Abandoned Ripley County Construction Company Quarry on SE edge of Osgood (Silurian to of the United States)

Also known as Was: Osgood Quarry; Holocystites (H.) alternatus-Triamara ventricosa Assoc., Locality 11 in Paul

Where: Ripley County, Indiana (39.1° N, 85.3° W: paleocoordinates 26.2° S, 53.6° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Osgood Formation, Telychian to Telychian (438.5 - 430.5 Ma)

• "?Late Llandoverian (C6) to early Wenlockian". Mainly middle part of formation.

• formation-level stratigraphic resolution

Environment/lithology: deep subtidal; shelly/skeletal, argillaceous bindstone and shelly/skeletal grainstone

• generally good preservation of echinoderms noted; holdfasts; biostromes and thickets; localized winnowed units; trilobites and bryozoans fragmented; "This is one of the few Midwest Silurian echinoderm associations which occur in both carbonate and argillaceous carbonate dominated facies. The community appears to have been subject to wave or current action periodically, but not continuously, i.e. was subject to effects from more than just very major storms...most likely BA 4 to outer BA 3."

•SEP environmental call based on given information and knowledge of regional geology

• "Rather similar [environment] to that of the Upper Osgood Shale Holocystitid-Coronoid Association, but with relatively less available hard substrate and greater susceptibility to current action. The lithology ranges between a bryozoan boundstone and skeletal grainstone, with skeletal packstone (marlstone) fabrics being especially common. Small masses (to 18 cm diam.) of micritic, relatively structureless algal limestone occur locally. The surrounding sediment is a calcareous, slightly silty shale with relatively rare skeletal debris (Middle Osgood Shale), an argillaceous limestone (skeletal wackestone: part of the Middle Osgood Limestone and lower Laurel Lst), or fine-grained dolomite, also with only rare skeletal grains (Romeo Mbr)."

Size classes: macrofossils, mesofossils

Reposited in the FMNH

• Abundances given for Osgood Quarry in table 45.42. I have added three trilobite genera mentioned in text but not included in table.

Primary reference: T. J. Frest, C. E. Brett, and B. J. Witzke. 1999. Caradocian-Gedinnian echinoderm associations of Central and Eastern North America. Paleocommunities--a case study from the Silurian and Lower Devonian 638-783 [M. Foote/K. Koverman/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 26803: authorized by Michael Foote, entered by Michael Foote on 01.11.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

 Corynexochida - Styginidae
Kosovopeltis sp. Snajdr 1958 trilobite
 Corynexochida - Illaenidae
Bumastus sp. Murchison 1839 trilobite
Illaenus sp. Dalman 1827 trilobite
 Phacopida - Dalmanitidae
Dalmanites sp. Barrande 1852 trilobite
 Phacopida - Encrinuridae
Staurocephalus sp. Barrande 1846 trilobite
 Phacopida - Calymenidae
Calymenidae indet. Milne-Edwards 1840 trilobite
 Lichida - Lichidae
Arctinurus sp. Castelnau 1843 trilobite
 Orthotetida - Chilidiopsidae
"Coolinia cf. subplana" = Fardenia (Coolinia)
"Coolinia cf. subplana" = Fardenia (Coolinia)
 Strophomenida - Leptestiidae
Leangella sp. Opik 1933
 Strophomenida - Leptostrophiidae
Mesoleptostrophia sp. Harper and Boucot 1978
 Strophomenida - Rafinesquinidae
 Dictyonellida - Eichwaldiidae
"Dictyonella sp." = Eodictyonella
"Dictyonella sp." = Eodictyonella Wright 1994
 Athyridida - Meristellidae
 Athyridida - Nucleospiridae
Nucleospira sp. Hall 1859
 Spiriferida - Cyrtiidae
Striispirifer sp. Cooper and Muir-Wood 1951
Eospirifer radiatus Sowerby 1834
Hedeina sp. Boucot 1957
 Spiriferida - Delthyrididae
Howellella ("") crispa Hisinger 1827
 Pentamerida - Parastrophinidae
Anastrophia sp. Hall 1867
 Atrypida - Atrypidae
Plectatrypa sp. Schuchert and Cooper 1930
 Atrypida - Atrypinidae
Atrypina sp. Hall and Clarke 1893
 Rhynchonellida - Trigonirhynchiidae
 Rhynchonellida - Machaerariidae
Ferganella sp. Nikiforova 1937
 Rhynchonellida - Rhynchotrematidae
 Orthida - Rhipidomellidae
Dalejina ("") hybrida Sowerby 1839
 Orthida - Dicoelosiidae
Dicoelosia sp. King 1850
 Orthida - Dalmanellidae
 Orthida - Hesperorthidae
Hesperorthis sp., "? Schizoramma sp." = Schizonema
Hesperorthis sp. Schuchert and Cooper 1931
"? Schizoramma sp." = Schizonema
 Orthida - Platystrophiidae
"Platystrophia cf. biforata" = Platystrophia biforatus
"Platystrophia cf. biforata" = Platystrophia biforatus Schlotheim 1820
 Sabellida - Serpulidae
Spirorbis sp. Daudin 1800
 Carditida - Cardiniidae
Cypricardinia sp. Hall 1860 clam
 Euomphalina - Platyceratidae
Naticonema "sp. 1" Perner 1903 snail
Naticonema "sp. 2" Perner 1903 snail
Naticonema "sp. 3" Perner 1903 snail
Cyclonema sp. Hall 1852 snail
 Murchisoniina - Loxonematidae
Loxonema sp. Phillips 1841 snail
 Cornulitida - Cornulitidae
Cornulites sp. Schlotheim 1820
 Orthocerida - Dawsonoceratidae
Dawsonoceras sp. Hyatt 1884
 Nautiloidea -
Nautiloidea indet. Agassiz 1847 nautiloid
Bryozoa indet. Ehrenberg 1831
 Glyptocystitoida - Callocystitidae
Callocystites sp. n. sp. Hall 1852
 Coronata -
Coronata indet. Jaekel 1918
 Coronata - Stephanocrinidae
 Rhombifera - Caryocrinitidae
Crinoidea indet. Miller 1821 Sea lily
 Disparida -
Myelodactylus sp. Hall 1852 Sea lily
 Pisocrinida - Pisocrinidae
 Calceocrinida - Calceocrinidae
Eohalysiocrinus sp. n. sp. Prokop 1970 Sea lily
 Sagenocrinida - Lecanocrinidae
 Cyathocrinida - Thalamocrinidae
Thalamocrinus sp. Miller and Gurley 1895 Sea lily
 Monobathrida - Eucalyptocrinitidae
Eucalyptocrinites sp. Goldfuss 1831 Sea lily
 Diplobathrida -
Lyriocrinus sp. Hall 1852 Sea lily
 Aristocystitoida - Aristocystitidae
"Holocystites ventricosus n. sp." = Triamara ventricosa
"Holocystites ventricosus n. sp." = Triamara ventricosa Miller 1879
 Sphaeronitida - Holocystitidae
 Octactinellida - Astraeospongiidae
Astraeospongium sp. Roemer 1860
 Tabulata -
Tabulata indet. tabulate coral
 Favositida - Favositidae
Favosites "sp. 1" Lamarck 1816 tabulate coral
Favosites "sp. 2" Lamarck 1816 tabulate coral
 Rugosa -
Rugosa indet. horn coral