Fossil occurrence.—Fossils are rare in the Mesaverde group of the San Juan basin, New Mexico; therefore any new discoveries of diagnostic forms merit attention. In the course of field work in May, 1960, the writers collected ammonites from a locality at the northwest side of Dalton Pass, McKinley County, New Mexico, in the SW. of Sec. 14, T. 17 N., R. 14W. (unsurveyed). This is slightly more than a mile southwest of the old Shellenberg’s Store shown on Plate 1 of Sears (1934). The stratigraphic horizon is the lower part of the Hosta tongue of...
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