Arcadia Park Shale

The Arcadia Park Shale is a geologic formation within the Eagle Ford Group that outcrops in the northern portion of East Texas. It was deposited during the Middle to Late Turonian of the Late Cretaceous.[2] It was originally described by W. L. Moreman from outcrops near the former Arcadia Park railway station west of downtown Dallas, where it is 100 ft (30 m) thick.[1] In the type area there is an unconformity between the Arcadia Park and the underlying Britton Formation.[2] The base of the Arcadia Park is a thin limestone termed the Kamp Ranch Limestone.[3] The Kamp Ranch Limestone is made up of broken pieces (prisms) of Inoceramus clams, and also contains shark's teeth.[4] The remainder of the Arcadia Park in the Dallas area is shale with concretions. Sandstones are found within the Arcadia Park north of Dallas. The sandstones have been termed the Bells Sandstone Member for outcrops in Grayson County, and the Sub-Clarksville Sandstone in the subsurface. The shale overlying the Bells Sandstone has been named the Maribel Shale[5]

Arcadia Park Shale
Stratigraphic range: Mid to Late Turonian
92.5–90 Ma
Unit ofEagle Ford Group
Sub-unitsKamp Ranch Limestone, Bells Sandstone, Maribel Shale, Sub-Clarksville Sandstone
UnderliesAustin Chalk
OverliesBritton Formation
OtherMarl, limestone, sandstone, volcanic ash beds
CountryUnited States
Type section
Named forArcadia Park railway station, Texas[1]
Named byW. L. Moreman[1]

Fossils that occur in the Arcadia Park include shark's teeth and other fish remains, ammonites, inoceramid clams, oysters, and foraminifera.[1]

The Sub-Clarksville Sandstone is a conventional source of oil production in East Texas.[6]

See alsoEdit


  1. ^ a b c d Adkins, W. S. (1932) The Mesozoic systems in Texas, in E. H. Sellards, W. S. Adkins, and F. B. Plummer, eds., University of Texas Bulletin 3232, 1007 p.
  2. ^ a b Denne, R. A., Breyer, J. A., Callender, A. D., Hinote, R. E., Kariminia, M., Kosanke, T. H., Kita, Z., Lees, J. A., Rowe, H., Spaw, J. M., and Tur, N. (2016) Biostratigraphic and geochemical constraints on the stratigraphy and depositional environments of the Eagle Ford and Woodbine Groups of Texas: in Breyer, J. A. (ed.), The Eagle Ford Shale: A renaissance in U.S. oil production, AAPG Memoir 110, p. 1-86.
  3. ^ Norton, G. H. (1965) Surface geology of Dallas County, in The geology of Dallas County: Dallas Geological Society, Dallas, Texas, p. 40–125.
  4. ^ Reid, W. T. (1952) Clastic limestone in the Upper Eagle Ford Shale, Dallas County, Texas: Field and Laboratory, v. 20, p. 111–122.
  5. ^ McNulty, C. L. Jr. (1966) Nomenclature of uppermost Eagle Ford Formation in northeastern Texas: AAPG Bulletin, v. 50, p. 375–379.
  6. ^ Wood, D. H., and A. B Giles (1982) Hydrocarbon accumulation patterns in the East Texas salt dome province: Bureau of Economic Geology Geological Circular 82-6, 36 p.