Rocks that are believed to have been used as scratching rocks by mammoths, on the Sonoma Coast of California, USA.

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Size: 5760px × 3840px
Location: Sonoma Coast, California, USA
Photo credit: © Gina Kelly / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: america, archeological, bison, boulders, california, coast, coastal, county, era, foot, footpath, geology, hiking, kortum, mammoth, outdoor, park, path, pleistoscene, prairie, pre-historic, rocks, schist, scratching, site, sonoma, state, states, trail, travel, united, usa, walking