Marble - Colorado Geological Survey
Marble - Colorado Geological Survey
Marble - Colorado Geological Survey
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DIRS 120<br />
INDIANA DEPARTMENT OF NATURAL RESOURCES PATRICK R. RALSTON. DIRECTOR<br />
<strong>Geological</strong> <strong>Survey</strong> Division<br />
611 North Walnut Grove<br />
Bloomington, Indiana 47405<br />
812-855-2687<br />
Mr. John W. Rold<br />
<strong>Colorado</strong> <strong>Geological</strong> <strong>Survey</strong><br />
1313 Sherman Street, Room 715<br />
Denver, CO 80203<br />
Dear John:<br />
October 5, 1989 ° CTl °KSS<br />
We did further compressive strength tests on material that we could<br />
identify as coming from the interior of the large marble specimen.<br />
Presumably these samples would not be weathered. The results follows<br />
Sample no.<br />
2a<br />
2b<br />
2c<br />
Size (inches)<br />
2x2<br />
2x2<br />
2x2<br />
Compressive strength (lb/in ) Mean<br />
8,100<br />
8,500<br />
8,200 8,270<br />
We were able to determine that samples 1c and la from previous testing<br />
of compressive strength came from near the exterior of the specimen, which<br />
suggests that the low values may be the result of weathering. I feel that the<br />
results above are more typical of unweathered material and should be used for<br />
your evaluation.<br />
Sincerely,<br />
DDC:md<br />
cc: Randall K. Streufert<br />
"EQUAL OPPORTUNITY EMPLOYER"<br />
W—<br />
Donald D. Carr, Branch Head<br />
Mineral Resources & Data Management
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