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limestone

A mound of clay in a flow tunnel is eroded by water.
Posted inNews

Did These Curious Rock Formations Inspire the Great Sphinx?

by Nathaniel Scharping 3 November 20233 November 2023

New research says it’s plausible the Great Sphinx started life as a geomorphological oddity known as a yardang.

A person stands in a dark cave holding a flashlight.
Posted inNews

Searching for the Sculptor of France’s Caves

Jenessa Duncombe, Staff Writer by Jenessa Duncombe 31 March 202331 March 2023

Spelunking scientists searched for the original source of the French Pyrenees’ magnificent caves.

Australia’s remote Nullarbor Plain.
Posted inNews

A Mysterious Dome Reveals Clues to Australia’s Miocene History

by Nathaniel Scharping 17 October 202217 February 2023

The Nullarbor Plain has been relatively untouched by geological forces, leaving traces of the continent’s deep past.

Roman ruins in the ancient city of Volubilis, Morocco
Posted inNews

Roman-Era Millstone and Mixer Makers Knew Their Rocks

by Carolyn Wilke 18 November 202128 March 2023

The geochemistry of basalt millstones and mixers from the city of Volubilis suggests a local origin—and that rocks were picked for specific purposes, from crushing olives to mixing dough.

Map of Kentucky showing indoor radon potential
Posted inNews

Detailed Geologic Mapping Helps Identify Health Hazards

Sarah Derouin, Science Writer by Sarah Derouin 27 July 202113 October 2022

A team of geologists and nursing researchers created an interactive radon hazard map for Kentucky residents—and it was possible only because of the high-resolution bedrock mapping in the state.

Looking out from inside Lower Antelope Canyon, with the sky near the top of the frame. Characteristic layering in the sandstone is visible.
Posted inResearch Spotlights

The First Angstrom-Scale View of Weathering

Kate Wheeling, freelance science writer by Kate Wheeling 15 March 202113 October 2022

Researchers observe how water vapor and liquid alter sedimentary rocks through physical and chemical processes.

A roadcut in Kentucky reveals layers of Camp Nelson Limestone
Posted inResearch Spotlights

Certain Rock Formations Can Lead to In-Home Radon Risks

Aaron Sidder, freelance science writer by Aaron Sidder 11 December 202013 October 2022

Researchers in Kentucky have merged results from home test kits with the state’s geologic map to produce a map of indoor radon potential based on the geology underlying homes in the state.

The entrance to the Hranice Abyss in the eastern Czech Republic.
Posted inResearch Spotlights

World’s Deepest Freshwater Cave May Be a Kilometer Deep

by Lauren Lipuma 8 September 202013 October 2022

The Czech Republic’s Hranice Abyss is more than twice as deep as researchers thought.

The Washington Monument peeks out from behind a sandstone gatepost
Posted inGeoFIZZ

Self-Guided Tour of the Geology in D. C. Buildings

by L. Strelich 6 December 201813 October 2022

The architecture of the nation’s capital reveals a secret geologic history—take a walking tour to spot the interesting fossils and minerals in the stones used to build the halls of power.

Posted inEditors' Highlights

Acoustic Monitoring of Inelastic Compaction in Porous Limestone

by A. Revil 12 April 201813 October 2022

During triaxial compression experiments, acoustic monitoring reveals compaction localization in a high porosity limestone, accompanied by a significant decrease in P-wave velocity.

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