Maps Showing Inundation Depths, Ice-Rafted Erratics, and Sedimentary Facies of Late Pleistocene Missoula Flood in the Willamette Valley, Oregon

Metadata Updated: November 12, 2020

This digital dataset, compiled from previously published and unpublished data sources, contains a personal geodatabase and raster data of features related to the repeated inundation of the Willamette Valley and Portland basin by Missoula Flood waters in Late Pleistocene time. The feature classes contained within the Will_Valley geodatabase are called 'erratics', representing the locations of ice-rafted erratics; 'contours', representing inundation levels associated with stratigraphic evidence of repeated floodings; and 'geology', representing the general distribution of Missoula Flood deposits. A stand-alone table within the geodatabase contains geologic unit descriptions for the geology polygons contained in the 'geology' feature class. Seven ESRI format raster grids are also included in this dataset that illustrate the physiography of the Willamette Valley as well as four important inundation levels. The scale of the source maps limits the spatial resolution (scale) of the database to 1:250,000 or smaller.

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Date February 5, 2016
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) January 1, 2003 (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from DOI Open Data

Additional Metadata

Resource Type Dataset
Metadata Date February 5, 2016
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) January 1, 2003 (publication)
Responsible Party Pacific Northwest Urban Corridor Mapping Project, U.S. Geological Survey (Point of Contact)
Contact Email
Access Constraints Use Constraints: Uses of this digital geologic map should not violate the spatial resolution of the data. Although the digital form of the data removes the constraint imposed by the scale of a paper map, the detail and accuracy inherent in map scale are also present in the digital data. The fact that this database was edited for a scale of 1:250,000 means that higher resolution information is not present in the dataset. Plotting at scales larger than 1:250,000 will not yield greater real detail, although it may reveal fine-scale irregularities below the intended resolution of the database. Similarly, where this database is used in combination with other data of higher resolution, the resolution of the combined output will be limited by the lower resolution of these data., Access Constraints: none
Bbox East Long -122.37
Bbox North Lat 45.75
Bbox South Lat 44.00
Bbox West Long -123.5
Coupled Resource
Frequency Of Update notPlanned
Licence This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

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