Found 5 datasets matching "Portland Quadrangle".
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This dataset contains polygons representing deposits of hyaloclastic debris that were generated between about 3.5 and 3.0 million years ago when a series of basaltic lava flows entered the canyon...
Search relevance: 46.51 | Views last month: 1 -
The Digital Geologic-GIS Map of Fort Vancouver National Historic Site and Vicinity, Washington is composed of GIS data layers and GIS tables, and is available in the following GRI-supported GIS...
Search relevance: 30.02 | Views last month: 0 -
The Digital Surficial Geologic-GIS Map of Delaware Water Gap National Recreation Area and Vicinity, New Jersey, Pennsylvania and New York is composed of GIS data layers and GIS tables, and is...
Search relevance: 28.59 | Views last month: 2 -
The Digital Bedrock Geologic-GIS Map of Marsh-Billings-Rockefeller National Historical Park and the Town Boundary of Woodstock, Vermont is composed of GIS data layers and GIS tables, and is...
Search relevance: 27.69 | Views last month: 0 -
The Digital Surficial Geologic-GIS Map of Marsh-Billings-Rockefeller National Historical Park and the Town Boundary of Woodstock, Vermont is composed of GIS data layers and GIS tables, and is...
Search relevance: 25.85 | Views last month: 0
