Landslides caused by the collapse of unstable volcanoes are one of the major dangers of volcanic eruptions. A method to detect long-term movements of these mountains using satellite images could help identify previously overlooked instability at some volcanoes, according to Penn State scientists.
Jesse Reimink remembers the first time someone planted the Earth science seed that for him blossomed into a career in the geosciences.
Nearly two decades ago, Reimink was a high school student of Chris Bolhuis, a nationally recognized teacher with a passion for promoting Earth science education. Reimink, now an assistant professor of geosciences at Penn State, said Bolhuis gave him that sense of wonderment about the world we live in and it inspired him to both teach and conduct research.
No other glacier has received as much attention in recent years from the scientific community as West Antarctica’s Thwaites Glacier. The glacier sits mostly on land, which means that melt from the glacier will cause sea levels to rise. Sridhar Anandakrishnan, professor of geosciences at Penn State, will give an overview of Thwaites Glacier and discuss the prospects for sea-level rise from this and similar glaciers at 11:15 a.m. Wednesday, Jan. 27. The talk will be broadcast via Zoom.
Megathrust earthquakes and subsequent tsunamis that originate in subduction zones like Cascadia — Vancouver Island, Canada, to northern California — are some of the most severe natural disasters in the world. Now a team of geoscientists thinks the key to understanding some of these destructive events may lie in the deep, gradual slow-slip behaviors beneath the subduction zones. This information might help in planning for future earthquakes in the area.
The asteroid impact 66 million years ago that ushered in a mass extinction and ended the dinosaurs also killed off many of the plants that they relied on for food. Fossil leaf assemblages from Patagonia, Argentina, suggest that vegetation in South America suffered great losses but rebounded quickly, according to an international team of researchers.
Tucked into the rolling hills of Stone Valley, Cole Farm seems like a typical central Pennsylvania farm. A gravel driveway slopes down to a steel and wood-plank bridge that spans Shaver’s Creek. The path continues relatively flat, past a murky green retention pond and two barns, to a log farmhouse nestled at the base of a hill. A spring trickles through the wooded swale west of the house. Sloping fields are flush with alfalfa, corn, hay grass, and wheat.
Geoscientists have long known that some parts of the continents formed in the Earth’s deep past, but the speed in which land rose above global seas — and the exact shapes that land masses formed — have so far eluded experts.
While the seas were still churning from the impact and the seawater temperatures were high due to the hydrothermal activity, life was reestablishing itself inside the crater.
Katherine Freeman, Evan Pugh University Professor of Geosciences at Penn State, has been awarded the 2020 Nemmers Prize in Earth Sciences. The prize is awarded by Northwestern University and recognizes achievement and work of lasting significance in the field of Earth sciences.
Freeman was selected “for her pioneering and continued contributions to development of the field of compound-specific stable isotope geochemistry and its application to fundamental problems in Earth science."
Pyrite, or fool’s gold, is a common mineral that reacts quickly with oxygen when exposed to water or air, such as during mining operations, and can lead to acid mine drainage. Little is known, however, about the oxidation of pyrite in unmined rock deep underground.
A new, multi-scale approach to studying pyrite oxidation deep underground suggests that fracturing and erosion at the surface set the pace of oxidation, which, when it occurs slowly, avoids runaway acidity and instead leaves behind iron oxide “fossils.”