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What are the three main types of faults?

What is a fault? A fault is a fracture or zone of fractures between two blocks of rock. Faults allow the blocks to move relative...

What Is a Geologic Fault?

A fault is a planar fracture or discontinuity in a volume of rock, across which there has been significant displacement as a result of...

Study Confirms Large Earthquakes along Olympic Mountain Faults

A comprehensive study of faults along the north side of the Olympic Mountains of Washington State emphasizes the substantial seismic hazard to the northern...

Sampling of the active alpine fault in New Zealand reveals extreme...

A recent study published in Nature has demonstrated unusual heat generation and fluid movement in the Alpine Fault of New Zealand that has implications...

Foreshock activities leading up to Pawnee earthquake

A University of Oklahoma geophysics professor, Xiaowei Chen, details the foreshock activities leading up to the Pawnee earthquake, and highlights the complicated relationship between...

How Strike-Slip Faults Form, the Origin of Earthquakes

Structural geologist Michele Cooke calls it the "million-dollar question" that underlies all work in her laboratory at the University of Massachusetts Amherst: what goes...

Faulted Sedimentary Rock Layers, Guatemala

Photograph of faulted sedimentary rock layers exposed in a roadcut in Guatemala. The sedimentary rocks originally were deposited as horizontal layers of sand and...

Signs of past California ‘mega-quakes’ show danger of the Big One...

As Interstate 10 snakes through the mountains and toward the golf courses, housing tracts and resorts of the Coachella Valley, it crosses the dusty...

The Blue Anchor Fault

Found on the Somerset coast in England, this crack in the rocks is a normal fault, where younger rocks have been downthrown by tectonic...

New Zealand quake scientists discover surprise

When researchers in New Zealand drilled deep into an earthquake fault, they stumbled upon a discovery they say could provide a significant new energy...

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