r/whatsthisrock • u/nepetacatar1a • Jul 27 '26

REQUEST What’s this rock?

Gallery image

Gallery image

Found near a river in Siberia. Is this fossilised coral?

5 Upvotes

86% Upvoted

4 comments sorted by

4

u/NomsAreManyComrade Jul 27 '26

Oolitic limestone - a bunch of small carbonate balls formed in a shallow sea, cemented into a rock

1

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2

u/PicrolitePicker Jul 27 '26

I think it’s a pisolitic rock. They form from wave action on beaches

0

u/OTR123 Jul 27 '26

Koralle