Cienequita Formation (TXPAci;0)

State	Texas
Name	Cienequita Formation
Geologic age	Phanerozoic \| Paleozoic \| Carboniferous Pennsylvanian-Middle Pennsylvanian-Late
Original map label	IPci
Comments	Alternating beds of quartz pebble conglomerate, ferruginous sandst., sandy shale, and brecciated masses of reef Limestone; ss fine grain, muscovitic, irreg bedding; ls in part locally derived limestone-pebble conglo. in part contains pebbles of vein quartz; some blk shale metamorphosed to hornfels; thickness more than 2,000 ft; exposed in no. part of Chinati Mtns.
Primary rock type	coarse-grained mixed clastic
Secondary rock type	sedimentary breccia
Other rock types	black shale; hornfels
Lithologic constituents	Major Sedimentary > Clastic > Mixed-clastic > Conglomerate-sandstone (Bed) Minor Sedimentary > Clastic > Mudstone > Shale (Bed) Sedimentary > Carbonate > Limestone (Bed) Incidental Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed)
Map references	Bureau of Economic Geology, 1992, Geologic Map of Texas: University of Texas at Austin, Virgil E. Barnes, project supervisor, Hartmann, B.M. and Scranton, D.F., cartography, scale 1:500,000
Unit references	Bureau of Economic Geology, 1992, Geologic Map of Texas: University of Texas at Austin, Virgil E. Barnes, project supervisor, Hartmann, B.M. and Scranton, D.F., cartography, scale 1:500,000
Geographic coverage	Presidio