The Morrison Formation in the Gallup region

Geology of Fort Wingate Quadrangle, McKinley County, New Mexico

“…Other paleocurrent-direction data and observations exist. Saucier (1967) noted that in the Gallup area the average of a number of readings was N13°E. Our observations in the nearby Church Rock and Thoreau areas indicate eastnortheasterly paleocurrent directions in the Salt Wash Member.…”

“…The inferred presence of feldspar, however, suggests intrusive rocks were present in the source area. Saucier (1967) reported finding volcanic material such as sanidine (high-temperature K-spar) and doubly terminated bipyramidal quartz crystals. In addition Saucier noted that 90% of the conglomerate clasts consisted of sedimentary rocks (quartzite, chert, and sandstone), the remainder being largely welded tuff or rhyolite.…”

Summary of the geology and resources of uranium in the San Juan Basin and adjacent region, New Mexico, Arizona, Utah, and Colorado

“…Some of the sandstones, however, are considered to be eolian in origin (Harshbarger and others, 1957, p. 53; Huffman and Lupe, 1977). Deposition of this facies is considered to have taken place at the toe of an alluvial fan that extended northward from west-central New Mexico (Craig and others, 1955;Saucier, 1967).…”