Ausich 1986 Loc. 3. Byron Road Quarry: Llandovery, Ohio

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Phyrgilocrinus batheri
Clemetaocrinus ohioensis
Crinoidea - Cyathocrinida - Euspirocrinidae
Euspirocrinus heliktos
Crinoidea - Pisocrinida - Pisocrinidae
Pisocrinidae indet. Angelin 1878
diff. loc.
Crinoidea - Calceocrinida - Calceocrinidae
Calceocrinus ? incertus
?
Stibarocrinus ? centervillensis
?
Crinoidea - Diplobathrida - Opsiocrinidae
Silfonocrinus siluricus
Crinoidea - Diplobathrida - Anthemocrinidae
Turbocrinus paunctum
Crinoidea - Diplobathrida - Rhodocrinitidae
Stereoaster squamosus
Xysmacrinus greenensis
Crinoidea - Monobathrida - Glyptocrinidae
Zirocrinus litos
Crinoidea - Monobathrida - Stelidiocrinidae
Bikocrinus baios
Paiderocrinus ochthos
Crinoidea - Monobathrida - Periechocrinidae
Acacocrinus anebos
Tirocrinus trochos
Ibanocrinus petalos
see common names

Geography
Country:United States State/province:Ohio County:Greene
Coordinates: 39.8° North, 83.0° West (view map)
Paleocoordinates:25.5° South, 52.7° West
Basis of coordinate:based on political unit
Geographic resolution:local area
Time
Period:Silurian Epoch:Llandovery
10 m.y. bin:Silurian 1
*Period:Early/Lower Silurian *Epoch:Middle Llandovery - Late/Upper Llandovery
Key time interval:Llandovery
Age range of interval:443.80000 - 433.40000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Brassfield
Stratigraphic resolution:formation
Stratigraphy comments: The Brassfield Formation of Ohio was considered by Rexroad (1967) on the basis of rather sparse conodont evidence to be either late early, or middle Llandoverian. According to Nicoll & Rexroad (1968) the Brassfield, aside from the Lee Creek Member and Belfast Member (where present), is in their Icriodina irregularis condonont assemblage Zone in their study area, including the sites of Rexroad (1967). It should be noted that Foerste (1885) recorded Microcardinalia triplesiana from the Soldiers Home site (locality 6 of Ausich, 1986b); this occurrence has been confirmed (Rexroad et al., 1965; Boucot &Ehlers, 1963), and suggested a late Llandoverian (C4-C5) age to Rexroad et al. (1965). Microcardinalia triplesiana is now regarded as a good zonal indicator of approcimately C1-C2 age (Carlson & Boucot, 1970; Berry & Boucot, 1970). Triplesia has also been cited from the Brassgield in the Dayton, Ohio vicinity (Berry & Boucot, 1970), suggesting that the Brassfield in this area is a typical example of a Microcardinalia Zone fauna, i.e., C1-C2.
Lithology and environment
Primary lithology: lithified "reef rocks"
Lithology description: In the Dayton area, the Brassfield Formation is characterized by a complex set of shallow-water reef and reef-associated facies. Varied grainstone, packstone and mudstone lithologies are present. Preserved echinoderms are present in the leeward facies of small coral-stromotoporoid patch reefs (Sheehy, 1981).
Environment:reef, buildup or bioherm
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:paleoecologic analysis
Metadata
Also known as:Was: Stereoaster-Brockocystis Association of the Brassfield Formation of Ohio
Database number:13337
Authorizer:M. Foote Enterer:K. Koverman
Modifier:P. Wagner Research group:marine invertebrate
Created:2002-02-28 07:52:09 Last modified:2018-08-11 13:11:50
Access level:the public Released:2002-02-28 07:52:09
Creative Commons license:CC BY
Reference information

Primary reference:
4379. 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]