(Geological Society of America) The vestiges of lakes long extinct dot the landscape of the American desert west. These fossilized landforms provide clues of how dynamic climate has been over the past few million years.
(Geological Society of America) Pleistocene basaltic lavas form a small volcanic field that was erupted from seven vents in the northwestern Lake Tahoe basin. Most of these lavas were erupted above the water and produced lava flows that dammed the lake outlet and flowed into an early Lake Tahoe. Show More Summary
(Geological Society of America) The biggest landslides on Earth aren't on land, but on the seafloor. These mega-slides can move thousands of cubic kilometers of material, and sometimes trigger tsunamis. Yet, remarkably, they occur on nearly flat slopes of less than three degrees.
(Geological Society of America) In Oklahoma, reducing the amount of saltwater (highly brackish water produced during oil and gas recovery) pumped into the ground seems to be decreasing the number of small fluid-triggered earthquakes....Show More Summary
(Geological Society of America) Geologists exploring volcanic rocks on Scotland's Isle of Skye found something out-of-this-world instead: ejecta from a previously unknown, 60 million-year-old meteorite impact. The discovery, the first...Show More Summary
(Geological Society of America) GSA's governing Council approved a new position statement, Geoscience and Energy Policy, at its October 2017 meeting in Seattle, Washington. "This has been a long time coming," said GSA President Isabel Montañez. Show More Summary
A team of scientists presented a research paper to the Geological Society of America, revealing some ground shaking information. The paper has warned that there could be a big increase in numbers of devastating earthquakes around the world next year caused by the slowing down of the Earth’s...
For this invited blog by AZGS's newest hire Andrew Zaffos, visit our new Arizona Geology blog site: http://blog.azgs.arizona.edu Andrew Zaffos in the center.
(Geological Society of America) The Norian Chinle Formation in the Southwestern United States provides a snapshot into an ancient terrestrial ecosystem with its famous petrified tree trunks and various plant and vertebrate remains. The...Show More Summary
(Geological Society of America) A new geological record of the Yellowstone supervolcano's last catastrophic eruption is rewriting the story of what happened 630,000 years ago and how it affected Earth's climate. This eruption formed the vast Yellowstone caldera observed today, the second largest on Earth.
(Geological Society of America) On Saturday, 22 March 2014, a devastating landslide roared across the North Fork of the Stillaguamish River, near Oso, Washington. The landslide killed 43 people as it plowed through the Steelhead Haven neighborhood. When it stopped, after crossing the river, the neighborhood, and State Route 530, the Oso landslide had traveled 1.4 kilometers.
(Geological Society of America) When the Chicxulub asteroid slammed into Earth about 66 million years ago, it obliterated 80 percent of Earth's species, blasted out a crater 200 kilometers across, and signaled an abrupt end to the Cretaceous Period. Show More Summary
(Geological Society of America) Rising sea levels and human activities are fast creating a 'worst case scenario' for Native Americans of the Mississippi Delta who stand to lose not just their homes, but their irreplaceable heritage, to climate change.
(Geological Society of America) A new volume prepared in conjunction with GSA's 2017 Annual Meeting offers ten guides that geographically focus on the Seattle, Washington, area within the Puget Lowland, and also includes descriptions of trips in the Cascade Range, the region east of the Cascades, and the Columbia River Basin and western Idaho.
(Geological Society of America) Earth has two types of crust: oceanic crust is relatively young, dense, and made at mid-oceanic spreading centers, whereas continental crust is buoyant, old, and believed to be created in magmatic arcs. Show More Summary
(Geological Society of America) GSA is preparing to Livestream four thought-provoking lectures by leaders in their fields from its Annual Meeting & Exhibition in Seattle, 22-25 October 2017.
(Geological Society of America) Plates collide and mountain ranges form, and the why and how are key to understanding orogenic processes. This volume explores linkages between tectonic processes through a series of field, numerical modeling,...Show More Summary
(Geological Society of America) Category 5 hurricanes may have slammed Florida repeatedly during the chilly Younger Dryas, 12,000 years ago. The cause? Hurricane-suppressing effects of cooler sea surface were out-weighed by side effects of slowed ocean circulation. Show More Summary
(Geological Society of America) The Seattle community is invited to spend an afternoon learning about local geology, courtesy of the Geological Society of America's (GSA) Annual Meeting & Exhibition, being held at Seattle's Washington State Convention Center, Oct. 22-25.
(Geological Society of America) The fossil history of animal life in India is central to our understanding of the tectonic evolution of Gondwana, dispersal of India, its northward journey, and its collision with Asia. This beautifully...Show More Summary