OF-16-02 Geologic Map of the Watkins Quadrangle Geology, Publications June 27, 2017 OF-16-02 Geologic Map of the Watkins Quadrangle, Arapahoe and Adams Counties, Colorado We’ve just uploaded the next of our free STATEMAP quadrangle map products to our online store: the Geologic Map of the Watkins Quadrangle, Arapahoe and Adams Counties, Colorado. The STATEMAP series in…