Bloom Basin Local Fauna
Pennington County, South Dakota43.90833, −102.17944
Can I collect here?
ProSee who owns this land and whether it is claimedPro shows the owner, the claim on this spot and every claim within a mile.
Based on our latest records, with claims updated from the BLM on Oct 9, 2026. Land and claims can change quickly, so check before you go.
Minerals on record here
1 mineralRecorded here: fossil.
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The Market
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About Bloom Basin Local Fauna
Bloom Basin Local Fauna is a fossil collection site in Pennington, South Dakota, cataloged in the Paleobiology Database. The depositional environment is recorded as terrestrial indet. Documented finds include Testudinidae, Apalone, Lacertilia, Calamagras angulatus, Aves, Megaleptictis altidens.
Geologic setting
- Geologic interval
- Orellan
- Age
- 33.9–31.8 Ma
- Depositional environment
- terrestrial indet.
- Recorded occurrences
- 27
Fossils found here
Testudinidae
Reptilia · Testudinidae
Apalone
Reptilia · Trionychidae
Lacertilia
Reptilia
Calamagras angulatus
Reptilia · Boidae
Aves
Aves
Megaleptictis altidens
Mammalia · Leptictidae
Hyaenodon
Mammalia · Hyaenodontidae
Hesperocyon gregarius
Mammalia · Canidae
Daphoenus
Mammalia · Amphicyonidae
Dinictis
Mammalia · Nimravidae
Palaeogale sectoria
Mammalia · Palaeogalidae
Megalagus
Mammalia · Leporidae
Palaeolagus haydeni
Mammalia · Leporidae
Leporidae
Mammalia · Leporidae
Ischyromys
Mammalia · Ischyromyidae
Brachygaulus
Mammalia · Aplodontiidae
Eutypomys thomsoni
Mammalia · Eutypomyidae
Adjidaumo lophatus
Mammalia · Eomyidae
Heliscomyidae
Mammalia · Heliscomyidae
Subhyracodon
Mammalia · Rhinocerotidae
Mesohippus
Mammalia · Equidae
Archaeotherium
Mammalia · Entelodontidae
Merycoidodon culbertsonii
Mammalia · Merycoidodontidae
Hypertragulus calcaratus
Mammalia · Hypertragulidae
Hypertragulidae
Mammalia · Hypertragulidae
Leptomeryx evansi
Mammalia · Leptomerycidae
Leptomeryx
Mammalia · Leptomerycidae
Records and references
Data: Paleobiology Database collection 163487 (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 Bloom Basin Local Fauna
Can you collect at Bloom Basin Local Fauna?
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 Bloom Basin Local Fauna?
Fossil.
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Source: Paleobiology Database.