Category Archives: Science News

Ancient crystal growths in caves reveal seas rose 16 meters in a warmer world

The future of sea level rise may be written into the walls of coastal Spanish caves.

Mineral “bathtub rings” deposited inside the limestone Artà Caves on the Balearic island of Mallorca show how high seas rose during the Pliocene Epoch — a time when Earth was about as warm as it’s expected to get by 2100. Those mineral deposits suggest the planet’s seas were around 16 meters higher on average than they are today, researchers report August 30 in Nature.

Continue reading Ancient crystal growths in caves reveal seas rose 16 meters in a warmer world

Cave detective hunts for clues to past sea level

A yellow splash of light from Bogdan Onac’s headlamp bounces around the dripping orange walls of a cave like a frenetic firefly. At the other end of the beam, the University of South Florida paleoclimatologist explains that the walls of this cave, on the Mediterranean island of Majorca, have collected a bathtub ring of minerals as brackish water washes in and out. “Majorca is like a Gruyère,” Onac says, its underlying limestone filled with holes just like the cheese. Continue reading Cave detective hunts for clues to past sea level