Filters: Tags: Mines and mineral resources (X)

Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Extensions NGGDPP Item (282) Categories Physical Item (282) View Results as: JSON ATOM CSV

The Olen Corporation in Franklin County, Ohio, 1990s The Olen Corporation sand and gravel pit south of Columbus, Franklin County, Ohio. Douglas L. Crowell is shown in the image that was made after a teachers workshop field trip probably in 1993. Categories: Physical Item; Tags: Gravel, Mines and mineral resources, Quaternary Geologic Period, Sand, Slides The Waterloo Coal Company in Jackson County, Ohio The Waterloo Coal Company strip mining operation in Jackson County, Ohio. Waterloo Coal Company mined both coal and limestone at their operation. Bedrock is from the Pennsylvanian Geologic Period. The image was taken during a teachers workshop field trip in a summer between 1988 to 1995. Categories: Physical Item; Tags: Coal, Mines and mineral resources, Pennsylvanian Geologic Period, Slides « 1 ... 11 12 13 14 15