Mapping at 1:250,000 scale was produced by combining and simplifying completed 1:100,000-scale geologic mapping to produce four maps, one for each quadrant of Washington. With the 2002 release of the full-color printed geologic map of the state’s northwest quadrant, all four quadrant maps are now available from the Geology and Earth Resources Division.
Printed copies of these maps can be ordered from the Washington State Department of Printing. See page 3 of our Publications List for details.