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u/Entire-Mountain5288

Image 1 — I found these rocks in my backyard in San Francisco. Are they fossilized bones? Or just pumice or similar igneous rock. Thank you
Image 2 — I found these rocks in my backyard in San Francisco. Are they fossilized bones? Or just pumice or similar igneous rock. Thank you
Image 3 — I found these rocks in my backyard in San Francisco. Are they fossilized bones? Or just pumice or similar igneous rock. Thank you
Image 4 — I found these rocks in my backyard in San Francisco. Are they fossilized bones? Or just pumice or similar igneous rock. Thank you
Image 5 — I found these rocks in my backyard in San Francisco. Are they fossilized bones? Or just pumice or similar igneous rock. Thank you
Image 6 — I found these rocks in my backyard in San Francisco. Are they fossilized bones? Or just pumice or similar igneous rock. Thank you
Image 7 — I found these rocks in my backyard in San Francisco. Are they fossilized bones? Or just pumice or similar igneous rock. Thank you
Image 8 — I found these rocks in my backyard in San Francisco. Are they fossilized bones? Or just pumice or similar igneous rock. Thank you
Image 9 — I found these rocks in my backyard in San Francisco. Are they fossilized bones? Or just pumice or similar igneous rock. Thank you
Image 10 — I found these rocks in my backyard in San Francisco. Are they fossilized bones? Or just pumice or similar igneous rock. Thank you
Image 11 — I found these rocks in my backyard in San Francisco. Are they fossilized bones? Or just pumice or similar igneous rock. Thank you
Image 12 — I found these rocks in my backyard in San Francisco. Are they fossilized bones? Or just pumice or similar igneous rock. Thank you
Image 13 — I found these rocks in my backyard in San Francisco. Are they fossilized bones? Or just pumice or similar igneous rock. Thank you
Image 14 — I found these rocks in my backyard in San Francisco. Are they fossilized bones? Or just pumice or similar igneous rock. Thank you
▲ 16 r/fossilid+1 crossposts

I found these rocks in my backyard in San Francisco. Are they fossilized bones? Or just pumice or similar igneous rock. Thank you

I found these while digging under and old English ivy root, and was wondering if it was fossilized bone. I think it’s see marrow lines but idk if it’s just concrete or pumice or something. Thank you!

u/Entire-Mountain5288 — 5 days ago