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Geologic map of the Buckner 7.5-Minute quadrangle, Louisa County, Virginia

The Buckner 7.5-minute quadrangle straddles three terrane boundaries in the Piedmont Physiographic Province in central Virginia: the Chopawamsic terrane, the Elk Hill Complex, and the Goochland terrane. In much of the map area, the Elk Hill Complex separates the Chopawamsic and Goochland terranes. Rocks of the Chopawamsic terrane include Ordovician metavolcanic and metasedimentary rocks...

February 7, 2025—Kīlauea summit eruption reference map

This reference map depicts the Kīlauea summit eruption within Halema‘uma‘u crater that began on December 23, 2024.

February 4, 2025 — Thermal maps of recent activity at Kīlauea summit

These thermal maps show the changing activity this week at Kīlauea summit.

Geologic map of MTM −15032 and −20032 quadrangles, western Ladon basin, Mars

Our mapping efforts focused on the geomorphic terrains and geologic units contained within Mars Transverse Mercator (MTM) −15032 and −20032 quadrangles. These two quadrangles are located along the west side of Ladon basin and span lat −12.5° N. to −22.5° N. and long 325° E. to 330° E. The western part of Ladon basin and its bounding basin ring structures to the west preserved features...

January 15, 2025—Kīlauea summit eruption reference map

This reference map depicts the ongoing Kīlauea summit eruption within Halema‘uma‘u crater as of January 15, 2025.

Surficial geology and Quaternary tectonics of the Madison Valley and fault zone, Madison, Gallatin, and Beaverhead Counties, southwest Montana

The north-northwest-striking Madison fault is approximately 95 kilometers in length, lying at the confluence of the northeastern Basin and Range province and the Yellowstone tectonic parabola. The fault zone consists primarily of west-dipping normal faults that have east-dipping antithetic faults, which create the Madison Valley graben and several northeast-trending intrabasin faults...

Map of topographic lineaments interpreted as recent surface ruptures along the Bennett Valley and Southern Maacama Fault Zones, Sonoma County, California

This study documents lidar-illuminated topographic lineaments interpreted as evidence of recent surface fault ruptures and surface ruptures related to distributed deformation along the Bennett Valley Fault Zone and the southernmost Maacama Fault Zone in the northern San Francisco Bay area (fig. 1, on map sheet). Together, these fault zones form a structural connection across a right...

January 2, 2025—Kīlauea summit eruption reference map

This reference map depicts the Kīlauea summit eruption within Halema‘uma‘u as of January 2, 2025.

December 30, 2024 — Kīlauea summit thermal map compilation

This compilation shows thermal maps of Kīlauea summit eruption for December 23-30, 2024.

December 30, 2024 — Thermal map of eruption at Kīlauea summit

This thermal map shows eruptive activity on December 30, 2024, within Halemaʻumaʻu crater at the summit of Kīlauea. Lava fountaining and flows were active in the southwest portion of the caldera. Cooler colors (purple, black) show lower temperatures while hotter colors (orange, yellow) show higher temperatures.

Geologic map of Scoggins Dam, Henry Hagg Lake, and Scoggins Valley, Washington County, Oregon

New geologic mapping (Wells and others, 2020b) and geophysical mapping (Blakely and others, 2000; McPhee and others, 2014; Wells and others, 2020a) document kilometers of Cenozoic right-lateral offset along the Gales Creek Fault Zone, a major, northwest-striking fault zone forming the boundary between the Tualatin Valley and the Coast Range. The Bureau of Reclamation’s (Reclamation)...

December 29, 2024—InSAR image of Kīlauea deformation associated with ongoing eruption

This map shows recent deformation at Kīlauea over the timeframe of December 17–29, 2024, during which an eruption began within Halemaʻumaʻu crater at the volcano's summit.
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