Cal Orko, Bolivia, limestone wall of dinosaur trace fossil footprints. Source: https://twistedsifter.com/2013/10/cal-orko-wall-in-bolivia-covered-in-dinosaur-tracks
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A Blog About Stone Gathering, Tumbling and Polishing, and Rocks and Landscapes, from New Zealand – With Musical Interludes (john.tumblestone@gmail.com)