Sidney Mountain Quarry - Straight-Crested, Asymmetrical Ripples
Sidney Mountain Bluestone Quarry
Located in Delaware County
Image courtesy of Dan Bishuk, Jon Hairabedian, James Ebert
Features: Rare & unique exposure of albic argillisols & gleyed protosols;
Non-marine transition sequences of the Cattaraugus Magnafacies.
Straight-crested, asymmetrical ripples with rounded to flat, planed-off crests
indicative of tidal reworking within Planar-Bedded Multistory Sandbody Facies.
Feature Type: Sedimentology.
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: - www.nysga.net/Guidebooks.html
Reason for Designation: The advanced degree of pedogenesis observed in the albic argillisols of
Sidney Mountain Quarry and the oxisols reported at Skytop Lane Quarry in the study area have not been
reported elsewhere in NYS. The newly recognized paleosols in the Sonyea Group have proven to be critical
clues to understanding the dynamics of the Catskill shoreline. Sedimentary features of statewide significance are
recorded within the suite of tidally influenced facies at this location.