GEOLEX

Summary of Citation: Rockhouse

Publication:
Dunbar, C.O., 1918, Stratigraphy and correlation of the Devonian
   of western Tennessee: American Journal of Science, 4th series,
   v. 46, p. 732-756

Usage in Publication:
Rockhouse shale*

Modifications:	Geologic Province:	Dominant Lithology:
Named	Cincinnati arch	Shale Limestone

Summary:
Rockhouse shale, introduced in this report, is a bluish-green or greenish-gray calcareous glade-forming shale interbedded with occasional thin bands of light-gray crystalline limestone. Fauna is very early Devonian--near Silurian-Devonian boundary. Treated as basal formation of Helderbergian or Linden group. Occurs in southern part of Hardin Co. Unconformably underlies Ross limestone (basal member of Olive Hill formation) and disconformably overlies Decatur limestone. Maximum thickness 26 ft at Rockhouse, a hunter's clubhouse on Horse Creek, 5 mi northwest of Lowryville, for which it is named.

Summary of Citation: Rockhouse

Publication:
Wilson, C.W., Jr., 1949, Pre-Chattanooga stratigraphy of central
   Tennessee: Tennessee Division of Geology Bulletin, no. 56,
   407 p.

Usage in Publication:
Rockhouse shale member and limestone member

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Cincinnati arch

Summary:
Rockhouse shale member and Rockhouse limestone member compose the basal unit of the newly defined Ross formation through its known outcrop belt and unconformably overlie Decatur limestone. Shale member is restricted to south-central Hardin Co., where its average thickness is about 25 ft. It conformably underlies Ross limestone member. Rockhouse Limestone member is widely distributed in northern Hardin and Wayne Cos. where its average thickness is about 12 ft. Conformably underlies Birdsong shale member and includes basal 8 to 10 ft of Birdsong shale as described by Dunbar (1919). Cooper and others (1942) place Rockhouse shale in Silurian. If Rockhouse shale is Silurian then entire Ross formation including Ross limestone member and Birdsong shale member are likewise Silurian because they bear a close relationship to the Rockhouse shale member and Rockhouse limestone member.

Summary of Citation: Rockhouse

Publication:
Broadhead, T.W., Capaccioli, D.A., McComb, R., Reid, S.R. and
   Walker, K.R., 1988, Late Silurian and Early Devonian marine
   sedimentation near the southern margin of the North American
   craton, IN McMillan, N.J., Embry, A.F., and Glass, D.J.,
   eds., Devonian of the World; proceedings of the 2nd international
   symposium on the Devonian System; Volume II, Sedimentation:
   Canadian Society of Petroleum Geologists Memoir, 14, p.
   197-208

Usage in Publication:
Rockhouse Shale Member/Limestone Member

Modifications:	Geologic Province:	Dominant Lithology:
Overview	Cincinnati arch

Summary:
Rockhouse Shale and Limestone Members of Ross Formation are lateral equivalents. Rockhouse Shale Member occurs to the south and underlies Ross Limestone Member of Ross Formation. It interfingers with Rockhouse Limestone Member to the north. Rockhouse Limestone Member gradationally underlies Birdsong Shale Member. Thickness averages 3 to 4 m. Age of the Limestone Member is Early Devonian, while the Shale Member is Late Silurian and Early Devonian.

Summary of Citation: Rockhouse

Publication:
Petersen, L.E. and Lundin, R.F., 1992, Lower Devonian Ostracoda
   in western Tennessee, IN Chaplin, J.R., and Barrick, J.E.,
   eds., Special papers in paleontology and stratigraphy; a
   tribute to Thomas W. Amsden: Oklahoma Geological Survey
   Bulletin, no. 145, p. 161-180

Usage in Publication:
Rockhouse Formation/"Rockhouse" Limestone

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Cincinnati arch

Summary:
As used in this report, the Rockhouse Formation is the same as Wilson's (1949) Rockhouse shale member of his Ross formation and Dunbar's (1919) Rockhouse shale. Formation is the preferred term as there is no true shale in the unit. It consistently overlies the Decatur Limestone and underlies the Ross Limestone. On the other hand, the same term should not be used for the limestone unit and therefore "Rockhouse" is placed in quotation marks. Authors state it is not within the scope of this paper to propose a new name for this unit. This is the same unit referred to as Rockhouse limestone member of Ross formation by Wilson (1949). Field investigations and analysis of ostracode fauna indicate that the Birdsong Formation, the Rockhouse Formation, the "Rockhouse" Limestone, and the Ross Limestone represent facies of a single depositional episode.

Summary of Citation: Rockhouse

Publication:
Harris, A.G., Weary, D.J. and Repetski, J.E., 1995, Conodont
   distribution in uppermost Ordovician through Lower Devonian
   rocks, du Pont Geohydrological Survey well, near Waverly,
   Humphreys County, Tennessee, IN  Broadhead, T.W., and Gibson,
   M.A., eds., Upper Silurian-Lower Devonian biotas and
   paleoenvironments of the western Tennessee shelf: University
   of Tennessee, Department of Geological Sciences Studies in
   Geology, no. 25, p. 23-27, Also, 1995, Geological Society of
   America, Southeast Section, 44th Annual Meeting, Guidebook
   for Field Trips, no. 4.

Usage in Publication:
Rockhouse Limestone Member*

Modifications:	Geologic Province:	Dominant Lithology:
Biostratigraphic dating	Cincinnati arch

Summary:
The conodont ICRIODUS WOSCHMIDTI? occurs in three samples (507.5 to 518.8 ft) from uppermost Decatur and overlying Rockhouse Limestone Member of Ross Formation in the du Pont Geohydrological Survey well near Waverly, Humphreys Co., central TN. I. WOSCHMIDTI is an auxiliary guide to base of Devonian. Authors believe, but cannot prove, that the specimens in the well are I. WOSCHMIDTI because collections made by Harris from upper part of Decatur near Parson's quarry, Decatur Co., TN, about 35 mi south-southwest of du Pont well produced abundant I. WOSCHMIDTI 5 ft below top of Decatur.