erosion

  1. Grinding stone?

    Found this on the Santa Ynez trail, still getting familiar with natural erosion patterns. The depression gets wider on one end, which is where my doubt lies. Otherwise it’s pretty symmetrical. Any thoughts? Thanks!
  2. Good article on hunting rivers and streams.

    Material I haven't seen before. Enjoy. https://metaldetectingtips.com/metal-detecting-rivers-streams/
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