Ryan Crow of the U.S. Geological Survey (USGS) gave a talk to a packed crowd at the Museum of Northern Arizona Jan. 12 ...

There's plenty to look at as you navigate in Aloft, with symbols across the map table to help you find the most important ...

On January 12, Crow will give a talk at the Museum of Northern Arizona in conjunction with The Grand Canyon Dragon Map exhibit. The talk will be centered on the history of geologic mapping in and ...

Geological maps indicate the distribution of strata and rocks under the ground, and have been created as basic maps for resource development and national land use. In recent years, such maps have also ...