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National Geologic Map Database
Geologic Unit: Sycamore
Map showing publication footprint
  • Usage in publication:
    • Sycamore limestone*
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Limestone
  • AAPG geologic province:
    • South Oklahoma folded belt
Publication:

Taff, J.A., 1903, Tishomingo folio, Indian Territory: U.S. Geological Survey Geologic Atlas of the United States Folio, GF-98, 8 p., scale 1:125,000


Summary:

Sycamore limestone. Dense, even-textured bluish limestone, which weathers to yellowish hues and is hard and tough. Thickness 0 to 160 feet. Increases in thickness to west. Overlies Woodford chert and underlies Caney shale. [Age is Early Mississippian (Kinderhook).]
[Named from Sycamore Creek, which crosses its outcrop in T. 3 S., R. 4 E., Johnston Co., Arbuckle Mountains, central southern OK.]

Source: US geologic names lexicon (USGS Bull. 896, p. 2102).


Map showing publication footprint
  • Usage in publication:
    • Sycamore limestone*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • South Oklahoma folded belt

Map showing publication footprint
  • Usage in publication:
    • Sycamore sandstone
  • Modifications:
    • Overview
  • AAPG geologic province:
    • South Oklahoma folded belt
Publication:

Elias, M.K., and Branson, C.C., 1959, Type section of the Caney shale: Oklahoma Geological Survey Circular, no. 52.


Summary:

Pg. 22, 23. Sycamore sandstone exposed below Caney type section is unlike Sycamore of its type area and may be facies grading into Ahloso member of Caney.

Source: US geologic names lexicon (USGS Bull. 1200, p. 3796).


Map showing publication footprint
  • Usage in publication:
    • Sycamore formation
  • Modifications:
    • Revised
  • AAPG geologic province:
    • South Oklahoma folded belt
Publication:

Prestridge, J.D., 1959, Subdivisions of Sycamore formation, IN Mayes, J.W., and others, eds., Petroleum geology of southern Oklahoma; Volume 2: American Association of Petroleum Geologists Special Volume, no. 19, p. __., Prepared in conjunction with Ardmore Geol. Soc


Summary:

Pg. 156-164. Sycamore formation. In Ardmore basin, formation occupies stratigraphic interval between Caney (Meramecian) and Woodford (upper part Kinderhookian) formations. Divisible into two members, herein named Cornell Ranch (lower) and Worthey (upper). Consists of slate-blue tough silty to finely sandy limestone with calcareous shales ranging from very thin partings to lentils up to 30 feet thick. Lower part contains cherty limestones and calcareous shales, with a green shale at base. Near base is bed of limestone, typically glauconitic at base, becoming cherty in upper part. Total thickness up to 350 feet. Age is Mississippian.

Source: US geologic names lexicon (USGS Bull. 1200, p. 3796).


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 ([ ]).