GEOLEX

Summary of Citation: Fontenelle

Publication:
Donavan, J.H., 1950, Intertonguing of Green River and Wasatch
   formations in part of Sublette and Lincoln Counties, Wyoming:
   Wyoming Geological Association Field Conference Guidebook,
   no. 5, p. 59-67

Usage in Publication:
Fontenelle member

Modifications:	Geologic Province:	Dominant Lithology:
Named	Greater Green River basin	Sandstone Shale

Summary:
Named as a basal member of Green River formation for exposures about one-half mile south of Fontenelle Creek, Lincoln Co, WY in the Greater Green River basin. Extends into adjoining Sublette Co. Type locality is in sec 13, T24N, R114W. Conformably overlies Knight member of Wasatch, an easily recognized contact--of varicolored Knight beneath a persistent, buff, minutely cross-laminated sandstone of Fontenelle. Consists of alternating buff-brown, fine- to coarse-grained, thin-bedded to thick-bedded to blocky sandstone, and green and gray mudstone. In some places, the sandstones are lenticular or discontinuous with well developed laminations. Brick-brown concretions found in some of the thicker sandstones. Thin conglomerates of well-rounded pebbles and cobbles from Mesozoic rocks. Near Green River-New Fork River junction, about 6 mi east of Big Piney, Fontenelle interfingers with varicolored New Fork tongue (new) of Wasatch formation. In sec 14, T28N, R114W, the variegated New Fork is missing, and the entire sequence (300 ft thick) is alternating sandstone and shale of Fontenelle. Is a shoreline delta deposit. Fossil gastropods (listed). Is overlain by Laney member of Green River. May correlate with Tipton tongue of Green River. Cross section. Geologic map. Of Middle Eocene age.

Summary of Citation: Fontenelle

Publication:
Bradley, W.H., 1959, Revision of stratigraphic nomenclature of
   Green River formation of Wyoming: American Association of
   Petroleum Geologists Bulletin, v. 43, no. 5, p. 1072-1075

Usage in Publication:
Fontenelle tongue*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Greater Green River basin

Summary:
Stratigraphic rank term accepted as tongue, rather than member, of Green River formation in the Greater Green River basin. Is thought to merge downdip with the rest of the Green River. Thought to be contemporaneous with the Tipton tongue of the Green River. Is the equivalent of the Cathedral Bluffs and Tipton tongues of the Green River. Of Eocene age.

Summary of Citation: Fontenelle

Publication:
Oriel, S.S., 1961, Tongues of the Wasatch and Green River
   formations, Fort Hill area, Wyoming, IN Geological Survey
   research 1961; short papers in the geologic and hydrologic
   sciences; Articles 1-146: U.S. Geological Survey Professional
   Paper, 424-B, p. B151-B152

Usage in Publication:
Fontenelle tongue*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Greater Green River basin

Summary:
Restricted stratigraphically in the Fort Hill area, Lincoln Co, WY in the Greater Green River basin, as a tongue of the Green River formation to only the basal 50 to 60 ft of the Fontenelle as defined by Donovan (1950). The overlying rocks formerly part of the Fontenelle, in the Fort Hill area where they are green (not red) mudstone and brown sandstone, are reassigned to the New Fork tongue of the Wasatch formation. Fontenelle conformably overlies the main body of the Wasatch formation. As restricted, consists of very thinly laminated, light-gray to white muddy limestone, marlstone, calcareous very fine grained sandstone, and calcareous mudstone. Of early Eocene age.

Summary of Citation: Fontenelle

Publication:
Oriel, S.S., 1962, Main body of the Wasatch Formation near La
   Barge, Wyoming: American Association of Petroleum Geologists
   Bulletin, v. 46, no. 12, p. 2161-2173

Usage in Publication:
Fontenelle Tongue*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Greater Green River basin

Summary:
Eocene Fontenelle Tongue of Green River Formation overlies and intertongues with the La Barge Member (new name) of main body of Wasatch Formation in the Greater Green River basin of southwest WY. Intertongues westward into conglomerate member of Wasatch Formation, which is a facies peripheral to the basin.

Summary of Citation: Fontenelle

Publication:
Sullivan, Raymond, 1980, A stratigraphic evaluation of the Eocene
   rocks of southwestern Wyoming: Wyoming Geological Survey
   Report of Investigations, no. 20, 50 p.

Usage in Publication:
Fontenelle Tongue

Modifications:	Geologic Province:	Dominant Lithology:
Not used

Summary:
Work by several authors has shown that the Fontenelle Tongue of the Green River Formation is equivalent to the Tipton Shale Member of the Green River. Term Fontenelle should be "discarded."

Summary of Citation: Fontenelle

Publication:
Roehler, H.W., 1991, Revised stratigraphic nomenclature for the
   Wasatch and Green River Formations, IN Geology of the Eocene
   Wasatch, Green River, and Bridger (Washakie) formations,
   greater Green River basin, Wyoming, Utah, and Colorado: U.S.
   Geological Survey Professional Paper, 1506-B, p. B1-B38

Usage in Publication:
Fontenelle Tongue

Modifications:	Geologic Province:	Dominant Lithology:
Not used

Summary:
Donavan's (1950) Fontenelle Tongue (about 350 ft thick) of Green River Formation on Fontenelle Creek was bounded by the Knight Member of the Wasatch Formation below and New Fork Tongue of Wasatch above. The Fontenelle was later restricted (Oriel, 1961) to lower 50 ft of the original unit, and then Lawrence (1963) modified the restricted Fontenelle to include an additional overlying 75 ft. Lawrence's 125 ft thick Fontenelle was reassigned to the Tipton Shale Member of the Green River Formation by Sullivan (1980). The name Fontenelle which has had several definitions is not used in this report. The interval named Fontenelle by Donavan in the Fontenelle Creek area is redesignated (ascending): Scheggs Bed (new) of Tipton Shale Member and Farson Sandstone Member (new) of Green River Formation, and Alkali Creek Tongue (new) of Wasatch Formation in this report. Stratigraphic diagrams.