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USGS · 70018627

Ichnology of transgressive-regressive surfaces in mixed carbonate-siliciclastic sequences, early Permian Chase Group, Oklahoma

J.R. Chaplin
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Abstract

Early Permian rocks of the Chase Group in north-central Oklahoma consist of repeated couplets of carbonates and clastics. The carbonates and clastics correlate to major transgressive and regressive events, respectively. The sole of the lowest (first) transgressive carbonate bed of each depositional couplet is covered with ubiquitous horizontal boxworks of the trace fossil Thalassinoides isp. Horizontal forms of the trace fossil Rhizocorallium isp. characterize the top bedding-plane surface of the highest (last) carbonate unit of each couplet, and mark the discontinuity surface at the culmination of a major transgression and the initial onset of a major regression. These trace-fossil associations are assigned to the substrate-controlled Glossifungites ichnofacies.

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BibTeXRIS

J.R. Chaplin. 1996. Ichnology of transgressive-regressive surfaces in mixed carbonate-siliciclastic sequences, early Permian Chase Group, Oklahoma. https://pubs.usgs.gov/publication/70018627

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USGS1996

Introduction: Paleozoic applications of sequence stratigraphy

Despite conceptual origins from studies of the Paleozoic strata of cratonic basins, sequence stratigraphy has largely been developed and applied to post-Paleozoic successions in extracratonic settings. The application of continental-margin sequence stratigraphic concepts to cratonic basinal successions is fraught with problems owing to slower rates of sediment accumulation, and consequently, a more coarsely defined temporal resolution. In addition, some important sequence stratigraphic components are rare or completely missing from cratonic areas. Common usage of genetic sequence stratigraphic terminology can coopt critical evaluation of depositional characters, and must be practiced with extreme caution in order to avoid 'model-driven' approaches to stratigraphic synthesis. The best available tests for evaluating current questions regarding the central role of eustasy in sequence stratigraphy may be through interregional and intercontinental comparisons of cratonic stratigraphic sequences.

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