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Show Table 1.- Generalized stratigraphic summary of the consolidated rocks of the Heber- Kamas- Park City area Age Formation Lithology and thickness Water- bearing properties Quaternary Tufa deposits Calcareous tufa deposited from the water of thermal springs. Nearly pure calcium carbonate. Very porous. Thickness unknown, but locally exceeds 70 feet. Yields some water to wells. Numerous warm springs flow from tufa deposits, but source of water is probably underlying beds. Tufa apparently is permeable and transmits water readily. Extrusive igneous rocks Chiefly andesitic pyroclastics with some intercalated flow rocks, includes Keetley Volcanics and Tibbie Formation. Thickness uncertain, but reportedly may exceed 1,000 feet. Yields some water to wells, chiefly in the Parleys Park area, and to numerous small springs. Most of the observed springs are along fractures or contacts. Transmissivity estimated from drillers1 reports as about 270 ft3/ d/ ft. Tertiary Intrusive igneous rocks Includes a few small bodies of basic rocks in the Uinta Mountains and many large masses of granitic rocks in the Wasatch Range. Thickness unknown. Intrusive rocks yield some water to mine tunnels from fractures, but have little significance as aquifers in the area. Fowkes Formation Tuffaceous and limy beds and local conglomeratic lenses. Thickness and stratigraphic relations uncertain. Present only in extreme northwestern part of the study area. Not known to yield water in the study area. Uinta Formation Fluvial and lake deposits. Present only in the extreme south end of the study area. Thickness in the area unknown. Not known to yield water in the study area, but reportedly supplies some wells locally in the Uinta Basin to the southeast ( Feltis, 1966). Knight Conglomerate Gray and reddish conglomerate in massive beds, chiefly fluvial. Thickness as much as 2,000 feet. Yields water to a few wells in the northern part of the study area. Transmissivity probably less than 135 ft / d/ ft. Tertiary and Cretaceous Wanship Formation of Eardley ( 1952) Marine sandstone and shale. Thickness as much as 5,000 feet. Not known to yield water in the study area. Echo Canyon Conglomerate of Eardley ( 1944) Conglomerate and conglomeratic sandstone and some shale and a few coal beds. Thickness at least 3,100 feet. Not penetrated by wells in the study area, but supplies a few springs. 3 Frontier Formation Nonmarine and marine sandstone, shale, and coal. Thickness more than 2,100 feet. Not penetrated by wells in the study area. Probable source of a few small springs. Cretace Price River Formation Conglomerate and shale. Thickness as much as 1,500 feet, but probably less in the study area. Present only in the extreme south end of the area. Not known to yield water in the study area. Aspen Shale Dark gray marine shale. Thickness about 250 feet. Do. Kelvin Formation Continental deposits, predominantly red colored. Thickness about 1,500 feet. Not penetrated by wells in the study area, but supplies a few springs. Morrison Formation Continental deposits, locally containing abundant dinosaur remains. Thickness uncertain, perhaps as much as 1,200 feet. Not known to yield water in the study area. I Preuss Sandstone Nonmarine siltstone and sandstone. Thickness probably more than 1,000 feet. Yields small amounts of water to a few wells in the area. Insufficient data to estimate transmissivity. 3 Twin Creek Limestone Light- colored splintery limestone. Thickness as much as 2,000 feet. Yields water to several wells and springs in the area, probably from fractures and solution cavities. Data suggest transmissivity of less than 135 ft3/ d/ ft. Jurassic(?) and Triassic(?) Nugget Sandstone Crossbedded eolian sandstone, generally some shade of red. Thickness as much as 1,200 feet. Yields water to several wells in the area. Transmissivity generally low ( about 65 ft / d/ ft) but locally as high as 335 ft3/ d/ ft. Chinle Formation Mixed nonmarine sediments, generally red. Thickness uncertain, probably less than 500 feet. Yields small amounts of water to wells in the Parleys Park area. Transmissivity probably less than 135 ftJ/ d/ ft. Shinarump Member of the Chinle Formation Fluvial sandstone and conglomerate. Thickness about 100 feet in the study area. Not known to yield water in the study area. 1 Ankareh Formation Chiefly red siltstone, sandstone, and shale. Thickness more than 1,000 feet. Yields a little water to wells in the Parleys Park area from sandy beds. Insufficient data to estimate transmissivity. Tri Thaynes Formation Calcareous marine sediments. Thickness more than 2,000 feet. Yields some water to a few wells and springs, largely from fractures and solution openings. Insufficient data to estimate transmissivity. Woodside Formation Red siltstone, sandstone, and shale. Thickness about 500 feet. Reportedly yields water to the mine tunnels in the Park City area from fractures. Park City Formation Limestone, phosphorite, cherty siltstone,. and shale. Thickness about 1,500 feet. Not tapped by wells in the study area, but reportedly yields some water in the Uinta Basin ( Feltis, 1966). rmian Diamond Creek Sandstone Light- colored crossbedded sandstone. Thickness up to 1,000 feet. Present only in the extreme south end of the study area. Neither of these two formations is sufficiently extensive in the study area to be important as aquifers. No wells in the area tap either formation, but a few small springs in the extreme south end of the area produce water from one or both of these formations. EL, Kirkman Limestone Dark- colored, brecciated, thin- bedded limestone. Thickness up to 1,600 feet. Present only in the extreme south end of the study area. Permian and Pennsylvanian Oquirrh Formation Interbedded sandstone and limestone containing some shale and siltstone. Thickness as much as 8,000 feet, but probably less in the study area. Present only south of Heber City. Yields some water to wells and springs, chiefly from fractures and solution openings. Transmissivity estimated as about 270 ft3/ d/ ft. 19 |