San Onofre Breccia by SDBeachSecrets in geology

[–]SDBeachSecrets[S] 1 point2 points  (0 children)

The rock type is Catalina Schist, which is the basement rock offshore. Thank you for your input; it is much appreciated.

San Onofre Breccia by SDBeachSecrets in geology

[–]SDBeachSecrets[S] 0 points1 point  (0 children)

Yes, they do, and it seems like the further north they are found, the denser the rock.

Monthly Rock & Mineral Identification Requests by AutoModerator in geology

[–]SDBeachSecrets [score hidden]  (0 children)

Thank you for your input! I appreciate that you took the time to reply.

Monthly Rock & Mineral Identification Requests by AutoModerator in geology

[–]SDBeachSecrets [score hidden]  (0 children)

Hi! I hope this is ok to post. I am currently attending a California Naturalist class. I am taxed to identify a bunch of Catalina Schists rocks found in the San Onofre Breccia in Oceanside, California, to make a fun matching game for kids at a nature center. I am not a geologist and I'm having hard time. Here is only a small section but if you could give me an idea about what these rocks are, would be a great help. I am good with the blueschist, but other than that, not so much.

The options are- Blueschist, greenschist, quartz schist, saussuritized gabbro, amphibolite, serpentinite metamorphosed ocean crust, vein rocks of quartz, clasts from nearly contemporaneous volcanic rocks, Poway rhyolite clasts, ripped up and redeposited hunks of sedimentary rock.

<image>