Section in abandoned quarry ΒΌ mile southeast of Gale (Ordovician of the United States)

Where: Alexander County, Illinois (37.2° N, 89.4° W: paleocoordinates 24.7° S, 62.9° W)

When: Normalograptus extraordinarius graptolite zone, Leemon Formation, Gamachian (449.5 - 443.7 Ma)

• Amorphognathus ordovicicus conodont zone

•Conochitina scabra chitinozoan zone

•Top of Normalograptus extraordinarius and Amorphognathus ordovicicus zones.

•Marks end of HICE

• bed-level stratigraphic resolution

Environment/lithology: ooidal, cherty/siliceous limestone

• Single layer of gray, somewhat oolitic limestone, containing small pebbles of chert, one-fourth inch to 4 inches in diameter

Size class: macrofossils

Preservation: original silica

Primary reference: 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]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 173287: authorized by Pete Wagner, entered by Pete Wagner on 15.09.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Calvinia edgewoodensis, Lyellia thebesensis
Trilobita
 Lichida - Lichidae
"Metapolichas breviceps" = Metopolichas
"Metapolichas breviceps" = Metopolichas trilobite
Metapolichas breviceps var. clintonensis
Gastropoda
 Euomphalina - Platyceratidae
Cyclonema daytonensis
Cyclonema daytonensis Foerste 1899 snail
 Murchisoniina - Lophospiridae
"Lophospira fasciata n. sp." = Eunema fasciata
"Lophospira fasciata n. sp." = Eunema fasciata Savage 1913 snail
Rhynchonellata
 Athyridida - Meristellidae
"? Hindella ambigua" = Cryptothyrella ovoides
"? Hindella ambigua" = Cryptothyrella ovoides Savage 1913
 Orthida - Dalmanellidae
Dalmanella edgewoodensis
 Atrypida - Atrypidae
Atrypa putilla
Atrypa putilla Hall and Clarke 1894
 Atrypida - Atrypinidae
"Atrypa praemarginalis" = Eospirigerina putilla
"Atrypa praemarginalis" = Eospirigerina putilla Hall and Clarke 1894
 Rhynchonellida - Rhynchotrematidae
"? Camarotoechia concinna" = Stegerhynchus concinna, "Stegerhynchus concinna" = Stegerhynchus concinna, "? Camarotoechia antiqua" = Stegerhynchus antiqua
"? Camarotoechia concinna" = Stegerhynchus concinna Savage 1913
"Stegerhynchus concinna" = Stegerhynchus concinna Savage 1913
"? Camarotoechia antiqua" = Stegerhynchus antiqua Savage 1913
 Rhynchonellida - Trigonirhynchiidae
"Rhynchotreta parva" = Thebesia thebesensis
"Rhynchotreta parva" = Thebesia thebesensis Foerste 1909
Anthozoa
 Stauriida - Zaphrentidae
"Zaphrentis stokesi" = Zaphrenthis
"Zaphrentis stokesi" = Zaphrenthis horn coral