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Sidney Center Outcrops - Tidal Rhythmites

Sidney Center Outcrops - Tidal rhythmites recorded as repetitive couplets of laminae of different well-sorted grain sizes of tidal origin within Tidally-Dominated Trough-Cross-Bedded Facies.

Sidney Center Outcrops
Located in Delaware County
Image courtesy of Dan Bishuk, Jon Hairabedian, James Ebert

Type: Quarry.

Features: Non-marine to marine transition of the Catskill Clastic Wedge;
Rare ripple cross-lamination; sparse fossils (Sphenotus, fish plates, plant frgmnt..).

Feature Type: Stratigraphic, Outcrop, Fossils, Scenic, Other.

Reference: NYS Geological Association Field Trip Guidebook, 63rd Annual Meeting 1991;
Storm-Dominated Shelf and Tidally-Influenced Foreshore Sedimentation, Upper Devonian Sonyea Group,
Bainbridge to Sidney Center, New York. For Online Reference Please visit: -

Quadrangle: Unadilla.

Reason for Designation: The suspected oxisol profile at the Steele Residence Quarry is not known to occur
outside this study area in NYS. The oxisol is believed to be unique within NYS because development of large,
long-lived interfluve areas where tidal processes dominated has not been documented elsewhere in the state.
Cattarugus Magnafacies rocks of this kind have not been described elsewhere in NYS.
Sedimentary structures are displayed in dramatic fashion.