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More model informationThe sample is 4 inches tall
Basaltaltic - Andesite - K-Ar dates are about 70 ka (Baksi, A. K. (1974). “K-Ar study of the S.P. flow”. Canadian Journal of Earth Sciences: 1350–1356, v11.)
Here are some Gigapans of SP Crater - http://gigapan.com/gigapans/116799
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