Keokuk County (Carboniferous of the United States)

Also known as Lower Verdi Member, St. Louis Fm., Keokuk Co., IO

Where: Keokuk County, Iowa (41.3° N, 92.2° W: paleocoordinates 8.5° S, 31.3° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Verdi Member (St. Louis Formation), Chesterian (335.5 - 323.2 Ma)

• This data is from the lower Verdi Member of the St. Loius Fm. The St. Louis Fm. in Iowa is younger than the type St. Louis.

• member-level stratigraphic resolution

Environment/lithology: offshore shelf; lithified, burrowed, peloidal wackestone and packstone

Size class: macrofossils

Collection methods: This list comes from a guidebook.

Primary reference: B. J. Witzke, R. M. McKay, B. J. Bunker and F. J. Woodson. 1990. Stratigraphy and paleoenvironments of Mississippian strata in Keokuk and Washington Counties, southeast Iowa. Iowa Department of Natural Resources, Guidebook Series 10:1-105 [A. Miller/A. Webber/M. Uhen]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 3294: authorized by Arnold Miller, entered by Andrew Webber on 29.07.1999, edited by Pete Wagner and Austin Hendy

Creative Commons license: CC BY (attribution)

Taxonomic list

• Some of the elements of this list were described by Van Tuyl (1925).
unclassified
  -
Rhodophyceae
  - Aoujgaliaceae
Fourstonella sp. Cummings 1955
Foraminifera
 Foraminifera -
Foraminifera indet. foram
"indet. encrusters" - originally entered as "Foraminifera indet. encrusters"
 Fusulinina - Archaesphaeridae
 Endothyroidea - Endothyridae
Endothyra ? obsoleta
originally entered as "Endothyra obsoleta?"
Endostaffella sp. Rozovskaya 1961
Priscella sp.
originally entered as "Priscella" sp."
 Fusulinina - Pseudoammodiscidae
 Fusulinina - Earlandiidae
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
"indet. debris" - originally entered as "Crinoidea indet. debris"
Scaphopoda
 Dentaliida - Laevidentaliidae
Laevidentalium sp. Cossmann 1888 tusk shell
Gastropoda
  -
Gastropoda indet. Cuvier 1795 snail
 Euomphalina - Euomphalidae
Straparollus sp. de Montfort 1810 snail
 Bellerophontida -
""Bellerophontoidea" indet." = Bellerophontoidea2
""Bellerophontoidea" indet." = Bellerophontoidea2 M'Coy 1851 snail
 Bellerophontida - Bellerophontidae
Bucanopsis sp. Ulrich and Scofield 1897 snail
Bivalvia
 Solemyida - Solemyidae
Clinopistha sp.1 Meek and Worthen 1870 Awning Clam
originally entered as "Clinopistha sp."
 Modiomorphida - Modiomorphidae
Modiomorpha sp. Hall and Whitfield 1869 clam
Spathella sp. Hall 1885 clam
 Cardiida -
Cypricardella sp. Hall 1856 clam
 Trigoniida - Schizodidae
Schizodus sp. King 1844 clam
 Pectinida - Aviculopectinidae
Aviculopecten sp. M'Coy 1851 scallop
Rhynchonellata
 Athyridida - Athyrididae
Cleiothyridina sp. Buckman 1906
 Terebratulida - Cranaenidae
Girtyella sp. Weller 1911
Strophomenata
 Productida - Productidae
 Productida - Echinoconchidae
 Productida - Monticuliferidae
 Orthotetida - Schuchertellidae
 Orthotetida - Orthotetidae
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
Stenolaemata
 Cryptostomata - Fenestellidae
Fenestella sp. Lonsdale 1839
Trilobita
 Proetida - Phillipsiidae
Kaskia sp. Weller 1936 trilobite
Deuteropoda
  -
Ostracoda indet. Latreille 1802 ostracod
Calcisphaera laevis
  -
Calcisphaera laevis Williamson 1880
Anthozoa
 Stauriida - Hapsiphyllidae
Neozaphrentis sp. Grove 1935 horn coral
 Auloporida - Syringoporidae
Syringopora sp. Goldfuss 1826 tabulate coral