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Dimerocrinites (D.) hopkintonensis Assoc., Welton Mbr., Scotch Grove Fm., E Iowa

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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 mineral

Recorded here: fossil.

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About Dimerocrinites (D.) hopkintonensis Assoc., Welton Mbr., Scotch Grove Fm., E Iowa

Dimerocrinites (D.) hopkintonensis Assoc., Welton Mbr., Scotch Grove Fm., E Iowa is a fossil collection site in Iowa, cataloged in the Paleobiology Database. Fossils here come from the Scotch Grove Formation, dated to the Telychian to Sheinwoodian (438.6–430.6 million years ago). The depositional environment is recorded as deep subtidal ramp and the tectonic setting is cratonic basin. Documented finds include Dimerocrinites, Siphonocrinus, Pregazacrinus, Allocrinus, Marsupiocrinus, Eucalyptocrinites.

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
15
Geology notes

"Pelmatozoan root systems are noted, and both coarse skeletal debris and whole fossils are common. Echinoderms generally found as intact calices...many of the brachiopods articulated...little sign of winnowing, size sorting, or cross-bedding...This comm. likely occupies a relatively broad range, from outer BA 3 to inner BA 4...not an echinoderm thicket..."\r\n\r\nSEP environmental call based on given description and same vol. page 807.

Locality notes

Type loc. Orelup locality, a small abandoned quarry, Loc. 2 of Witzke and Strimple 1981, Cedar Co. Iowa.

Fossils found here

Dimerocrinites
Crinoidea · Dimerocrinitidae
Siphonocrinus
Crinoidea · Lampterocrinidae
Pregazacrinus
Crinoidea · Gazacrinidae
Allocrinus
Crinoidea · Dolatocrinidae
Marsupiocrinus
Crinoidea · Marsupiocrinidae
Eucalyptocrinites
Crinoidea · Eucalyptocrinitidae
Callocystitidae
NO_CLASS_SPECIFIED · Callocystitidae
Trilobita
Trilobita
Tabulata
Anthozoa
Rugosa
Anthozoa
Gastropoda
Gastropoda
Nautiloidea
Cephalopoda
Bivalvia
Bivalvia

Records and references

Data: Paleobiology Database collection 26715 (CC BY 4.0) — view the source record

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Questions about Dimerocrinites (D.) hopkintonensis Assoc., Welton Mbr., Scotch Grove Fm., E Iowa

Can you collect at Dimerocrinites (D.) hopkintonensis Assoc., Welton Mbr., Scotch Grove Fm., 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 Dimerocrinites (D.) hopkintonensis Assoc., Welton Mbr., Scotch Grove Fm., E Iowa?

Fossil.

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Meteorite nearbyA 28.4 kg stony meteorite fell at Marion (Iowa) in 1847, 26 miles from here.

Source: Paleobiology Database.