Filters: Tags: Igneous Rocks (X) > partyWithName: Monica Erdman (X)
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View north toward basalt dike (photograph EI10) in Hakatai Shale, Unkar Group, on north side of river mile 77.2, at beginning of Hance Rapids. Shinumo Sandstone forms cliff at upper edge of photograph.
Aerial view north towards Vulcans Throne volcano in distance on north side of river mile 179.3. View in foreground is north along Toroweap Fault in lower Prospect Canyon at faulted unnamed Pleistocene cinder cone and alluvium on east side of Prospect Canyon. Mount Trumbull (Pliocene basalt) on skyline, left side of photograph.
Aerial view north toward 900-foot-thick Cardenas Basalt of Unkar Group (black), that overlies Ochoa Point Member of Dox Formation, Unkar Group (red slope), overlain by Nankoweap Formation (purple strata), west side of Ochoa Point, 1 mile northwest of river mile 71.0.
Views northwest toward white Miocene tuff beds in the Gyp Hills, 2 miles east of Tassi Spring, north side of Tassi Wash.
Aerial view north toward 18-million-year (Ma) Peach Spring Tuff (brown) that overlies white Tertiary West Water Formation in upper Milkweed Canyon.
View of the west-facing wall inside 1,000-year-old Little Spring volcano, 2 miles south of Mount Trumbull.
Hundred and Fiftynine Mile Dike at top of Redwall Limestone (person for scale on dike), south of river mile 159.7.
View north toward basalt cascade down north wall of river, river mile 181.4.
View northwest and downriver toward basalt cascades over Esplanade Sandstone at north rim, Redwall Limestone (large gray cliff), undifferentiated Devonian and Cambrian strata below Redwall Limestone cliff to river, from river mile 184.3.
Aerial view north toward south side of Quaternary basalt neck and pyroclastic deposits of Yumtheska Vent West sample site, K-Ar age 0.780±0.15 thousand years (ka) (Wenrich and others, 1995).
Aerial view northwest toward basalt dikes (photograph EI06) on west side of Unkar Creek canyon in Solomon Temple Member of Dox Formation, Unkar Group, about 2 miles west of river mile 72.5.
Aerial view southeast toward west side of Separation hill of south Separation Canyon, Hualapai plateau; basalt flow over Tertiary Buck and Doe Conglomerate. K-Ar age is 19.03±0.44 million years (Ma) (Billingsley and others, 2006a).
View northwest toward basalt cascades over Esplanade Sandstone, Redwall Limestone (large gray cliff), Temple Butte Formation (lower left of photograph), north rim, north of river mile 184.3.
View west toward sample site of basalt neck on south side of Grand Pipe, Pakoon Limestone, Sanup Plateau, 1.7 miles northeast of river mile 273.5. K-Ar age is 17.4±0.3 million years (Ma).
Aerial view southeast toward Tuckup cinder cone and dike, west rim of Tuckup Canyon; K-Ar age 0.760±0.08 thousand years (ka) (Wenrich and others, 1995).
View west toward tan-colored basalt dike in Hakatai Shale (red strata) below Shinumo Sandstone (brown cliff), about a half mile north of river mile 90.0.
Aerial view north toward Hurricane Fault segments in lower Whitmore Canyon area. East segment of fault is covered by Pleistocene basalt flow (right half of photograph) and west segment is in the newly eroded Whitmore Canyon on left side of photograph.
View west from Toroweap campground area above river mile 178.2 toward Toroweap leap (at person), Lava Falls Rapids (lower left), and basalt lava cascades from Esplanade Sandstone.
Aerial view west toward Prospect Canyon volcano and associated dikes (photograph CI43) on west side of lower Prospect Canyon, about a half mile south of river mile 180.0 on red strata of upper Supai Group.
Closeup view of pyroclastic dike material of Hundred and Fiftynine Mile Vent, millipede for scale (photographs CI10, CI11), south of and above river mile 159.7.
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