Petalocrinus mirabilis-Pentameroides-Coral Assoc., Buck Creek Member, E Iowa
Can I collect here?
ProBased 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 Petalocrinus mirabilis-Pentameroides-Coral Assoc., Buck Creek Member, E Iowa
Geologic setting
- Formation
- Scotch Grove
- Geologic interval
- Telychian to Sheinwoodian
- Age
- 438.6–430.6 Ma
- Depositional environment
- deep subtidal ramp
- Tectonic setting
- cratonic basin
- Recorded occurrences
- 25
"...crowns very rare..root systems common but generally not concentrated. The environment seems moderately active, basically an echinoderm shoal with other fauna intermixed and preserved only sporadically, probably most often in areas bordering the shoal proper, perhaps in slightly deeper and quieter water. The association with both coral-dominated and pentamerid-dominated communities indicates at least a BA 3-4 boundary position. The coral faunas are more diverse than typical BA2-3...'Costistricklandia', Dicoelosia, and Porpites in small numbers [suggest] outer BA3 to shallow BA4 for some sites...total range BA3 to shallow BA 4."\r\n\r\nSEP environmental call based on given description and same vol. page 807.
Eastern Iowa silurian outcrop belt, esp. Delaware, Jones, and Jackson Counties. Type loc. is Hanken Farm, Loc. HKQ of Witzke ('81b), NE1/4 sec. 6 T85N R2W, Scoth Grove 7.5' Quad, Jones Co.
Fossils found here
Records and references
Data: Paleobiology Database collection 26810 (CC BY 4.0) — view the source record
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Questions about Petalocrinus mirabilis-Pentameroides-Coral Assoc., Buck Creek Member, E Iowa
Can you collect at Petalocrinus mirabilis-Pentameroides-Coral Assoc., Buck Creek Member, E Iowa?
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 Petalocrinus mirabilis-Pentameroides-Coral Assoc., Buck Creek Member, E Iowa?
Fossil.
Comments
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Source: Paleobiology Database.