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Coastal and Marine Geology Program > Online Science Resource Locator > Sonar Mapping - Pacific Northwest

Sonar Mapping - Pacific Northwest

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Sonar Mapping:
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Sonar mapping of the sea floor provides CMG researchers with very useful data. Some sonar systems map the topography of the sea floor by recording large swaths of depth measurements. Others collect information useful in determining the geologic makeup of the sea floor and the sub-surface structure.

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Items below are listed from most recently updated to least recently updated.

These are results 1 through 14 of 14 matches.

Publication
The Escanaba Trough of Gorda Ridge: A Laboratory for Mineral-forming Processes - USGS Fact Sheet
Description: The Gorda Ridge is a unique geological system in the Exclusive Economic Zone of the United States. This tectonically and volcanically active plate boundary has an unusual morphology for spreading centers in the Pacific Ocean: a deep, wide axial valley flanked by high ridges. Because of its location near the continental margin, part of the axial valley known as the Escanaba Trough is covered by sediment. The Escanaba Trough provides opportunities for scientists to learn details about tectonics, volcanism, mineral formation, and biological activity that are not normally observed at mid-ocean ridges. It is a geological laboratory of grand proportions.
updated: 2004-03-02 pages include:

Research Project
Pacific Sea-Floor Mapping
Description: Images of the sea floor off the coasts of California, Hawaii, Gulf of Mexico, and Lake Tahoe. Backscatter and swath bathymetry, regular and in 3-D!
updated: 2003-10-29 pages include:

Publication
USGS I Map 2790 - Crater Lake Revealed
Description: Recently, the bottom of Crater Lake, Oregon was mapped with a high-resolution multibeam echo sounder. The new bathymetric survey provides a 2m/pixel view of the lake floor from its deepest basins virtually to the shoreline. Using Geographic Information Systems (GIS) applications, the bathymetry data can be visualized and analyzed to shed light on the geology, geomorphology, and geologic history of Crater Lake.
updated: 2003-10-01 pages include:

Publication
Exposing the Sea Floor: High-Resolution Multibeam Mapping Along the U.S. Pacific Coast, USGS Fact Sheet 013-00
Description: PDF file
updated: 2003-03-18 pages include:

Publication
Holocene Evolution of the Southern Washington and Northern Oregon Shelf and Coast: Geologic Discussion and GIS Data Release, Open File Report 01-076
Description: Holocene Evolution of the Southern Washington and Northern Oregon Shelf and Coast: Geologic Discussion and GIS Data Release
updated: 2002-06-14 pages include:

Publication
Sidescan-sonar Imagery, Surface Sediment Samples, and Surficial Geologic Interpretation of the Southwestern Washington Inner Continental Shelf Based on Data Collected During Corliss Cruises 97007 and 98014
Description: The sidescan-sonar imagery and surface sediment samples have been used to map the surficial geology of this storm-dominated inner-shelf environment. Includes data in GIS files.
updated: 2002-04-24 pages include:

Research Project
1998 Earthquake Hazards Investigation in Puget Sound, Washington
Description: Seismic hazards investigation in Puget Sound to provide public information for mitigating a potential earthquake disaster in the Pacific Northwest.
updated: 2001-03-08 pages include:

Data Set
Global Inventory of Natural Gas Hydrate Occurance
Description: This updated global inventory reports on natural gas hydrate recovered from 20 places worldwide and includes 79 places where the presence of gas hydrate has been inferred from geophysical, geochemical, or geological evidence.
updated: 2001-01-09 pages include:

General Information
Education and Outreach Information
Description: Helpful information about Activities at the USGS Western Region Coastal and Marine Geology Team.
updated: 2000-11-20 pages include:

Educational Materials
GLORIA Imagery of the Exclusive Economic Zone of the USA
Description: USGS research using GLORIA sidescan sonar to map the sea floor within the 200-mile wide Exclusive Economic Zone.
updated: 2000-07-12 pages include:

General Information
El Niño Home Page
Description: El Niño information with links to a broad range of topics such as Floods, Landslides, Coastal Hazards, Climate, News Releases.
updated: 2000-01-31 pages include:

Educational Materials
Tsunamis & Earthquakes at the USGS
Description: General information on how earthquakes generate tsunamis and summaries of tsunami research using animations and VRML models.
updated: 1999-06-28 pages include:

Data Set
CA, OR & WA GLORIA Imagery
Description: GLORIA sidescan sonar imagery of the Exclusive Economic Zone of the West Coast of the USA - Washington, Oregon and California.
updated: 1998-07-02 pages include:

Research Project
Gorda Ridge Hydrothermal System
Description: Investigation of distribution, quantity, and composition of hydrothermal deposits along the Gorda Ridge, off the coast of Oregon.
updated: 1998-06-10 pages include:

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Coastal and Marine Geology Program > Online Science Resource Locator > Sonar Mapping - Pacific Northwest