USNM728l, Cibolo Ranch, Sierra Alta Creek, Chinati Mountains
Presidio County, Texas29.86300, −104.32000
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 3, 2026. Land and claims can change quickly, so check before you go.
Minerals on record here
1 mineralRecorded here: fossil.
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About USNM728l, Cibolo Ranch, Sierra Alta Creek, Chinati Mountains
USNM728l, Cibolo Ranch, Sierra Alta Creek, Chinati Mountains is a fossil collection site in Presidio, Texas, cataloged in the Paleobiology Database. Fossils here come from the Cibolo Formation, dated to the Kungurian (283.3–274.4 million years ago). The depositional environment is recorded as reef, buildup or bioherm. Documented finds include Acosarina minuta, Acosarina, Acritosia teguliferoides, Antronaria dissona, Chonetinella ciboloensis, Cleiothyridina rectimarginata.
Geologic setting
- Formation
- Cibolo
- Geologic interval
- Kungurian
- Age
- 283.3–274.4 Ma
- Depositional environment
- reef, buildup or bioherm
- Recorded occurrences
- 34
Locality notes
bluff of Sierra Alta Creek, 0.8 mile N 83° E of Cibolo Ranch house, Chinati Peak quadrangle
Fossils found here
Acosarina minuta
Rhynchonellata · Schizophoriidae
Acosarina
Rhynchonellata · Schizophoriidae
Acritosia teguliferoides
Strophomenata · Cyclacanthariidae
Antronaria dissona
Rhynchonellata · Pontisiidae
Chonetinella ciboloensis
Strophomenata · Rugosochonetidae
Cleiothyridina rectimarginata
Rhynchonellata · Athyrididae
Composita
Rhynchonellata · Athyrididae
Crenispirifer angulatus
Rhynchonellata · Spiriferellinidae
Derbyia crenulata
Strophomenata · Derbyiidae
Derbyia nasuta
Strophomenata · Derbyiidae
Derbyia
Strophomenata · Derbyiidae
Dielasma
Rhynchonellata · Dielasmatidae
Diplanus rarus
Strophomenata · Derbyiidae
Diplanus
Strophomenata · Derbyiidae
Echinauris
Strophomenata · Productellidae
Elliottella varicostata
Strophomenata · Paucispiniferidae
Enteletes
Rhynchonellata · Enteletidae
Eolyttonia gigantea
Strophomenata · Lyttoniidae
Eolyttonia
Strophomenata · Lyttoniidae
Fimbrinia
Strophomenata · Productellidae
Hystriculina
Strophomenata · Paucispiniferidae
Hustedia
Rhynchonellata · Neoretziidae
Juresania
Strophomenata · Echinoconchidae
Kozlowskia alata
Strophomenata · Productellidae
Meekella attenuata
Strophomenata · Meekellidae
Meekella prionota
Strophomenata · Meekellidae
Pontisia robusta
Rhynchonellata · Pontisiidae
Scacchinella titan
Strophomenata · Scacchinellidae
Stenoscisma problematicum
Rhynchonellata · Stenoscismatidae
Planispina conida
Strophomenata · Cyclacanthariidae
Lophotichium simulatum
Anthozoa · Lophotichiidae
Assimulia (Assimulia) abscessa
Anthozoa · Lophotichiidae
Paraduplophyllum (Vacoea) tubaeformis tubaeformis
Anthozoa · Lophotichiidae
Paraduplophyllum (Vacoea) amplexoides amplexoides
Anthozoa · Lophotichiidae
Records and references
Data: Paleobiology Database collection 75861 (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 USNM728l, Cibolo Ranch, Sierra Alta Creek, Chinati Mountains
Can you collect at USNM728l, Cibolo Ranch, Sierra Alta Creek, Chinati Mountains?
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 USNM728l, Cibolo Ranch, Sierra Alta Creek, Chinati Mountains?
Fossil.
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Source: Paleobiology Database.