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Igneous zircon crystal: shows zircon had two main growth periods approx. 20 million years apart in different magmas.

Zircon as Earth’s timekeeper: Are we reading the clock right?

October 24, 2017

Newly Discovered Flux in Earth May Solve Missing-Mantle Mystery

July 17, 2013

Early amber trade: Sicilian amber in Western Europe predates arrival of...

August 30, 2018

Fault zone with broken rock inside stippled lines and faulting directions of each rock segment outlined by half arrows. Photo credit: Henrik Drake. Illustration: Mikael Tillberg.

A new method for dating ancient earthquakes

January 20, 2020

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Angelenos play below derricks at Huntington Beach pier, c. 1930-40. In the early decades of the twentieth century, LA residents accepted ground subsidence and small earthquakes as the cost of producing oil. But discontent began to rumble in the late 1930s. Rapid exploitation of Wilmington, one of the largest oil fields in California, and the Huntington Beach field caused Long Beach harbor to sink, buckling railway lines and forcing the city to build higher piers. Credit: Orange County Archives

Oil extraction likely triggered mid-century earthquakes in L.A.