Almost no conodonts have been described from the Vienna Limestone (Member) (Chesterian) in the Illinois Basin, although it is a key unit in recognized the base of the Branchville Formation in Indiana and the Buffalo Wallow Formation in Kentucky. The primary purpose of this paper then is to document the Vienna conodont fauna. Eleven sections in southern Indiana and three supplemental localities were chosen for study. Discrete-element taxonomy of Chesterian conodonts in the Illinois Basin had become relatively stable but is now mostly out of date, and so the collection is also being used to update the multielement taxonomy and to assist in evaluating quantitative statistical approaches to multielement taxonomy. The fauna is near normal in abundance of specimens, but diversity is low. Cavusgnathus dominates the fauna and with its ecologic associate Kladognathus makes up 95 percent of the fuana. Ambdagnathus is rare but fairly widely distributed. Hindeodus cristula and Synprioniodus was found only in bulk samples. The limited fauna is probably euryhaline and tolerated a wide range of energy levels, factors that excluded many of the usual Chesterian conodont animals.

Rexroad, C. B., 1981, Conodonts from the Vienna Limestone Member of the Branchville Formation (Chesterian) in southern Indiana: Indiana Geological Survey Occasional Paper 34, 16 p., 1 fig., 1 table, 2 pl.

You may also like:

Keywords: Vienna Limestone Member, Branchville Formation, Mississippian, paleontology, conodont

Can't find what you're looking for? Feel free to contact us directly:

Indiana Geological and Water Survey
1001 E. 10th St.
Bloomington, IN 47405
812-855-7636 (phone)
812-855-2862 (fax)

IGS Return Policy

  • Original sales receipt required.
  • Returns accepted within 30 days of purchase date.
  • Refund will be issued by the same method of payment as purchased.
  • Products must be returned in the same new condition as purchased.
  • Refunds on custom orders and digital products are NOT allowed.
  • Customers are responsible for paying shipping costs to return products.

Updated 8/19/2020