The U.S. Navy has begun the challenging task of cataloging more than a million petroglyphs within its secret weapons testing center at China Lake, near Ridgecrest, Calif.
Some of the thousands of petroglyphs lining the walls of Little Petroglyph Canyon, which is in a restricted area of China Lake Naval Air Weapons Station. (Rick Loomis / Los Angeles Times)
Archeologists say the petroglyphs were carved by the Coso Shoshone peoples about 15,000 years ago. (Rick Loomis / Los Angeles Times)
Michael Baskerville, 51, examines a petroglyph at Little Petroglyph Canyon. (Rick Loomis / Los Angeles Times)
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The petroglyphs portray animals, people and radiating circles. (Rick Loomis / Los Angeles Times)
Petroglyphs line lining he walls of Little Petroglyph Canyon. The area was established as a Navy base in 1943. (Rick Loomis / Los Angeles Times)
Petroglyphs in Little Petroglyph Canyon. (Rick Loomis / Los Angeles Times)
Michael Baskerville explores Little Petroglyph Canyon. (Rick Loomis / Los Angeles Times)