Pain, Strain and Gain on the Rae Lakes Loop

From microscopic plankton to billions of barrels of oil, few rock formations have shaped California's history more profoundly than the Monterey formation.

Lookout Mountain obsidian became prized toolstone, traded through Indigenous networks from the eastern Sierra to the Channel Islands.

Supervolcanoes, Hot Springs, Fumaroles, Yellow Lakes, and Other Geologic Wonders of Mammoth Lakes

An 18.6-year lunar cycle is expected to amplify tides just as rising seas push more of California’s coastline toward flooding thresholds.

A threatened population of green sea turtles is thriving in the concrete channels of the San Gabriel River in Long Beach.

Exfoliation helped create Yosemite’s famous rounded granite domes and continues to peel the cliffs apart in massive sheets of rock.