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Start Over Collector Lawrence E. Dawson Materials Basalt (basic igneous rock)
Hearst Museum object titled Hammerstone, accession number 2-58513, described as mano, gray basalt, irregular shape, slightly modified by pecking around the periphery; wear pattern on one face only. 7.8 cm. length
Hearst Museum object titled Hammerstone fragment, accession number 2-30846, described as Hammerstone fragment, green basalt; length 3 1//4 inches.

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