Named the uppermost member of Nesson formation; overlies Picard member (new); underlies Piper formation. Type section is interval 4,386 to 4,533 ft in Price Drilling Co. No.1 Kline well, center SE1/4 SE1/4 SE1/4 sec 16, T157N, R85W, Ward Co, ND. At type section, consists of (descending): 34 ft of light-gray to white, earthy dolomite and fine-grained sandstone; 13 ft of gray-green to purple calcareous shale containing white gypsum; 37 ft of light- to dark-brown finely crystalline limestone, oolitic in part and becoming shaly toward base; 63 ft of light-gray to buff fine- to medium crystalline limestone, earthy, gypsiferous and fossiliferous in part. Pinches out by nondeposition short distance east of Big Snowy uplift and wedges out in like manner on west flank of Bowdoin dome. On west margin of Williston basin, unconformably overlies either Mississippian, Pennsylvanian, or Triassic beds. Has no recognized outcrop sections. Assigned to Early? or Middle Jurassic.
Source: GNU records (USGS DDS-6; Denver GNULEX).
Revised--formerly a member of Nesson formation. Included in Piper Formation (revised) in this report. Overlain by Tampico Member and underlain by Picard Member, both of Piper Formation. Is Jurassic in age.
Source: GNU records (USGS DDS-6; Denver GNULEX).
Assigned as a member of Nesson Formation. Is Middle Jurassic (Bajocian) in age. Is in central and eastern MT and western ND, Williston basin. Summarizes lithology, basis for dating, distribution, and correlation.
Source: GNU records (USGS DDS-6; Denver GNULEX).
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