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View northeast toward Red Butte with 9.7 million year (Ma) basalt flow (photograph EI14) on top that overlies Shinarump Member of Chinle Formation; K-Ar age is 9.730±0.91 Ma (Billingsley and others, 2006b).
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Close-up view of Buck and Doe Conglomerate at base of 19-million-year (Ma) basalt flow on northwest side of Separation hill, west side of south Separation Canyon, Hualapai plateau.
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Aerial view west toward northern Two Hundred and Twentyseven Mile intrusive in Watahomigi Formation, about 1.5 miles north of river mile 228.2. K-Ar age is 13.47±0.3 million years (Ma) (Wenrich and others, 1995).
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View northwest from Mount Logan viewpoint toward Pleistocene basalt dike on lower central ridge in lower red member (lower red slope) and Shnabkaib Member (white slopes) of Moenkopi Formation (photograph CI89), Hells Hole, upper Whitmore Canyon.
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Aerial view northwest toward Lizard Dike (basalt dike) in Comanche Point Member of Dox Formation, Unkar Group (red and white slope), north side of river mile 71.6.
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Aerial view northwest toward Tappan Spring basalt flow (photograph EI02) that flowed down Little Colorado River towards Grand Canyon. K-Ar age is 0.529±0.079 thousand years (ka) (Billingsley and others, 2007), about 4 miles west of Cameron, Arizona. Basalt overlies Shinarump Member of Chinle Formation (white and brown cliff), and upper red member of Moenkopi Formation (red slope).
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Aerial view northeast toward dikes in Esplanade Sandstone and Hermit Formation on southwest side of Whitmore hill, 1.2 miles west of river mile 189.0. K-Ar age is 4.56±0.12 million years (Ma) (Billingsley and Wellmeyer, 2003).
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This report provides detailed (1:63,360-scale) mapping of the Tanana B-1 Quadrangle (250 square miles; equivalent to four 7.5 minute quadrangles). The area is part of the Manley Hot Springs-Tofty mining districts and adjacent to the Rampart mining district to the north of the Tanana A-1 and A-2 Quadrangles. This report includes detailed bedrock, structural, stratigraphic, and geochronologic data. Based on the resulting geologic maps, field investigations, and laboratory materials analyses, the project has also generated derivative maps of geologic construction materials and geologic hazards.
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This geologic map and report depicts portions of the Livengood B-3, B-4, C-3, and C-4 quadrangles. The Livengood area is a historically productive placer mining area approximately 80 road miles north of Fairbanks, Alaska. This report synthesizes recently collected and previously published agency and industry geologic data in a 1:50,000-scale comprehensive geologic map to build a better understanding of the geology and mineral-resource potential of the Livengood area. It expands and updates the Alaska Division of Geological & Geophysical Surveys (DGGS) Preliminary Interpretive Report (PIR) 2004-3 with the addition of new DGGS mapping and drillhole data from ITH, and integrates previously published DGGS surficial...
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Aerial view southeast toward Quaternary basalt neck and pyroclastic deposits of Yumtheska Vent West, on Esplanade Sandstone, west side of Yumtheska Point.
map background search result map search result map Interpretive geologic bedrock map of the Tanana B-1 Quadrangle, Central Alaska Geologic map of portions of the Livengood B-3, B-4, C-3, and C-4 quadrangles, Tolovana mining district, Alaska CI05. Aerial view southeast toward Quaternary basalt neck and pyroclastic deposits of Yumtheska Vent West CI27. View north down Tuckup Trail toward east side of Tuckup cinder cone and dike CI30. View west and downriver toward Vulcans Anvil Dike CI32. Basalt sill in Tapeats Sandstone CI47. View northeast toward Pleistocene basalt flows on east side of lower Prospect Canyon CI66. View north and up basalt cascade down north side of canyon CI76. View north into new Whitmore Canyon along Hurricane Fault filled with Pleistocene basalt flows CI79. Aerial view northeast toward Pleistocene basalt dike in Wescogame Formation of Supai Group CI88. View northwest from Mount Logan viewpoint toward Pleistocene basalt dike in Hells Hole EI01. Aerial view northwest toward Tappan Spring basalt flow that flowed down Little Colorado River towards Grand Canyon EI04. Aerial view northwest toward Lizard Dike in Comanche Point Member of Dox Formation EI13. View northeast toward Red Butte with 9.7 million year basalt flow EI14. Basalt flow overlying Shinarump Member of Chinle Formation at south end of Red Butte WI03. Aerial view northeast toward dikes in Esplanade Sandstone and Hermit Formation on Whitmore hill WI16. Aerial view west toward Price Point basalt flows over Tertiary rim gravel WI22. Aerial view west toward northern Two Hundred and Twentyseven Mile intrusive in Watahomigi Formation WI26. Close-up view of Buck and Doe Conglomerate at base of 19-million-year basalt flow WI28. Aerial view north toward 19-million-year basalt flows that overlie Buck and Doe Conglomerate Interpretive geologic bedrock map of the Tanana B-1 Quadrangle, Central Alaska Geologic map of portions of the Livengood B-3, B-4, C-3, and C-4 quadrangles, Tolovana mining district, Alaska