1987-12-01_PERMIT FILE - C1981017 (259)

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GEOLOGY Vaaoription of gaol Rio units -,Pt :hair-hydmo cbia p or9r:ias. Ha x 1 m.am Systems Series Geologic unit Symbol thickness Physical characteristics Hydrologic characteristics (feet) Clay, silt, sand, gravel, and boulders. Reported watt yields are as much as 25 Cotluvlum Qc SO Generally poorly sorted and angular. gal/min• Source 01 water for many Formed as a result of debris acoumu- springs. water quality dependant on lotion at foot of slopes. comgosltion of parent material. Clay, silt, sand, and gravel. Deposits Rsport-ed well yields are as much as 75 are eodarately to poorly sorted and pal/sin. Important source of wager In consist of either angular or rounded Cerbondais area. Water quality v►fl•ble fragments. and dependent on underlying bedrock and source of alluvial material. Water is Holocene i calcium sulfate type or a calcium blear- Donate type. Dissolved-solids concan- Ailuvlua Qal 200 oration ranges from 245 to 1.460 mg/1. Salani w occurs In eacsis of u.S, Public s- Health Sarvice (1962) drinking-water c standards where alluvium Is In contact a with the Eagle Valley Evaporlta. Hydflw- tic conductivity values range tram 1.0 ft/d In trio Cattle Croak valley to 100 ft/d In the Roaring Fork River valley. 011vine basalt, dark-gray, mcdaraCaly to Reported .wit yields generally range from highly vesicular and often dense. Com- 25 to 50 gal/min; yields of 100 gal/aia mo mangy jointed and fractured and weach- are not uncomn In collapsed areas. ers to a reddish-brown color. Basalt is primary source of water In Cat- tle Creak drainage basin; no Information Pleistocene Basalt Qb 1,000 available for basalt In western part of Crystal River drainage basin. Water is A calcium bicarbonate type. Dissolved- solids concentration rangss from.III to 475 C1g/l. Hydraulic conductivity value* range from 1.0 to 40 ft/d. • Predominantly granodiorite end quartz Mo {nformation ovallabis. Hat an aquifer Plioco"a ;Indeter- monzonite, lignt-gray to_brown, medium- in study area. A ocene Igneous rocks TI minote grained, dense, and hard. Fracturing -� 011yocene and Jointing common. s Claystone, rwdstone, and shale with in- Ho information available. Not an aqulfsr Wasatch tsrbeds of slitstone and conglomerate. In study area. Tw 6,000 Coarser ain Eocene Formacion gr ed beds tend to be arkosic and lenticular. lnterbodded sandstone, shalt' sand, shale, Data for only one well obtained; water is and coal. Sandstones are tan in color, ( a calcium bicarbonate type. Dissolved- _ nesaverds Rev 2,700 massive, and form prominent ridges. solids concentration Is 181 mg/1- Formation Shales are greenish gray and locally carbonaceous. Coals are economically Upper important. Cretaceous aOark-gray shale, with Interbedded sand- Data for only one wall obtained; avatar It v. ManCos stone, slltstone, and limestone. • calcium bicarbonata type. Dissolved- IKA 4,000 'ZIShale Shales are calcareous and slightly sollas concentration Is 217 m%/1. carbonaceous. Locally fossiliferous. y Predominantly light-gray. very fine to No Information available. Hey be an Aqul- Dakota Sandstone medium, welt-sorted, well-cemented, far in outcrop area. lower and sandstone with shale and siltstone Cretaceous Barra Canyon 300 interbads.. Chert-pebble conglomeratas Formation are cocsnon. The sandstone weathers to a rust-brown color and forms ridges. Varicolored shale with Interbedded light-1 40 Information available. tlay be an aqul- gray sandstone and siltstone and dark- ' far In outcrop are•. Morrison gray limestone. Sandstone beds are Formation 325 more pronlnent In the lower part of i 1 the formatleon; limestone beds, In the ^ middle. K Upper Jurassic KPu Sandstone, yoliowish-gray to gray, vary INo Informatics available. May be an aquf- Entreda i>0 fine to medium, well-sorted, cross- for In outcrop area. Sandstone bedded, and calcareous. Weathers to an orange-gray color; forms ridges.