Found this cool rock at lake Tahoe. It has 2 white rings around it that are so perfect I thought at first they were drawn. Now it lives in my Chia pet garden. Here's an additional pic.
this post was submitted on 30 Dec 2025
66 points (100.0% liked)
Cool Rocks
676 readers
25 users here now
A place for:
- Sharing cool rocks you found
- Discussing cool rocks
- Memeing about rocks
- Sharing rock facts
- Cool rocks
Minerals are cool, too.
Be gneiss to each other.
Please use posts for your rocks. Feel free to add more pictures and links to articles in the post text.
founded 7 months ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
Could be from one of the streams leading into the lake. Could be many, many years of the small but present waves of the lake hitting the shore. Or could have been created when the Sierra Nevada were closer to sea level.
Nice. Tahoe gets huge waves from time to time. Most of my cool rocks come from that area.
Waves were my top theory.