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Filters: Collection Name: "Environmental Geology in Utah"
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51 Incipient landslide failure on subdivision road. Note characteristic arcuate configuration of ground surface, also patching along crack.Image
52 Landslide along a scarp of the East Bench Fault in Salt Lake City. No earth tremor is known to have triggered this slide, but an earthquake could trigger similar slides, given similar geologic conditions.Image
53 Landslide in Empire Canyon, Park City, in altered bedrock. Mining of metallic ores occurs just up the canyon. Park City lies just down-canyon. Switchbacks on road to Brighton have been wiped out; A further failure two years later took away even more of the hillside and dammed the creek in the canyon. Oblique aerial view.Image
54 Landslide of bedrock onto highway; a frequent problem for highway maintenance, sometimes necessitating blasting of large bedrock blocks.Image
55 Landslide scarp behind house along mountain front in Weber County.Image
56 Landslide scarplet "getting closer to home" in mountain subdivision.Image
57 Landsliding of an abutment encroaching on the reservoir which is near its peak stage (elevation). Structures for impoundment of flood waters must be sited with strict regard for geological conditions.Image
58 Large scale landsliding during construction of Interstate 80 in Echo Canyon. Bedding plane slide.Image
59 Leakage through the undisturbed abutment of an earthfill dam, measured in a wooden weir.Image
60 Looking across a dam towards a massive ancient landslide. Recent highway construction has rejuvenated landsliding just below the spillway; note receding hillside under arrow.Image
61 Looking downstream from the crest of the same earthfill dam (p1274n026). Note urban area at mouth of canyon.Image
62 Low sun angle illumination, vertical aerial photograph of large ancient landslide in urban environment at mouth of Ogden Canyon.Image
63 Map of Bear Lake showing bottom contours of the lake and depth to bedrock beneath soft valley sediments. The delta-fan areas along the east shore are colored yellow to indicate another hazard. Response of the delta-fan soft sediments to earthquake vibrations is anticipated to be poor, almost certainly causing severe damage to structures built on these level areas. Different earth materials may be expected to behave differently when shaken in an earthquake. The closeness of the contours bounding the delta-fans indicates a steep front for each. Movement of material in an earthquake may be expected to occur towards these steep fronts.Image
64 Map of portion of the Wasatch Front showing the Wasatch Fault Zone in relation to the Salt Lake City aqueduct system (with water system facilities as projected into the 20th Century). Map illustrates severity of the earthquake problem in urban Utah.Image
65 Map of Utah showing the 5 major active fault zones in the state.Image
66 Monument to campers who lost their lives in cloudburst flood in Sheep Creek Canyon, in Flaming Gorge National Recreational Area, 1963. Note: boulder on which bronze monument has been placed is striated and polished by glacial action in the ice age.Image
67 Mud-flow debris cleared from residence after storm on Salt Lake City's East Bench.Image
68 Mud-flow which occurred in same season in which photo was taken, in Tooele County. Cloudburst probably descended on the background watershed in the Oquirrh Range.Image
69 Mud-rock flow from upper steep-walled tributary canyon into Echo Canyon (Summit County) and over Interstate 80. Note that one lane of traffic has been cleared of debris. Aerial photo July 1968.1968-07Image
70 Multistory apartment house sitting astride the East Bench Fault of the Wasatch Fault Zone in Salt Lake City.Image
71 Nose of sagebrush-covered debris pointing out into grassy valley, in Sanpete County. Debris deposit was a sharply defined mud-rock flow.Image
72 Ogden Standard Examiner newspaper photograph of mudslide encroaching into dining room.Image
73 The old drainage below the dam through the city is now the site of numerous houses. Severe destruction would result from the dam failure.Image
74 Party of people viewing large landslide mass. Slide plane (surface along which mass of earth moved) is evident in photo half way down the exposed wall, sloping towards the party.Image
75 Pavement of Big Cottonwood Canyon Road, east of Salt Lake City, torn up by cloudburst flood in August 1969.1969-08Image
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