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Geology

Geologic mapping and identification of potential geologic hazards by GMEGSC staff helps all to understand our surrounding environment.

Filter Total Items: 16

Response of plant, microbial, and soil functions to drought and fire in California

California is experiencing changes in precipitation and wildfire regimes. Longer, hotter fire seasons along with extremes in precipitation are expected to continue. Not only do these disturbances affect the productivity and resilience of ecosystems, they also directly impact human health and wellbeing. Soils hold an immense amount of our terrestrial carbon pool, and the microorganisms and minerals...
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Response of plant, microbial, and soil functions to drought and fire in California

California is experiencing changes in precipitation and wildfire regimes. Longer, hotter fire seasons along with extremes in precipitation are expected to continue. Not only do these disturbances affect the productivity and resilience of ecosystems, they also directly impact human health and wellbeing. Soils hold an immense amount of our terrestrial carbon pool, and the microorganisms and minerals...
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San Andreas Fault System in Southern California

Southern California is home to nearly 24 million people and countless visitors who live, recreate, consume resources, and face the risk of natural hazards in the region. This project produces high-quality, multi-purpose geologic maps, databases, and reports that portray our understanding of the region’s four-dimensional geologic framework. We conduct stratigraphic, structural, geomorphological...
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San Andreas Fault System in Southern California

Southern California is home to nearly 24 million people and countless visitors who live, recreate, consume resources, and face the risk of natural hazards in the region. This project produces high-quality, multi-purpose geologic maps, databases, and reports that portray our understanding of the region’s four-dimensional geologic framework. We conduct stratigraphic, structural, geomorphological...
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Enterprise GIS for the NCGMP Community

We are focused on modernizing digital infrastructure by implementing a web-services based, enterprise GIS architecture focused on enabling scientific collaboration across geographically dispersed FEDMAP scientists. This project supports geologic mapping goals set forth by the National Geologic Mapping Act of 1992 and the vision of the National Cooperative Geologic Mapping Program (NCGMP). Prior to...
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Enterprise GIS for the NCGMP Community

We are focused on modernizing digital infrastructure by implementing a web-services based, enterprise GIS architecture focused on enabling scientific collaboration across geographically dispersed FEDMAP scientists. This project supports geologic mapping goals set forth by the National Geologic Mapping Act of 1992 and the vision of the National Cooperative Geologic Mapping Program (NCGMP). Prior to...
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Geologic Mapping of the Lower Colorado River System

This is a comprehensive scientific investigation of the geologic history and framework of the lower Colorado River. We are using geologic mapping in combination with stratigraphic, geochronologic, and geophysical studies to develop a holistic understanding of the river’s origin, the structural history of the landscape through which it flows, and the stratigraphic and geomorphic consequences of the...
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Geologic Mapping of the Lower Colorado River System

This is a comprehensive scientific investigation of the geologic history and framework of the lower Colorado River. We are using geologic mapping in combination with stratigraphic, geochronologic, and geophysical studies to develop a holistic understanding of the river’s origin, the structural history of the landscape through which it flows, and the stratigraphic and geomorphic consequences of the...
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Pacific Northwest Geologic Mapping: Northern Pacific Border, Cascades and Columbia

The Pacific Northwest is an area created by active and complex geological processes. On its path to the Pacific Ocean, the Columbia River slices through a chain of active volcanoes located along the western margin of the U.S. in Washington, Oregon, and northern California. These volcanoes rest above the active Cascadia subduction zone, which is the boundary where the oceanic tectonic plate dives...
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Pacific Northwest Geologic Mapping: Northern Pacific Border, Cascades and Columbia

The Pacific Northwest is an area created by active and complex geological processes. On its path to the Pacific Ocean, the Columbia River slices through a chain of active volcanoes located along the western margin of the U.S. in Washington, Oregon, and northern California. These volcanoes rest above the active Cascadia subduction zone, which is the boundary where the oceanic tectonic plate dives...
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Arctic Biogeochemical Response to Permafrost Thaw (ABRUPT)

Warming and thawing of permafrost soils in the Arctic is expected to become widespread over the coming decades. Permafrost thaw changes ecosystem structure and function, affects resource availability for wildlife and society, and decreases ground stability which affects human infrastructure. Since permafrost soils contain about half of the global soil carbon (C) pool, the magnitude of C losses...
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Arctic Biogeochemical Response to Permafrost Thaw (ABRUPT)

Warming and thawing of permafrost soils in the Arctic is expected to become widespread over the coming decades. Permafrost thaw changes ecosystem structure and function, affects resource availability for wildlife and society, and decreases ground stability which affects human infrastructure. Since permafrost soils contain about half of the global soil carbon (C) pool, the magnitude of C losses...
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San Francisco Bay Area - Santa Cruz Mountains, CA (BALT-CZU)

Landslides in the San Francisco Bay Area of California impact people, infrastructure, and the environmnent, and are commonly induced by intense or prolonged rainfall associated with strong winter storms.
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San Francisco Bay Area - Santa Cruz Mountains, CA (BALT-CZU)

Landslides in the San Francisco Bay Area of California impact people, infrastructure, and the environmnent, and are commonly induced by intense or prolonged rainfall associated with strong winter storms.
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San Francisco Bay Area – SF Peninsula (BALT4) Site near Pacifica, CA

Landslides in the San Francisco Bay area (SFBA) of California impact people, infrastructure, and the environment, and are commonly induced by intense or prolonged rainfall associated with strong winter storms.
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San Francisco Bay Area – SF Peninsula (BALT4) Site near Pacifica, CA

Landslides in the San Francisco Bay area (SFBA) of California impact people, infrastructure, and the environment, and are commonly induced by intense or prolonged rainfall associated with strong winter storms.
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San Francisco Bay Area – SF Peninsula (BALT3) Site near Brisbane, CA

Landslides in the San Francisco Bay area (SFBA) of California impact people, infrastructure, and the environment, and are commonly induced by intense or prolonged rainfall associated with strong winter storms.
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San Francisco Bay Area – SF Peninsula (BALT3) Site near Brisbane, CA

Landslides in the San Francisco Bay area (SFBA) of California impact people, infrastructure, and the environment, and are commonly induced by intense or prolonged rainfall associated with strong winter storms.
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San Francisco Bay Area – Marin County (BALT2) Site near San Rafael, CA

Landslides in the San Francisco Bay area (SFBA) of California impact people, infrastructure, and the environment, and are commonly induced by intense or prolonged rainfall associated with strong winter storms.
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San Francisco Bay Area – Marin County (BALT2) Site near San Rafael, CA

Landslides in the San Francisco Bay area (SFBA) of California impact people, infrastructure, and the environment, and are commonly induced by intense or prolonged rainfall associated with strong winter storms.
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Drivers and Impacts of North Pacific Climate Variability

Climate model forecasts indicate an increase in extreme hydrologic events, including floods and droughts, for California and the western U.S. in the future. To better understand what the consequences of this future change in climate may be, USGS scientists are studying the frequency, magnitude, and impacts of past hydroclimate variability and extremes in the region. This project produces well...
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Drivers and Impacts of North Pacific Climate Variability

Climate model forecasts indicate an increase in extreme hydrologic events, including floods and droughts, for California and the western U.S. in the future. To better understand what the consequences of this future change in climate may be, USGS scientists are studying the frequency, magnitude, and impacts of past hydroclimate variability and extremes in the region. This project produces well...
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GeoMapping for Integrated Science

This project uses geologic and geomorphic mapping in the context of societally relevant problems in the Earth’s critical zone. Leveraging interdisciplinary research ties and interagency collaborations, it utilizes remote sensing data, corroborated with field observations, to determine i) the spatial distribution of geomorphic processes and ages of Quaternary deposits in the context of active...
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GeoMapping for Integrated Science

This project uses geologic and geomorphic mapping in the context of societally relevant problems in the Earth’s critical zone. Leveraging interdisciplinary research ties and interagency collaborations, it utilizes remote sensing data, corroborated with field observations, to determine i) the spatial distribution of geomorphic processes and ages of Quaternary deposits in the context of active...
Learn More