Skip to Main Content
Skip Nav Destination
GEOREF RECORD

Wavy and lenticular-bedded carbonate ribbon rocks of the Upper Cambrian Conococheague Limestone, central Appalachians

Robert V. Demicco
Wavy and lenticular-bedded carbonate ribbon rocks of the Upper Cambrian Conococheague Limestone, central Appalachians
Journal of Sedimentary Petrology (December 1983) 53 (4): 1121-1132

Abstract

Limestones are continuous wavy thin beds to isolated centimeter-scale pods; commonly have flat bottoms and ripple-form tops; typically are internally current- or wave-ripple cross-laminated; and are composed of peloidal grainstones. Dolostones interbedded with these limestones are typically continuous on the outcrop scale; drape underlying limestone ripple-forms; are commonly mudcracked; and are composed of 10-40 mu dolomite rhomobohedrons in a carbonate-clay matrix. Some ribbon rocks are disrupted by filled tubes, soft sediment deformation features, and abrupt lateral changes in rock type. Three observations suggest that the limestone-dolostone alternations of ribbon rocks reflect original carbonate sand-mud alternations. This interpretation is strongly amplified by comparing Conococheague ribbon rocks to examples of lenticular and wavy bedding from mixed siliciclastic sand and mud flats from the modern North Sea. An overall interpretation of Conococheague cycles as the regressive deposits of carbonate tidal flats.--Modified journal abstract.


ISSN: 0022-4472
Coden: JSEPAK
Serial Title: Journal of Sedimentary Petrology
Serial Volume: 53
Serial Issue: 4
Title: Wavy and lenticular-bedded carbonate ribbon rocks of the Upper Cambrian Conococheague Limestone, central Appalachians
Author(s): Demicco, Robert V.
Affiliation: Case West. Reserv. Univ., Dep. Geol. Sci., Cleveland, OH, United States
Pages: 1121-1132
Published: 198312
Text Language: English
Publisher: Society of Economic Paleontologists and Mineralogists, Tulsa, OK, United States
References: 38
Accession Number: 1984-045143
Categories: Sedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, strat. col., sketch map
N39°30'00" - N40°00'00", W78°00'00" - W77°34'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 1984
Close Modal

or Create an Account

Close Modal
Close Modal