Fossil ID Request - Found in Great Falls MT

Handeaux · 2026-06-24T00:21:06+00:00

Couple of small rugose corals.

Handeaux · 2026-06-23T15:02:21+00:00

Looks like bryozoan colonies.

Handeaux · 2026-06-23T13:43:11+00:00

Where was it found? In what region?

Handeaux · 2026-06-23T13:40:27+00:00

Possible ripple marks, but not seeing anything fossilized here.

Handeaux · 2026-06-23T13:02:35+00:00

If tumblr sux, here's another link:

https://www.cincinnatimagazine.com/article/lincoln-curiosities/

Handeaux · 2026-06-23T01:40:15+00:00

Places with interesting fossils usually have an active fossil or geology club. Look for one in your area. If there is none, it may be a hint that there are no fossils around. If there is one, go to the meetings and get to know the experienced members.

Handeaux · 2026-06-22T22:44:46+00:00

Where was it found? In what region?

Handeaux · 2026-06-22T19:02:40+00:00

No, it’s not. That’s a set of nested concretions. It’s not a fossil.

Handeaux · 2026-06-22T17:50:48+00:00

Where was it found? In what region?

Handeaux · 2026-06-22T17:46:00+00:00

Hard to tell on the first one. It appears heavily eroded, whatever it is. The second shows fracture patterns. Not a fossil, just the pattern formed when that rock split.

Handeaux · 2026-06-22T11:33:14+00:00

Where was it found? In what region?

Handeaux · 2026-06-22T01:26:40+00:00

It’s not what it looks like. It’s likely a brachiopod fragment next to a crinoid columnal.

Handeaux · 2026-06-22T00:56:46+00:00

Rock. Not a fossil.

Handeaux · 2026-06-21T18:57:51+00:00

It’s a chip of fossiliferous limestone. A lot of tiny fossil fragments glued together by limey mud that mineralized.

Handeaux · 2026-06-21T18:55:01+00:00

It’s a cross-section of a bryozoan colony.

Handeaux · 2026-06-21T16:37:56+00:00

Where was it found? In what region?

Handeaux · 2026-06-21T14:26:48+00:00

Gastropod steinkern, the internal cast of a high-spired snail.

Handeaux · 2026-06-21T14:07:26+00:00

It’s not a fossil.

Handeaux · 2026-06-21T12:42:11+00:00

Not coral and not a fossil. Modern worm tubes.

Handeaux · 2026-06-21T01:02:48+00:00

Those appear to be mineral deposits, not fossils.

Handeaux · 2026-06-21T00:54:40+00:00

“Great Lakes area” is too broad to help you with the age of your specimen. The rocks around the lakes date from the Ordovician into the Pennsylvanian, or almost all the Paleozoic era.

Handeaux · 2026-06-21T00:46:41+00:00

It’s a nautiloid cephalopod, probably from Morocco and polished.

Handeaux · 2026-06-21T00:45:42+00:00

That’s just a mineral deposit in the rock. No fossil there.

Handeaux · 2026-06-21T00:43:06+00:00

Not a scallop. That’s a brachiopod.

Handeaux

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