Geological Notes

Geological Notes are brief technical reports on a mineral resource or other topics. (Note: no Geological Notes have been published since 1979.)

GN 1. Preliminary report on potential hydrocarbon reserves underlying the Ohio portion of Lake Erie, by Michael J. Clifford. 9 p., 8 figs., 1975. $2.00.

GN 2. Sand and gravel resources of Madison County, Ohio, by Michael L. Couchot. Map (1 inch equals about 1 mile), one sheet with text, 1975. $2.00.

GN 3. Potential natural gas resources in the Devonian shales in Ohio, by A. Janssens and Wallace de Witt, Jr. 12 p., 10 figs., 2 tables, 1 pl., 1976. Reprinted 1978. $4.00.

GN 4. Coal resources of a portion of the Pawpaw Creek watershed, Monroe, Noble, and Washington Counties, by Richard A. Struble, Horace R. Collins, and Richard M. DeLong. 16 p., 8 figs., 8 tables, 1976. $2.00.

GN 5. Limestone in the Tymochtee Dolomite(?) (Upper Silurian), Shawnee Township, Allen County, Ohio, by David A. Stith. 4 p., 1 fig., 2 tables, 1977. $1.50.

GN 6. Extent of till sheets and ice margins in northeastern Ohio, by George W. White. One sheet, 6 figs., 1 table, explanatory text, 1979. Out of print. See Bulletin 68.