Radiometric Age Information Layer for Oregon, Release 1. This map depicts the Radiometric Age Information Layer for Oregon, release 1 (RAILO-1) and shows locations and geologic ages of igneous and metamorphic rock samples. RAILO-1 is a compilation of 2,325 radiometric ages from published and unpublished reports by the Oregon Department of Geology and Mineral Industries’ (DOGAMI), along with additional data compiled from other sources such as the U.S. Geological Survey (USGS) and the journal Isochron/West. The compiled ages range from 0.00005 million years to 291 million years.
RAILO-1 is provided in Microsoft® Excel® spreadsheet and Geographic Information System (GIS) geospatial database formats. The location of each data point shown in this map was not necessarily verified; refer to the original data source for additional information about location and location uncertainty. Duplicate points were removed when found. This map also includes a list of data sources (references) from which the age information was gathered.
These data are provided “as is” without warranty of any kind, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. The user assumes all responsibility for the accuracy and suitability of these data for a specific application. In no event will DOGAMI be liable for any damages, including lots profits, lost savings, or other incidental or consequential damages arising from the use or inability to use the data.
compiled by Tracy R. Ricker and Clark A. Niewendorp
The publication CD contains:
1. "map" folder: Contains 1:1,000,000-scale (44- by 27-inch plate) mapview of RAILO-1 data in PDF format in both onscreen and high-resolution versions.
2. "shp" folder: Contains files in shape file format - native file format of ArcMAP GIS software by Esri, Redlands, California.
3. "spreadsheet" folder: Contains table in Microsoft Excel format. Please read the metadata for description of Field Names.