I found it hiking near Lethbridge, Alberta years ago, just found it again while going through old boxes. The wavy lines look kind of organic, but I don't know about the rest.
this post was submitted on 16 Feb 2026
34 points (94.7% liked)
Cool Rocks
467 readers
31 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 1 month ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
The waves look very regular to me, maybe something like this? https://au.grandado.com/products/plastic-garden-edging-fence-border-green-corrugated-landscape-tidy-lawn-divider-prevent-overgrowth-of-grass-newest?variant=UHJvZHVjdFZhcmlhbnQ6ND
Not sure how multiple layers would break in a cross section. Maybe sediment plus freezing could make it brittle?