United States Geological Survey

The science of sinkholes

A devastating sinkhole occurred in Florida on February 28, 2013, raising questions and concerns about this incredible phenomenon. Around 20% of the U.S. lies in areas susceptible to sinkhole events, highlighting ...

Mar 06, 2013 3.2 / 5 (5) 0

Iowa meteorite crater confirmed

(Phys.org) —Recent airborne geophysical surveys near Decorah, Iowa are providing an unprecedented look at a 470- million-year-old meteorite crater concealed beneath bedrock and sediments.

Mar 05, 2013 4.9 / 5 (14) 0 | with audio podcast

How does groundwater pumping affect streamflow?

Groundwater provides drinking water for millions of Americans and is the primary source of water to irrigate cropland in many of the nations most productive agricultural settings. Although the benefits of groundwater development ...

Nov 16, 2012 not rated yet 0