A tan greywacke sandstone from the Northern California Coast Range (Franciscan Assemblage bedrock). cm scale.
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I'm Ryan Mikulovsky. Tech geek. GIS pro. Avgeek. California Native plant gardener. All photos on this blog, unless stated otherwise, are mine. Cameras: Fujifilm X-T5 and X100V. Views are my own. Follow me on Mastodon: @rpmik@avgeek.social