Maryland Petroglyphs (rock carvings) PETROGLYPHS are prehistoric depictions carved in rock. The designs were pecked or carved into relatively soft rock, and possibly “finished” by polishing the cut grooves with sand

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Date: 2015-06-15 14:36:01		Maryland Petroglyphs (rock carvings) PETROGLYPHS are prehistoric depictions carved in rock. The designs were pecked or carved into relatively soft rock, and possibly “finished” by polishing the cut grooves with sand Add to Reading List Source URL: mht.maryland.gov Download Document from Source Website File Size: 712,61 KB Share Document on Facebook