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Index card (No. 100ct-112ct): Mount St. Helens in eruption on August 7, 1980. Skamania County, Washington. August 7, 1980. Photo 101ct published as Figure 293-A and photo 107ct published as Figure 293-B in U.S. Geological Survey. Professional Paper 1250. 1981.
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Slide description and index card: Young tephra sequence 8 km southeast of the former summit. Pale dacite tephras (sets Y and P) are overlain by tephras of Castle Creek and younger periods that include dark andesite tephras of layers Bh and Bo, pale dacite pumice of layer Bi that is about 1,000 yr old, dark basalt tephras of layer Bu, and white dacite pumice of set W. Skamania County, Washington. n.d. (Photo by R.P. Hoblitt). Published as Figure 5 in U.S. Geological Survey. Professional Paper 1250. 1981.
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Slide description: View of massive debris-avalanche deposit. Geologist Don Swanson (face not visible) in foreground in red jacket for scale. Cowlitz County, Washington. May 22, 1980. (Photo by P.W. Lipman). No index card available. Portion published on p. 345 in U.S. Geological Survey. Professional Paper 1250. 1981.
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Slide description and index card: Vertical thermal images of Mount St. Helens. RS-14A scanner; 8-14µm region; 4,572 m flight altitude.U.S. Geological Survey calibrated color-coded images processed by computer; 3 mrad (milliradian) spatial resolution. Vertical stripe on side of image (on published photo only) indicates color-coded temperature of upper blackbody of RS-14A scanner. B. August 13, 0530 PDT, showing crater, dome, amphitheater, and pyroclastic-flow deposits. Skamania County, Washington. August 13, 1980. Published as Figure 173-B in U.S. Geological Survey. Professional Paper 1250. 1981.
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Slide description and index card: Vertical thermal images of Mount St. Helens. RS-14A scanner; 8-14µm region; 4,572 m flight altitude.U.S. Geological Survey calibrated color-coded images processed by computer; 3 mrad (milliradian) spatial resolution. Vertical stripe on side of image (on published photo only) indicates color-coded temperature of upper blackbody of RS-14A scanner. C. August 13, 1941-1943 PDT, showing crater, amphitheater, and pyroclastic-flow deposits. Skamania County, Washington. August 13, 1980. Published as Figure 173-C in U.S. Geological Survey. Professional Paper 1250. 1981.
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Slide description and index card: Near view of stratigraphic section atop distal downed tree. Layers A2 and A3 overlie bark. Rule for scale. Skamania County, Washington. 1980. (Graphics on published photo only). (Photo by R.B. Waitt, Jr.). Published as Figure 267 in U.S. Geological Survey. Professional Paper 1250. 1981.
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Slide description and index card: Valley-fill deposit in upper Smith Creek canyon, formed by a blast pyroclastic flow. Note abundant delimbed and debarked logs and wood fragments concentrated near the surface of the deposit. Skamania County, Washington. 1980. (Photo by C.D. Miller). Published as Figure 238 in U.S. Geological Survey. Professional Paper 1250. 1981.
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Slide description and index card: Aerial view of tongues of pyroclastic-flow deposits of July 22, 1980. View of southeast side of pumice plain looking south-southeast. Pyroclastic flows moved from right to left; distance from upper right to lower left is about 1.5 km. Skamania County, Washington. August 5, 1980. (Photo by P.D. Rowley). Published as Figure 292 in U.S. Geological Survey. Professional Paper 1250. 1981.
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Index card: Mount St. Helens eruption of August 7, 1980. (Geologists in foreground for scale against ash cloud). Skamania County, Washington. Figure caption: Development of pyroclastic flow during 1623 PDT (Pacific Daylight time) eruption on August 7, viewed from Coldwater Ridge, about 8 km north of Mount St. Helens. After motion of pyroclastic flow has ceased, at about 1631 PDT, associated ash cloud billows toward viewpoint, and impending fallout from it and the Plinian column necessitated departure of observers. Two geologists preparing for departure in foreground. Skamania County, Washington. August 7, 1980. Published as Figure 293-D, U.S. Geological Survey Professional paper 1250.
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Slide description: Aerial view of logging equipment, vehicles, buildings at Camp Baker damaged by mudflows. Cowlitz County, Washington. May 19, 1980. (Photo by P.W. Lipman). No index card available. Portion published on p. 460 in U.S. Geological Survey. Professional Paper 1250. 1981.
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Slide description: Aerial view of house and mudflow. A wing of this house has been broken off by the Toutle River mudflow and pushed into a side yard. Marks of earlier, higher mud level visible on trees and house. People salvaging belongings for scale. Cowlitz County, Washington. 1980. (Photo by D.R. Crandell). No index card available. Portion published on p. 787 in U.S. Geological Survey. Professional Paper 1250. 1981.
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Slide description and index card: Scorched needles beneath layer A3 plastered on tree. Needles beneath layer A3 are just as scorched as those not covered. Skamania County, Washington. 1980. (Photo by R.B. Waitt, Jr.). Published as Figure 268 in U.S. Geological Survey. Professional Paper 1250. 1981.
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Slide description and index card: Radial fracture in the tephra blanket in the crater. The rock in and adjacent to the fracture is light-pink oxidized dacite; the yellow encrustations form an outer zone beyond the oxidized dacite. Temperature measured at a depth of 1 m in the fracture was 200° C. A. South-southwest view of fracture toward center of crater. Ice axe at right is about 1 m long. Skamania County, Washington. September 16, 1980. Published as Figure 133-A in U.S. Geological Survey. Professional Paper 1250. 1981.
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Slide description and index card: Orange-yellow encrustations deposited from fumarole 6 in the Mount St. Helens debris flow. A. Appearance on July 1, 1980 was conspicuously zoned; temperature was 94° C. Yellow area was about 3 m across. Skamania County, Washington. July 1, 1980. Portion published as Figure 141-A in U.S. Geological Survey. Professional Paper 1250. 1981.
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Index card: Geologists at theodolite station at Timberline Viewpoint. Mount St. Helens in the background, with bulge especially prominent. Skamania County, Washington. May 1/2, 1980. Published as Figure 83 in U.S. Geological Survey. Professional Paper 1250. 1981.
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Slide description: Geologist David A. Johnston with monitoring device; car in background. Skamania County, Washington. 1980. No index card available. Portion published on p. VII in U.S. Geological Survey. Professional Paper 1250. 1981.
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Slide description: Geologist wearing mask at work by crack in volcanic deposit. Box of equipment at left. Skamania County, Washington. September 24, 1980. (Photo by R.P. Hoblitt). No index card available. Portion published on p. 191 in U.S. Geological Survey. Professional Paper 1250. 1981.
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Slide description and index card: Aerial view of dacite dome from near ground level. Fracture in surface of dome is visible at upper right. Dome height is 65 m and east-west diameter is about 325 m, part of which is obscured by circumferential fumarole emanations. Skamania County, Washington. June 29, 1980. (Photo by Jules D. Friedman). (Same as black and white photo msh_1250_00265). Same as black and white photo published as Figure 309 in U.S. Geological Survey. Professional Paper 1250. 1981.


map background search result map search result map Young tephra sequence 8 km southeast of the former Mount St. Helens summit. Skamania County, Washington. n.d. Radial fracture in the tephra blanket in the Mount St. Helens crater. Skamania County, Washington. 1980. Orange-yellow encrustations deposited from fumarole 6 in the Mount St. Helens debris flow. Skamania County, Washington. 1980. Vertical thermal image of Mount St. Helens. Skamania County, Washington. 1980. Vertical thermal image of Mount St. Helens. Skamania County, Washington. 1980. Valley-fill deposit in upper Smith Creek canyon, formed by a blast pyroclastic flow from Mount St. Helens. Skamania County, Washington. 1980. Stratigraphic section atop distal downed tree. Mount St. Helens, Skamania County, Washington. 1980. Scorched needles beneath layer A3 plastered on tree. Mount St. Helens, Skamania County, Washington. 1980. Aerial view of tongues of pyroclastic-flow deposits of July 22 eruption of Mount St. Helens. Skamania County, Washington. 1980. Aerial view of Mount St. Helens dacite dome from near ground level. Skamania County, Washington. 1980. Geologists setting up reflectors on Sugar Bowl, northeast of Mount St. Helens. Skamania County, Washington. April 23, 1980. Geologist using geodimeter to measure deformation of Mount St. Helens from Smith Creek Butte. Skamania County, Washington. 1980. Geologists at theodolite station at Timberline Viewpoint. Mount St. Helens, Skamania County, Washington. 1980. Time lapse of August 7, 1980, eruption of Mount St. Helens. Skamania County, Washington. 1980. Time lapse of August 7, 1980, eruption of Mount St. Helens. Skamania County, Washington. 1980. Geologist David A. Johnston with monitoring device. Mount St. Helens, Skamania County, Washington. 1980. Geologist wearing mask at work by crack in volcanic deposit. Mount St. Helens, Skamania County, Washington. 1980. View of massive debris-avalanche deposit. Mount St. Helens, Cowlitz County, Washington. 1980. Aerial view of logging equipment, vehicles, buildings at Camp Baker damaged by mudflows. Mount St. Helens, Cowlitz County, Washington. 1980. Aerial view of house and mudflow. Mount St. Helens, Cowlitz County, Washington. 1980. View of massive debris-avalanche deposit. Mount St. Helens, Cowlitz County, Washington. 1980. Aerial view of logging equipment, vehicles, buildings at Camp Baker damaged by mudflows. Mount St. Helens, Cowlitz County, Washington. 1980. Aerial view of house and mudflow. Mount St. Helens, Cowlitz County, Washington. 1980. Young tephra sequence 8 km southeast of the former Mount St. Helens summit. Skamania County, Washington. n.d. Radial fracture in the tephra blanket in the Mount St. Helens crater. Skamania County, Washington. 1980. Orange-yellow encrustations deposited from fumarole 6 in the Mount St. Helens debris flow. Skamania County, Washington. 1980. Vertical thermal image of Mount St. Helens. Skamania County, Washington. 1980. Vertical thermal image of Mount St. Helens. Skamania County, Washington. 1980. Valley-fill deposit in upper Smith Creek canyon, formed by a blast pyroclastic flow from Mount St. Helens. Skamania County, Washington. 1980. Stratigraphic section atop distal downed tree. Mount St. Helens, Skamania County, Washington. 1980. Scorched needles beneath layer A3 plastered on tree. Mount St. Helens, Skamania County, Washington. 1980. Aerial view of tongues of pyroclastic-flow deposits of July 22 eruption of Mount St. Helens. Skamania County, Washington. 1980. Aerial view of Mount St. Helens dacite dome from near ground level. Skamania County, Washington. 1980. Geologists setting up reflectors on Sugar Bowl, northeast of Mount St. Helens. Skamania County, Washington. April 23, 1980. Geologist using geodimeter to measure deformation of Mount St. Helens from Smith Creek Butte. Skamania County, Washington. 1980. Geologists at theodolite station at Timberline Viewpoint. Mount St. Helens, Skamania County, Washington. 1980. Time lapse of August 7, 1980, eruption of Mount St. Helens. Skamania County, Washington. 1980. Time lapse of August 7, 1980, eruption of Mount St. Helens. Skamania County, Washington. 1980. Geologist David A. Johnston with monitoring device. Mount St. Helens, Skamania County, Washington. 1980. Geologist wearing mask at work by crack in volcanic deposit. Mount St. Helens, Skamania County, Washington. 1980.