Alluvial and eolian deposits, and petrocalcic soils of the southern High Plains. Locally includes Qoa.
Consists of Dakota Group, which includes Romeroville Sandstone (Cenomanian), Pajarito Shale, and Mesa Rica Sandstone (Albian); the underlying Tucumcari Shale (Albian) in Tucumcari area and Glencairn Formation (Albian) in Union County.
Alluvium
Entrada Sandstone
Eolian deposits.
Morrison Formation and upper San Rafael Group
Bull Canyon Formation
Upper Chinle Group, Garita Creek through Redonda Formations, undivided
Includes minor vent deposits and small shield volcanoes. Flows are commonly interbedded in the Santa Fe and Gila Groups.
In southwest includes the basalt-bearing Broken Jug Formation.
Limited to northeastern area; the upper member (Bridge Creek Limestone) can be traced into western area where it is commonly shown as a bed-rank unit in Mancos Shale on detailed maps.
Limited to northeastern area.
Map unit includes Moenkopi Formation (Middle Triassic) at base in many areas; in eastern part of state the following five formations are mapped: TRr, TRb, TRt, TRg, and TRs.
Includes minor vent deposits. Flows are commonly interbedded in the Santa Fe and Gila Groups.
Redonda Formation
Limited to northeastern area.
Landslide deposits on western flanks of Socorro Mountains not shown for clarity.
Includes scattered lacustrine, playa, and alluvial deposits of the Tahoka, Double Tanks, Tule, Blanco, Blackwater Draw, and Gatuna Formations, the latter of which may be Pliocene at base; outcrops, however, are basically of Quaternary deposits.
Includes associated alluvial and eolian deposits of major lake basins.
Upper Jurassic nonmarine rocks.
Limited to northeastern area.