RockTalk: Mapping Colorado


This edition of RockTalk provides insight into the life of a geologist. Digital PDF download. RT-07-04D

From the Introduction:

Hasn’t Colorado Already Been Mapped?

This is a common response when Colorado Geological Survey (CGS) personnel tell someone that we have a geologic mapping program. The answer is yes. And, no. Yes, the state is completely mapped topographically at a detailed scale of 1:24,000. Yes, there is a geologic map of Colorado. No, the state has not been mapped geologically at a detailed scale. Colorado has nearly 1800 quadrangles, each covering 7.5 minutes of latitude and longitude, or about 56 square miles. However, only a fifth of the state’s quadrangles are mapped in detail.