ripple bedding hints of occasional wave activity. Storms passing over the sand waves produced thin sets of trough cross-beds and plane beds. Major storms lso led to the migration of the subtidal sand waves over other facies. In the quiet offshore environment, pelletal-skeletal packstones and wackestones were deposited, although advancing spillover lobes or tempestites produced interbedded sets of ooid grainstone.
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