QUATERNARY 

-     disturbed ground
-     Alluvium; upper and middle Quaternary 
-     Landslide deposits and colluvium
-     Eolian deposits
-     Gypsiferous eolian deposits
-     Glacial deposits; till and outwash: upper and middle Pleistocene
-     Lacustrine and playa-lake deposits;  includes associated alluvial 
         and eolian deposits of major lake basins; upper Quaternary
-     Piedmont alluvial deposits: upper and middle Quaternary; includes 
         deposits of higher gradient tributaries bordering major stream 
         valleys, alluvial veneers of the piedmont slope, and alluvial fans 
-     Basalt and andesite flows and locally vent deposits 
-     Silicic volcanic rocks
-     Basaltic volcanics; tuff rings, cinders, and proximal lavas
-     Basalt or basaltic andesite; middle and lower Pleistocene
-     Valles Rhyolite; Jemez Mountains area only
-     Bandelier Tuff; Jemez Mountains area only
-     Older alluvial deposits of upland plains and piedmont areas, 
         and calcic soils and eolian cover sediments of High Plains region; 
         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; upper Quaternary 
         to uppermost Pliocene(?)

                       QUATERNARY and TERTIARY

-     Older piedmont alluvial deposits and shallow basin fill;  includes 
         Quemado Formation and in northeast, high level pediment gravels
-     Basaltic and andesitic volcanics interbedded with Pleistocene 
         and Pliocene sedimentary units
-     Travertine
-     Gila Group.  Includes Mimbres Formation and several informal units
         in southwestern basins; Middle Pleistocene to uppermost Oligocene    
-     Santa Fe Group, undivided.  Basin fill of Rio Grande rift region; 
         middle Pleistocene to uppermost Oligocene  
-     Upper Santa Fe Group.  Includes Camp Rice, Fort Hancock, Palomas, 
         Sierra Ladrones, Ancha, Puye, and Alamosa Formations; middle 
         Pleistocene to uppermost Miocene

                               TERTIARY

-     Upper Tertiary sedimentary units; includes Bidahochi Formation, 
         the Picuris Formation, and Las Feveras Formation, and locally 
         fanglomerates; Pliocene to upper Miocene
-     Fence Lake Formation; conglomerate and conglomeratic sandstone, 
         coarse fluvial volcanoclastic sediments, minor eolian facies, 
         and pedogenic carbonates of the southern Colorado Plateau region; 
         Miocene 
-     Lower and Middle Santa Fe Group. Includes Hayner Ranch, Rincon 
         Valley, Popotosa, Cochiti, Tesuque, Chamita, Abiquiu, and other 
         Formations; Miocene and uppermost Oligocene
-     Ogallala Formation, alluvial and eolian deposits, and petrocalcic 
         soils of the southern High Plains;  Lower Pliocene to middle Miocene 
         (locally includes unit Qoa) 
-     Los Pinos Formation of Lower Santa Fe Group (Miocene and upper 
         Oligocene); includes Carson Conglomerate (Dane and Bachman, 1965) 
         in Tusas Mountains-San Luis Basin area
-     Mostly Oligocene and upper Eocene sedimentary and volcaniclastic 
         sedimentary rocks with local andesitic to intermediate volcanics; 
         includes Espinaso, Spears, Bell Top, and Palm Park Formations
-     Hinsdale Basalt; northern Taos and eastern Rio Arriba Counties; 
         basalt flows interbedded with Los Pinos Formation
-     Basalt and andesite flows; Neogene.  Includes flows interbedded 
         with Santa Fe and Gila Groups
-     Basalt and andesite flows; Pliocene
-     Basalt and andesite flows; Miocene