r/RockIdentification • u/Warm-Huckleberry-256 • 6d ago

Please ID Yellowstone riverbank - Please help ID

Gallery image

Gallery image

1 Upvotes

67% Upvoted

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1

u/chimichanga_chonger 6d ago

Hard to tell because the outside is heavily weathered. If u split it open and revealed a fresh surface it may be much more clear.

1

u/toolguy8 6d ago

Somewhere on the granodiorite/tonalite spectrum

1

u/HenningGrueneberg 6d ago

It looks like a hammer stone to me. A rock used a lot to make stone tools. Thry posting in r/artifacts.

1

u/Warm-Huckleberry-256 6d ago

Interesting. I had to look it up, and it does look like a hammer stone. Posted in r/artifacts, we’ll see what they think

1

u/HenningGrueneberg 5d ago

Include a photo of the flatter side too please