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| | INDIANA LIMESTONE COLLECTION CA. 1910-1984 |
 | | Limestone is the most widely used building stone in history, used by the ancient Egyptians, Incas, and Mayas. Limestone is a sedimentary rock composed of calcium carbonate. There are many varieties, which vary in color, texture, and other physical characteristics, but all were created in prehistoric oceans. |
 | | The harder, more crystalline limestone is found in the eastern and southeastern parts of Indiana, especially in Decatur County. Flagstone is found largely in the northern regions of the state. |
 | | Business letter from Indiana Limestone Company to St. Lawrence Marble Quarries in Gouverneur, New York, dated 1 October 1929 regarding steam and electric channeling machines and that the two photos described below were enclosed. |
| www.indianahistory.org /Library/manuscripts/collection_guides/P0456.html (1386 words) |
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