THE 
JOURNAL OF GEOLOGY 
OCTOBER-NOVEMBER, 1972 
THE DISCONFORMITY BETWEEN THE BEDFORD AND 
BEREA FORMATIONS IN CENTRAL OHIO" 
CHARLES S. PROSSER 
Columbus, Ohio 
CONTENTS 
INTRODUCTION 
Definition of Disconformity 
DESCRIPTION OF SECTIONS 
Spruce Run Sections 
Rocky Fork Section 
Smith Run Section 
Slate Run Section 
INTRODUCTION 
Most of the exposures of disconformity between the Bedford 
and Berea formations in central Ohio, described in this paper, have 
been known to the writer for the last eight years. A halftone of 
one of these outcrops showing the irregular base of the Berea sand- 
stone and the subjacent Bedford shale was published in December, 
1904, in the American Geologist.2, Lantern slides of this and other 
localities, showing similar structure made from photographs taken 
by the writer and his assistants, are in the collection of the Depart- 
ment of Geology of Ohio State University and have been available 
t Published by permission of the State Geologist of Ohio. 
- 2 American Geologist, XXXIV, Pl. XIX, Fig. 6, showing contact of Berea sand- 
stone and Bedford shale on bank of Smith Run. 
Vol. XX, No. 7 585 
