USGS has unveiled its most detailed national geologic map, giving the public a free, interactive way to explore underground ...

The U.S. Geological Survey plans to start low-level plane flights this month across eastern Iowa to update national maps and ...

In the summer, the U.S. Geological Survey began large-scale low-level airplane flights over the Upper Peninsula and northern ...

Helicopters sporting long appendages are flying over some rural areas of the country, including here in Colorado. Many of ...