Compositional or metamorphic layers of rocks may bend during ductile deformation to produce folds. Folds commonly form during regional horizontal shortening in orogenic (mountain building) belts at microscopic to regional scales in all rock types...

Strata are layers of rock, whether of sedimentary (e.g., sandstone or limestone) or of extrusive igneous (e.g., lava flow) origin. Sedimentary strata are formed when Earth's gravity acts upon particles being transported by wind, water, or ice...

The term fold is used in geology when one or a stack of originally flat and planar surfaces, such as sedimentary strata, are bent or curved as a result of plastic (i.e. permanent) deformation. Synsedimentary folds are those due to slumping of material...

Two spacewalking astronauts finished folding up a stubborn, accordion-like solar array Monday, resolving the only complication in space shuttle Discovery's otherwise smooth mission to the international space station.Shuttle astronauts Robert Curbeam and Christer Fuglesang managed to get the last section of the 115-foot array folded...

Two astronauts floated outside the international space station Saturday aiming to finish up rewiring the orbiting outpost and getting a stubborn solar array folded up so that a fourth, unplanned spacewalk isn't needed.U.S. astronauts Robert Curbeam, who has taken two previous spacewalks this week, and...

The WNBA's Charlotte Sting folded Wednesday, three weeks after the Bobcats gave up control of the team.The WNBA was unsuccessful in finding a buyer for the Sting, one of the original eight franchises."It was driven by economics, certainly not philosophy," said Greg Economou, the Bobcats'...

Anyone who's ever tried to fold a well-used map can probably relate to the challenge Discovery astronauts face in the next phase of their mission.One of the station's solar panels needs to be retracted Wednesday to make room for another panel that will begin rotating...