UGA Stratigraphy Lab

The data is in the strata

• UGA
• Geology Dept.
• Stratigraphy Lab
• Steven Holland

• Fossils and Strata
  of the Type Cincinnatian
• Fossils
• Stratigraphy
• References
• Links to Other Cincinnatian Sites
• Acknowledgments
•  
• Graptolithina

Orthograptus

Orthograptus calcaratus
from Ruedemann, 1947

Species

Orthograptus amplexicaulis (Hall)
Occurrence: Utica
Reference: Mitchell and Bergström, 1991; Bergström and Mitchell, 1990

Orthograptus sp. aff. O. amplexicaulis (Hall)
Occurrence: Kope
Reference: Mitchell and Bergström, 1991

Orthograptus amplexicaulis richmondensis (Ruedemann)
Occurrence: Drakes / Bull Fork
Reference: Berry, 1966; Bergström and Mitchell, 1986
Formerly Orthograptus truncatus richmondensis

Orthograptus cf. O. calcaratus basilicus Lapworth
Occurrence: Utica
Reference: Mitchell and Bergström, 1991

Orthograptus quadrimucronatus (Hall, 1865)
Occurrence: Utica, Clays Ferry / Kope, Arnheim
Reference: Bergström and Mitchell, 1986; Mitchell and Bergström, 1991; Bergström and Mitchell, 1990; Bergström, 1996
Includes Diplograptus (Amplexograptus) recurrens richmondensis Ruedemann and Orthograptus truncatus richmondensis

Orthograptus ruedemanni (Gurley)
Occurrence: Utica
Reference: Mitchell and Bergström, 1991; Bergström and Mitchell, 1990

Orthograptus sp. cf. O. ruedemanni (Gurley)
Occurrence: Utica
Reference: Mitchell and Bergström, 1991

Orthograptus socialis?
Occurrence: Drakes / Bull Fork
Reference: Bergström and Mitchell, 1986

Comments or questions? Please contact Steven Holland at stratum@uga.edu

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