. Bulletins of American paleontology. Bulletin 365. Text-figure \.—A. Steptoean-Early Ibexian lithostratigraphy. Cherry Creek Range. B. Correlation of lithostratigraphic units immediately to the south of the study area, along an east-west transect from the House Range (west-central Utah) to the Hot Creek Range (central Nevada) (modified from Osleger and Read, 1993). STRATIGRAPHIC AND ENVIRONMENTAL SETTING Stratigraphy The Windfall Formation (Nolan et ciL. 1956) was established in the Eureka Mining District of east-cen- tral Nevada for a sequence of carbonates that overlies the shales and inter
. Bulletins of American paleontology. Bulletin 365. Text-figure \.—A. Steptoean-Early Ibexian lithostratigraphy. Cherry Creek Range. B. Correlation of lithostratigraphic units immediately to the south of the study area, along an east-west transect from the House Range (west-central Utah) to the Hot Creek Range (central Nevada) (modified from Osleger and Read, 1993). STRATIGRAPHIC AND ENVIRONMENTAL SETTING Stratigraphy The Windfall Formation (Nolan et ciL. 1956) was established in the Eureka Mining District of east-cen- tral Nevada for a sequence of carbonates that overlies the shales and interbedded carbonates of the Dunder- berg Formation. The formation has also been recog- nized to the east and northeast of Eureka, in the Cheiry Creek, northern Egan, and northern Schell Creek rang- es (Palmer, 1971). Nolan et al. (1956) divided the Windfall into, in ascending order, the Catlin and Bull- whacker members. In the type area, the Catlin is com- posed of two distinct lithologies. The lower nine me- ters consists of thick-bedded, light-colored lime mud- LU 7 Notch Peak Formation r* Q. E Bullwhacker g LL Member < 3 B c g Catlin Member Barton Canyon Mbr fc^ [ ^underburg a. Formation WEST HOT CREEK RANGE WHITE PINE RANGE EAST HOUSE RANGE Notch Peak Whipple Cave-Windfall Sneakover T Text-figure 2.—Locality Map. showing the measured section along the ridge at the north side of Barton Canyon, Cherry Creek Ranee. stones, and this is succeeded by about 75 meters of thin-bedded cherty carbonates. Farther to the east, in the northern Schell Creek Range, Young (1960) as- signed the lower, light-colored carbonates to the Bar- ton Canyon Limestone (named for. and well exposed at. the sample locality of this study), effectively re- stricting the Catlin to the overlying cherty carbonates. Subsequent workers { Palmer, 1965, 1971) have followed Young in separating the Barton Canyon from the Catlin, and the three-fold division of the Windfall Formation is used herein (Text-fig
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