Promise, Old Armstrong (Dewey) County
Can I collect here?
ProBased on our latest records, with claims updated from the BLM on Oct 15, 2026. Land and claims can change quickly, so check before you go.
Minerals on record here
1 mineralRecorded here: fossil.
Nearby sites
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- Rochford177 mi · Arsenopyrite, galena, gold
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About Promise, Old Armstrong (Dewey) County
Geologic setting
- Geologic interval
- Maastrichtian
- Age
- 72.2–66 Ma
- Depositional environment
- marine indet.
- Recorded occurrences
- 1
SE1/4, Section 29, T16N, R29E, Dewey Co., S.D.
Fossils found here
Records and references
Data: Paleobiology Database collection 235355 (CC BY 4.0) — view the source record
Getting there
No directions yet.
How hard is it?
- Getting there
- – / 5
- Finding anything
- – / 5
- Votes
- 0
Trip reports
No trip reports yet.
Questions about Promise, Old Armstrong (Dewey) County
Can you collect at Promise, Old Armstrong (Dewey) County?
It depends on who owns the land and whether a mining claim covers it. BLM land usually allows hand collecting for personal use, national parks allow none, and private land needs the owner’s permission. Pro members see the owner and any claims at this spot.
What minerals are found at Promise, Old Armstrong (Dewey) County?
Fossil.
Comments
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Source: Paleobiology Database.