U.S. Geological Survey news

An image of the current map of the month, a French map of the Colorado river from 1844.

Map of the Month: June 2021

Our June Map of the Month is this 1844 Plan de l'embouchure du Rio Colorado dans la Mer Vermeille (English title: Plan from the Mouth of Rio Colorado in the Ruddy Sea). It is a French survey of the mouth of the Colorado River that displays information on the river’s depth, islands, and other navigat...

Map of the United States in 1893 featuring geologic categorization of multiple rock types denoted by color and texture

Map of the Month: May 2021

Our May Map of the Month is this Reconnoissance Map of the United States by William John McGee from 1893. It displays the geologic variation throughout the regions of the United States as documented at the time by the U.S. Geological Survey and various state Geological Surveys. ...