14 Mar '18, 2pm

Sand Rush in Wisconsin

There is a mineral rush underway in the Upper Midwest—for sand. Western Wisconsin, in particular, has become the epicenter of the rush due to the continuing horizontal drilling and hydrologic fracturing , or fracking, boom in the United States. The unusually round, hard, well-sorted, silica-rich sands of western Wisconsin make them ideal frac sand . Gas and oil companies use sand as a “proppant.” Drilling operators add sand to the mix of water and other chemicals that gets pumped underground at high pressures. The force of the liquid and sand mixture creates small fractures in shale rock, and the sand grains help keep these cracks propped open after the pumps turn off. This allows the gas and oil to seep out. On November 7, 2017, the Operational Land Imager (OLI) on Landsat 8 acquired this image (above) of several sand mines near Chetek, Wisconsin. The mines appear light b...

Full article: https://earthobservatory.nasa.gov/IOTD/view.php?id=91835&...

Tweets

Higer Bus Fleet Delivered an Impressive Perform...

chinabuses.org 14 Mar '18, 10am

Higer Bus Fleet Delivered an Impressive Performance in China’s Spring Festival Travel Rush 2018-03-14 Author: Source:www.c...

Samalayuca Sand Dunes

earthobservatory.nasa.gov 23 Mar '18, 10pm

When sheets of ice spread across North America during the Pleistocene Epoch , many pluvial lakes formed well beyond the ed...

Samalayuca Sand Dunes

earthobservatory.nasa.gov 24 Mar '18, 2pm

When sheets of ice spread across North America during the Pleistocene Epoch , many pluvial lakes formed well beyond the ed...