Name/Title
S07.04.017Description
Information for this slide comes from Philip M. Smith's presentation notes for Exploring Ohio's Caves: An illustrated discussion of Ohio's underground caverns prepared for the information program of the Ohio Division of Geological Survey. The notes are in Box 1154, Folder 3 of the Geology Subject Files compiled by Pauline Smyth. This is slide 6 in the notes: Enroute to caves, the explorers see fine examples of Ohio's natural scenery. This natural bridge near Greenfield, Ohio, is evidence of past erosional history.
Trimmer Arch is a natural arch of resistant Silurian Geologic Period Greenfield Dolomite in Ross County, Ohio. The Natural Arch and Bridge Society defines a natural arch as “a rock exposure that has a hole completely through it formed by the natural, selective removal of rock, leaving a relatively intact frame.”
Information taken from Ohio’s Natural Arches by Timothy A. Snyder (Ohio Geological Survey, Education Leaflet No. 18, Revised Edition, 2014) and Rainbows of Rock, Tables of Stone: The Natural Arches and Pillars of Ohio by Timothy A. Snyder (McDonald & Woodward: Granville, Ohio, 2009) and Natural Bridges in Ohio by Michael C. Hansen (Ohio Geological Survey, Ohio Geology Newsletter, Summer 1988).
This slide image included in the USGS National Digital Catalog for NGGDPP Grant G15AP00115 in FY2015.Context
Front-facing view of arch formation. Trimmer Arch in Ross County, Ohio.