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Grand Canyon, Arizona

Geologists dig into Grand Canyon’s mysterious gap in time

The Alum Shale, here an example of a coastal deposit, consists of quartz and potassium Feldspar clasts as well as conspicuous Pyrite crystals (here: white) embedded in a clayey matrix. Scanning electron micrograph (scale: lower image edge length corresponds to approx. 40 μm). Credit: Schulz, GFZ

A rock with many perspectives

Mud Volcanoes

The geological record of mud deposits

Francis Macdonald walks along a road near Manitou Springs, Colorado, where an exposed outcrop shows a feature known as the "Great Unconformity."

The Great Unconformity : A billion years is missing from the...

Arial view of the Bungle Bungle range, May 2016. Credit: Creative Commons Attribution-Share Alike 4.0 International license. Nichollas Harrison

How the Bungle Bungles got their stripes

Researchers doing fieldwork in KwaZulu-Natal, South Africa. Credit: Stuart Gilfillan

Rare gas find solves African landscape puzzle

Peaty sedimentary archive from a palm swamp collected with a Russian corer. (Image:Encarni Montoya)

A new study shows the evolution and changes of the vegetation...

Research vessel JOIDES Resolution off the coast of Hawaii. Credit: International Ocean Discovery Program.

Deep-sea sediments reveal solar system chaos: An advance in dating geologic...

A new study from The University of Texas at Austin looks at the complex geology that contributed to the 2010 Deepwater Horizon disaster.

Complex geology contributed to Deepwater Horizon disaster, new study finds

Engineering Geology

Engineering Geology : What is engineering geology and its importance?

K-T Boundary / K-Pg Boundary

K-T Boundary “Cretaceous-Tertiary Boundary”

Badlands near Drumheller, Alberta

K-Pg Boundary “Cretaceous–Paleogene Boundary”

Massachusetts State Geologist Stephen Mabee and colleagues recently annoucned that newly digitized surficial geology maps of the entire state are available online now. They provide details of what Mabee calls the 'kitty litter' mix of glacial tills, various sands and gravels on the earth's surface. Credit: USGS/MassGIS

State geologist, partners create new surface geology maps for Massachusetts

Taking a soil core from underwater soil is a bit trickier than soil that's on the surface. Scientists have to utilize boats and plunge the sampling equipment through water and down into the soil.

Getting to the core of underwater soil

The iron cycle in the ocean

Tracing iron in the North Pacific

Igneous intrusion

What is a Plutonic Igneous Rock?

Lavacicle Caves

Geology of Lavacicle Caves

New research predicts landslide boundaries two weeks before they happen

Continental plates around Greenland.

Icy Greenland’s heated geologic past

Earth

Geologist leads effort to update Earth’s geologic time scale

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