Mary’s Cave, also known as Shelter Rock, is a nice little rock shelter carved out of a volcanic rock formation in the Mojave National Preserve. There is a small tinaja (a depression in the bedrock made by water) next to the shelter in the canyon which would
Researchers also note that it is possible this is a solar observation site. The summer solstice and spring and autumn equinoxes line up well with notches on the distant eastern horizon at sunrise. Sunlight entering this cave would have marked the starting of spring and a renewal of the land.
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