The USGS publishes a geological map that reveals the underground layers of the U.S. and supports environmental education and ...

Beginning in the 1940s, the U.S. Geological Survey’s National Mapping Program was tasked with the immense cartographical feat of surveying the entire country to create a series of more than 50,000 ...

Now you've got one less excuse not to venture into the wilderness. National Geographic just launched a website that lets you find and print a PDF of any U.S. Geological Survey (USGS) quad map across ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Want to trace the footsteps of dinosaurs or pinpoint the exact location of extinct volcanoes? A ...