The most studied battleground from the American Civil War, from a geological perspective, is the rolling terrain surrounding Gettysburg, Pennsylvania. Here, the mixture of harder igneous and softer sedimentary rocks produced ...
Earth Sciences
Mar 17, 2016
0
1991
On the evening of 5 August 2013, a startling event occurred deep in the remote interior of the United States' largest national park. A half-kilometer-long tongue of Alaska's Flat Creek glacier suddenly broke off, unleashing ...
Earth Sciences
Apr 28, 2020
7
638
The geode of Pulpí is an 11-meter hollow ovoid with crystal-paneled walls. It is like those familiar couplets of stone interiors covered with bright crystallites, but so large that several people can fit inside. The crystals, ...
Earth Sciences
Oct 15, 2019
0
205
From the Great Pacific garbage patch to inland rivers, plastics are among the most widespread contaminants on Earth. Microplastics—particles of plastic smaller than five millimeters—are especially pervasive. As they build ...
Environment
Sep 24, 2019
0
143
Rapid glacial advance reconstructed during the time of Norse occupation in Greenland
Earth Sciences
Mar 25, 2022
4
103
Great Salt Lake is well known for being salty, but record-low water levels driven by high water usage and several years of drought may soon make it too salty for even the brine shrimp that have made it a home. The lake provides ...
Ecology
Oct 7, 2022
1
130
The impact event that formed the Chicxulub crater (Yucatán Peninsula, México) caused the extinction of 75% of species on Earth 66 million years ago, including non-avian dinosaurs. One place that did not experience much ...
Earth Sciences
Jul 14, 2020
1
237
The late Devonian extinction, about 370 million years ago, is one of the 'Big Five.' It killed up to 80 percent of species, obliterating the lavish Devonian coral reef ecosystem. The final pulse in this multi-step crisis, ...
Earth Sciences
May 1, 2018
4
311
Beneath the cold, dark depths of the Arctic ocean sit vast reserves of methane. These stores rest in a delicate balance, stable as a solid called methane hydrates, at very specific pressures and temperatures. If that balance ...
Earth Sciences
Mar 22, 2021
23
1786
Boulder, Colo., USA: Rare metallic elements found in clumps on the deep-ocean floor mysteriously remain uncovered despite the shifting sands and sediment many leagues under the sea. Scientists now think they know why, and ...
Earth Sciences
Jan 14, 2020
2
337
