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STRUCTURE OF SLICK ROCK DISTRICT AND VICINITY C3
<br /> TAB us 1.Summary of consolidated sedimentary rocks in the Stick Rock district
<br /> Axe Formation and member Thickness(is") Description
<br /> Mancos Shale 1,600-2,300 Dark-gray carbonaceous,calcareous shale.
<br /> Late Cretaceous
<br /> Dakota Sandstone 120-180 Light-buff sandstone and conglomeratic sandstone,dark-gray
<br /> carbonacoous shale,and coal.
<br /> Early Cretaceous Burro Canyon Formation 40-400 Light-gray to light-buff sandstone and conglomeratic sand-
<br /> stone• greenish-gray and gray shale, siltatone, limestone,
<br /> and cart.
<br /> Morrison Formation,Brushy 300-700 Reddish-brown and greenish-gray mudstone,siltatone,sand-
<br /> Basin Member stone,and conglomerate.
<br /> Late Jurassic
<br /> Morrison Formation,Salt Wash 275-400 Light-reddish-brown, light-buff, and light-gray sandstone
<br /> Member and reddish-brown mudetone.
<br /> Junction Creek Sandstone 20-150 Light-buff sandstone.
<br /> Summerville Formation 80-160 Reddish-brown siltatone and sandstone.
<br /> Entrada Sandstone,Slick Rock 70-120 Light-buff to light-reddish-brown sandstone.
<br /> Member
<br /> Entrada Sandstone, Dewey 20-35 Reddish-brown silty sandstone.
<br /> Bridge Member
<br /> Jurassic and Navajo Sandstone 0-420 Light-buff and light-reddish-brown sandstone.
<br /> Triassic(?)
<br /> Late Triassic(?) Kayenta Formation 160-200 Purplish-gray to purplish-red siltatone, sandstone, shale,
<br /> mudetone,and congoomerate.
<br /> Wingate Sandstone 200-400 Light-buff and light-reddish-brown sandstone.
<br /> Chinle Formation,Church 340-500 Reddish-brown, purplish-brown, and orangish-brown sand-
<br /> Late Triassic Rock Member stone, siltatone, and mudatone; dark-greenish-gray eon-
<br /> Qlmm�ratn.
<br /> Chinle Formation,Petrified 0-100 Greenish-gray mudetone, siltatone, shale, sandstone, and
<br /> Forest(?) Member conglomerate.
<br /> Chinle Formation,Moss Back 20-75 Light-greenish-gray and gray sandstone and conglomerate;
<br /> Member. minor grocrosh-gray and reddish-brown mudetone, silt-
<br /> stone,and shale.
<br /> Middle(?)and lloonkopa Formation 0-200 Light-reddish-brown entstone and sandy siltatone.
<br /> Early Triassic
<br /> Early Permian Cutler Formation 1,500-3,000 Reddish-brown, orangish-brown, and light-buff sandstone,
<br /> siltatone,mudetone,and shale.
<br /> Late and Middle Rico Formation 130-240 Transitional between Cutler and Hermosa Formations.
<br /> Pennsylvanian
<br /> Hermosa Formation,upper 1,000-1,800 Light- to dark-gray limestone; gray, greenish-gray, and
<br /> limestone member reddish-gray shale and sandstone.
<br /> Hermosa Formation, Paradox 3,250-4,850 Upper and lower unite gray dolomite, limestone, and dark-
<br /> Middle Penn- Member gray shale interbedded with evaporates; middle unit
<br /> sylvanian halite and minor gypsum, anyhdrite, dolomite,limestone,
<br /> and black shale.
<br /> Hermosa Formation,lower 100-150 Medium-gray limestone,dark-gray shale.
<br /> limestone member
<br /> Early Pennsyl- Molm Formation 100 Reddish-brown,dark-gray,and greenish-gray shale and silty
<br /> vanian and shale and gray limestone.
<br /> Mississippian
<br /> Mississippian Leadville Limestone 240 Medium-gray limestone and dolomite.
<br /> Devonian Name not assigned 250-550 Gray sandy dolomite and limestone and grayleh-green and
<br /> reddish sandy shale.
<br /> Cambrian Name not assigned 500-700 Light-gray to pinkish conglomeratic sandstone, sandstone,
<br /> ailtatone,shale,and dolomite.
<br /> Precambrian Name not assigned -------------- Granitic to amphlbolitic gneieaes and schists,and granite.
<br /> Structure of Slick Rock District (Shawe, 1970)
<br /> Slick Rock Project Groundwater Sampling and Analysis Plan- 2025
<br /> Slick Rock NOI Modification July 2025
<br /> Appendix C Page 4 of 35
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