Photo Archives
 
Filters: Collection Name: "Environmental Geology in Utah" Type: "Image"
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51 Damage to newly laid curb and gutter on Salt Lake City's East Bench, resulting from August 1969 cloudburst.1969-08Image
52 Damage to the Salt Lake City Cemetery from a flood channeled in Perry's Hollow, a normally dry drainage course.Image
53 Aerial photograph showing same swath and slide as on topographic map. Arrow points to displaced mass from swath behind it in mountain range.Image
54 Ancient landslides show up on maps with scales as small as one inch to the mile. Three such ancient slides are pointed out along the mountain front in Juab County. Note swath of anomalous contours leading down to lowermost slide, obviously the path of bedrock which failed.Image
55 Another example of dynamic forces at work in the geologic environment: pressure ridges formed in the salt crust of Utah's Bonneville Salt Flats. These ridges grow and shrink seasonally.Image
56 Areas of carbonate rock (limestone) outcrops (in blue) in the vicinity of Bear Lake, Utah. Rocks range in age from Cambrian to Jurassic. Development on the outcrop area should be closely monitored to protect the underlying potable water aquifer.Image
57 Arrow points to incipient failure of an excavation wall for a foundation for a multistory office building. Material is horizontally stratified Lake Bonneville silts and sands.Image
58 Bear Lake area map showing: (1) point of issue of Swan Creek Spring, (2) possible contributory sink holes (in red) in the Bear River Range, (3) precipitation (rain and snow) measuring stations (in bluelined blocks).Image
59 Big Cottonwood Creek flooding in Salt Lake City. Numerous houses along its banks were flooded in 1952.1952Image
60 Blasting for an interstate highway in the immediate vicinity of a dam. Concrete railing of dam appears in lower right corner. Vibrations, whether natural (earthquake) or manmade, may damage structures on sensitive foundations.Image
61 Branch of the Wasatch Fault exposed in utility trench excavation in Salt Lake City. Hammer and field book are at the same stratigraphic horizon, indicating a displacement of 2 1/2 feet in late mudflow deposits, just below the ground surface.Image
62 Breach of highway embankment on East Bench in Salt Lake City caused extensive damage to residential neighborhood downslope.Image
63 Characteristic arcuate crack pattern in basement of house. Both vertical and lateral displacement is apparent.Image
64 The circumstances here probably make a utility trench cave-in inevitable. A perched water table is sapping fine sand from underneath a thick silt bed, leaving the latter unsupported. Failure will be too rapid for escape of a workman who may be in the trench at the wrong moment.Image
65 Closer view of head and foot of Park City landslide. Note tilt blocks at head of slide.Image
66 Closer view of slide cracks in high fill in Salt Lake City subdivision. Note housing density downslope.Image
67 Closeup of slide plane. Note deposition of white calcium carbonate by groundwater along slide plane. Arrow points to smooth, slickensided (grooved) surface on underside of sliding mass.Image
68 Closeup view of the fault shown in last slide (p1274n093).Image
69 Cloudburst flood caused erosion of the North Bench in Salt Lake City. Eroded channel begins where paved street ends.Image
70 Cone or fan of debris deposited on highway after cloudburst flood in Big Cottonwood Canyon.Image
71 Hydrograph depicting flow for the year 1945 of Utah's second largest spring, Swan Creek Spring, west of Bear Lake in northern Utah. Note the fluctuation in flow from April to September. Note also rapid response to spring snowmelt (April and May) and rainfall (June and July). The rock from which the spring issues (aquifer) is limestone. The graph illustrates the importance of controlling development on limestone terrain.Image
72 In the same house; the ceiling is clearly distressed.Image
73 Incipient landslide failure on subdivision road. Note characteristic arcuate configuration of ground surface, also patching along crack.Image
74 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
75 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
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