Smith illustrated the order in which rock layers occur by using darker shades ... He made his first small-scale attempts to prepare a national geological map in 1801, sketching the outcrop pattern of ...

A new assessment says there's about 27 trillion cubic feet of natural gas — close to what the U.S. consumes in a year — and ...

The USGS has released its first-ever map of where ... being included in crushed stone production. The new national map shows that pyrrhotite may be distributed widely in metamorphic rock along the ...

Enchanted Rocks & Jewelry in Llano sits near the center of one of the richest geological areas in ... The most obvious head to this pink outcrop is Enchanted Rock, about 20 miles south of Llano.