Section in abandoned quarry ΒΌ mile southeast of Gale: Gamachian, Illinois

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Calvinia edgewoodensis
Lyellia thebesensis
Anthozoa - Stauriida - Zaphrentidae
Zaphrentis stokesi
synonym of Zaphrenthis
Rhynchonellata - Athyridida - Meristellidae
? Hindella ambigua Savage 1913
synonym of Cryptothyrella ovoides
Rhynchonellata - Atrypida - Atrypinidae
Atrypa praemarginalis Savage 1913
synonym of Atrypa putilla
Rhynchonellata - Atrypida - Atrypidae
Atrypa putilla (Hall and Clarke 1894)
Rhynchonellata - Orthida - Dalmanellidae
Dalmanella edgewoodensis Savage 1913
Rhynchonellata - Rhynchonellida - Trigonirhynchiidae
Rhynchotreta parva Savage 1913
synonym of Thebesia thebesensis
Rhynchonellata - Rhynchonellida - Rhynchotrematidae
? Camarotoechia concinna Savage 1913
recombined as Stegerhynchus concinna
? Rhynchonella janea Billings 1866
    = Stegerhynchus concinna Savage 1913
Amsden 1974
? Camarotoechia antiqua Savage 1913
recombined as Stegerhynchus antiqua
Gastropoda - Euomphalina - Platyceratidae
Cyclonema daytonensis Foerste 1899
Gastropoda - Murchisoniina - Lophospiridae
Lophospira fasciata n. sp. Savage 1913
recombined as Eunema fasciata
Trilobita - Lichida - Lichidae
Metapolichas breviceps
original and current combination Lichas (Metopolichas)
Metapolichas breviceps var. clintonensis
see common names

Geography
Country:United States State/province:Illinois County:Alexander
Coordinates: 37.2° North, 89.4° West (view map)
Paleocoordinates:24.7° South, 62.9° West
Time
Period:Ordovician Epoch:Late/Upper Ordovician
10 m.y. bin:Ordovician 5
Key time interval:Gamachian Graptolite zone: Normalograptus extraordinarius
Age range of interval:446.00000 - 443.80000 m.y. ago
Stratigraphy
Formation:Leemon
Local section:Gale Quarry Local bed:14-14.83 ft
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: Amorphognathus ordovicicus conodont zone
Conochitina scabra chitinozoan zone
Top of Normalograptus extraordinarius and Amorphognathus ordovicicus zones.
Marks end of HICE
Lithology and environment
Primary lithology:ooidal cherty/siliceous "limestone"
Lithology description: Single layer of gray, somewhat oolitic limestone, containing small pebbles of chert, one-fourth inch to 4 inches in diameter
Environment:carbonate indet.
Taphonomy
Modes of preservation:body,original silica
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Metadata
Database number:173287
Authorizer:P. Wagner Enterer:P. Wagner
Modifier:P. Wagner Research group:marine invertebrate
Created:2015-09-15 21:10:17 Last modified:2015-09-16 09:56:17
Access level:the public Released:2015-09-15 21:10:17
Creative Commons license:CC BY
Reference information

Primary reference:
22278. T. E. Savage. 1913. Stratigraphy and paleontology of the Alexandrian Series in Illinois and Missouri. Part I. Illinois Geological Survey, Bulletin 23:1-124 [G. Webster/G. Webster]

Secondary references:

187 T. W. Amsden. 1974. Late Ordovician and Early Silurian articulate brachiopods from Oklahoma, southwestern Illinois, and eastern Missouri. Bulletin - Oklahoma Geological Survey 119:1-154 [J. Alroy/M. Sommers/M. Uhen]
56343 S. M. Bergstrom, M. M. Saltzman, and B. Schmitz. 2006. First record of the Hirnantian (Upper Ordovician) δ13C excursion in the North American Midcontinent and its regional implications. Geological Magazine 143(5):657-678 [P. Wagner/P. Wagner]