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Map showing publication footprint
  • Usage in publication:
    • Hercules Tower sandstone
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Sandstone
  • AAPG geologic province:
    • Ozark uplift
Publication:

Cullison, J.S., 1944, The stratigraphy of some lower Ordovician formations of the Ozark uplift [Missouri and Arkansas]: University of Missouri School of Mines and Metallurgy Bulletin, Technical Series, v. 15, no. 2, 112 p.


Summary:

Pg. 29, 31, pl. 2. Hercules Tower sandstone in Lutie member of Theodosia formation. A massive red to reddish-brown medium-grained friable sandstone about 10 feet thick. Occurs near middle of Lutie and is separated from overlying Pocket Hollow oolite (new) by black and white chert and beds of finely crystalline dolomite and "cotton rock". Recognized in southern Missouri and northern Arkansas. Age is Early Ordovician.
Well exposed on MO Highway 125 south of Brush Creek about midway between village of Hercules and Hercules fire lookout tower, Taney Co., MO.

Source: US geologic names lexicon (USGS Bull. 1200, p. 1738).


Map showing publication footprint
  • Usage in publication:
    • Hercules Tower sandstone
  • Modifications:
    • Not used
  • AAPG geologic province:
    • Ozark uplift
Publication:

Ashley, R.P., and Silberman, M.L., 1976, Direct dating and mineralization at Goldfield, Nevada, by potassium-argon and fission-track methods: Economic Geology, v. 71, no. 5, p. 904-924.


Summary:

Pg. 131. Cullison (1944, p. 29) proposed "Hercules Tower sandstone" for a prominent sandstone within his Theodosia formation. The sandstone is well exposed on Missouri Highway 125 south of Brush Creek about midway between the village of Hercules and the Hercules fire lookout tower, Taney County, Missouri. This sandstone is usually referred to today as the "Swan Creek sandstone" of the Cotter Dolomite. Age is Ordovician (Ibexian).

Source: Publication.


Map showing publication footprint
  • Usage in publication:
    • Hercules Tower sandstone
  • Modifications:
    • Not used
  • AAPG geologic province:
    • Ozark uplift
Publication:

McFarland, J.D. (compiler), 2004, Stratigraphic summary of Arkansas: Arkansas Geological Commission Information Circular, no. 36 (Revised), 39 p. [Available online from the Arkansas Geological Survey.]


Summary:

Pg. 3-4. [In the Ozark Plateaus region of Arkansas, Cullinson's "Hercules Tower sandstone" in Lutie Member of Theodosia Formation is not differentiated from the Early Ordovician Jefferson City and Cotter formations. The "cotton rock" (=Cullinson's Theodosia) is included in the Cotter.]

Source: Interpreted from publication.


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For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).