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u Upper Chlnie Interbedded siitstone, shale, and lime- No Information available. Not considered <br /> .n Triassic Formation 1,000 stone-pebble conglomerate. Reddish an aquifer in study area. <br /> brown in color. <br /> •�- lower Sholy siitstone, with interbedded silty Data for only one well obtained; water Is <br /> Triassic and State and shaiy medium-gralned sandstones a calcium bicarbonate typi. Dissolved- <br /> Upper Bridge 2,700 and silty thrles. Reodish brown and solids concantration is 489 mg/I. <br /> Permian Formation calcareous in places. Crossbedding <br /> and ripple marks locally present. <br /> Very'flne to medium-gralneJ, poorly sort- No Information available. May be an aqu{- <br /> ed, red to grey sandstone with Inter- for In outcrop area. <br /> Upper weber bedded siltstone and shale. The gray <br /> Permian Sandstone i00 color In the lower beds Is due to a . <br /> hydrocarbon stain on quartz grains. <br /> - Sor;ri �rng:o�!e rate. i^e.11y oresp.nt.- <br /> 1 <br /> Red, calcareous, arkosic sandstone and Reported well yields range from 5 to 25 <br /> PPm th.i. with Interbedded siitstone, gal/min. snare fractured ..cdnsfv.fy, <br /> Lower <br /> grayish-purple limestone, and arkosic may yield greater quantities of water to <br /> Pa rmlan conglomerate. Conglomerates are gen- wails. important source of water In <br /> and Upper Maroon 5,G00 orally massive, containing Igneous. Carbondale area and Crystal River drain- <br /> and Formation aetamorphle, and Isolated limestone age bosln, water is a calcium blcarbon- <br /> vanlan pebbles. Sandstones and shales are ate type In the Cattle Croak and Cerbun- <br /> often micaceous, nodular, and green dais areas and a todlun t44,tanate type <br /> H - In color. Crossoedding and ripple In the Crystal River drainage basin. I <br /> marks are locally present. otssoived-:oli a <br /> from 194 to 1,160 mg/1. <br /> T2 Interbedded gypsum, dark-gray to black Reported well yields range from 5 to 25 <br /> shale, and gypsiferous siitstone. gal/min. Used as a source of water in <br /> Shales are predominantly calcareous and the Carbondale and Cattle Crack areas. <br /> .a e Cagle contain iaterbeds of brownish sandstone. water Is a calcium sulfate type. We- <br /> Xlddl <br /> i PMiddl Valley Pav �,p00 Gypsum is generally massive, white, and solved-solids concentration ranges from <br /> = weathers to a dark gray. The formation 247 to 2,630 mg/1. The occurrence of <br /> s vanish Evaporite <br /> as.a whole weathers to a yeitowtsn-gray selenium is localized; concentrations <br /> color. Some beds may be holitic. In excess of U.S. Public Health Service <br /> (1962) drinking-water standards occur <br /> In the Cattle Crack and Carbondale areas. <br /> Minturn Formation limestone, 401omite, sandstone, slit- No Information available. <br /> • Gothic Formation stone, %held, quartzite, and soma <br /> of Langenhelm (1952) conglomerate. Rocks are generally <br /> Belden formation brownlsh, light gray to dark gray. <br /> r Lower loadvllle limestone PC. 4.650 hard, calcareous, and may be slightly <br /> ►ennsyl- <br /> ~ a wnlan Chd(tae <br /> nd Ma ni tou Format Ion to strongly metamorphosed. <br /> �_v a older Dolomite <br /> n Peerless Formation <br /> _ Sawatch Quartzite <br /> Table 783.I5-1 BEDROCK UNITS AND GROUND WATER USE, <br /> I <br /> I <br />