A recent study by Kristin Morell and colleagues reveals the Himalayan Front's central seismic gap is overdue for a major earthquake. The researchers used geomorphic and erosion rate data to define the active detachment fault likely to host a large earthquake, pinpointing a distinctive physiographic transition in Uttarakhand, India.
Rome was a 'smart city' due to its minimal alteration of natural features and resource management. In contrast, Naples faced more geological hazards and limited resources, constraining its growth. Over time, both cities became unstable due to rapid urban expansion and increased natural disasters
The Mississippi Delta is facing an uncertain future due to the combined effects of sea-level rise and land subsidence. The study uses precise GPS data and tide gauge records to measure subsidence rates, revealing that parts of the delta may not be viable in the long term.
Researchers have uncovered new insights into the structural controls of fluid pathways in an active rift system, with potential implications for geothermal exploration. The study focuses on Aluto volcano, a major source of geothermal energy in Ethiopia's Rift Valley.
The Capitanian extinction, dated to 262 million years ago, is now recognized as a major extinction event globally, with severe losses in brachiopods at high latitudes and widespread loss of carbonates across the Boreal Realm. This new evidence supports its status as a true mass extinction, updating the 'Big 5' list to the 'Big 6'.
A LiDAR study documents the impact of a 2013 Colorado Front Range flood on the landscape, revealing unprecedented hillslope failures and landslides. The research highlights the role of rare events in shaping landscapes over time scales that greatly exceed historical records.
Researchers have discovered rare spring deposits and playa formations on Mars that point to the presence of a hydrological cycle and groundwater upwelling. These findings support the idea that conditions on Mars could have been conducive to microbial colonization.
A new study suggests that a 40,000-year-old volcanic eruption may not have triggered the final demise of the Neanderthals. Climate modeling indicates that temperatures decreased by 2-4 degrees Celsius in Western Europe after the eruption, which could have impacted day-to-day life for both Neanderthals and early humans.
Unaweep Canyon, the only canyon with two mouths, formed in multiple stages ~300 million years ago. The inner gorge was incised by the Gunnison River as part of the incision of the Colorado Plateau, linking events on the northern and southern Plates. This study highlights the preservation of ancient landscapes from Earth's deep-time past.
Researchers have discovered a mechanism for generating glass spherules through the combination of lightning and volcanic ash. The study, published in Geology, reveals that high heat generated by lightning discharge can transform volcanic ash particles into spheres of glass, forming fulgurites in geologic deposits.
Researchers develop a new relationship between soil magnetic properties and precipitation, doubling the potential range of terrestrial paleoclimate applications. This improves understanding of hydrologic conditions in the deep past, leading to more accurate predictions of water availability and ecosystem stability in a warmer world.
The study finds that the Dinner Creek Tuff Eruptive Center was a common source for mafic and silicic magmatism, linking the GRB eruptions and providing evidence for the location of Columbia River Basalt storage sites. This suggests that shallow crustal rhyolitic reservoirs played a key role in controlling the timing and place of eruption.
Researchers suggest that human dispersal into southern Asia via Arabia was linked to changing climate and environmental conditions, with increased rainfall supporting populations. The Al Sibetah alluvial fan sequence provides a unique record of landscape change in southeast Arabia, revealing multiple humid episodes during glacial periods.
In the Early Triassic period, a prolonged period of delayed ecological recovery led to the widespread production and preservation of vertebrate swim tracks. This was due to minimal sediment mixing in stressful environments, which created firm-ground substrates ideal for recording subaqueous trace fossils.
Researchers document fault rocks surrounding New Zealand's active Alpine Fault, recording slip rates and influencing earthquake processes. The study provides insights into the complex fault rock sequence resulting from past earthquakes, with potential applications for realistic ground shaking predictions.
Researchers analyzed the 2010 Eyjafjallajökull eruption to understand the dynamics of gravitational instabilities and particle aggregation. They found that these phenomena can significantly reduce fine-ash lifetime in the atmosphere, highlighting their importance in improving ash dispersal forecasting.
Seismic investigations reveal extreme mantle perturbation and crust-mantle interaction in Eastern China's Qinling-Dabie-Sulu orogenic belt. The region was affected by compressional deformation due to collision between North and South China blocks.
Researchers studied sediment rocks in Italian Dolomites and found high acidity levels, similar to vinegar or lemon juice, indicating repeated acid rain events. These acidic conditions led to a decline in plant life, causing a collapse in the food chain and contributing to the mass extinction of end-Permian life on land.
Researchers from Italy and Brazil present a new conceptual model of staircase fractures in microbialites and travertines, enhancing permeability by connecting highly porous zones. This understanding is valuable for locating water supplies and exploring oil, gas, and geothermal resources.
A new study by Andrew J. Retzler and colleagues presents a revised map characterizing the size and shape of the Alamo crater. The researchers estimate the crater's diameter to be between 111 and 150 km, more than double previous estimates. This places the Alamo crater as one of the largest marine impacts in the last 550 million years.
Researchers analyzed data from the 2008 Wenchuan earthquake and found that sediment in affected river catchments remained for decades, longest where landsliding was highest. They also discovered low friction in the fault zone, contradicting previous observations.
Historical records describe the intense Kamikaze typhoons that struck Japan in 1274 and 1281, preventing a Mongol conquest. A new sedimentary reconstruction reveals these storms were more frequent during this time period, supporting their significant role in shaping Japan's geopolitics.
Researchers are studying the dynamic behavior of a large rhyolitic system at Laguna del Maule, where magma is rising to depths of 5km. The study aims to understand how these systems form and erupt to better predict potential caldera-forming eruptions.
Researchers reconstructed the spatial pattern of major earthquakes along the Tangshan-Hejian-Cixian fault in Tianjin, revealing a 160-km seismic gap that has not been ruptured for over 8,400 years. This gap may be the next to rupture, generating a devastating earthquake similar to the 1976 Tangshan earthquake.
Research finds that the Darrington-Devils Mountain fault zone is prone to strong earthquakes, with evidence of a M 6.7 to 7.0 quake 2,000 years ago and another at 8,000 years old. This suggests a right-lateral slip sense during past earthquakes, which may be related to ongoing clockwise rotation in the region.
Research suggests that most fatalities from the 1790 Kīlauea eruption were caused by hot surges of volcanic debris and steam. The volcano has experienced both effusive and explosive eruptions, with explosive events being geologically common but less frequent in recent times.
Researchers analyzed 1,400 damage sites to determine relationships between ground deformation and faults. They found evidence of reverse movement along preexisting faults, which caused widespread ground deformation in the San Andreas fault region.
Tuolumne Meadows was formed due to preferential glacial erosion of fractured bedrock, resulting in a unique landscape. The study found that tabular fracture clusters played a crucial role in shaping the meadow's topography.
A recent study published in Geology reveals that harmonic tremor occurs within mountain glaciers and that individual icequakes can exhibit harmonic properties. This discovery suggests a complex network of fluid-induced fracture processes at the glacier base, which can lead to damaging floods in valleys below the glacier.
The nation's first tsunami evacuation refuge is being built in Washington state to shelter over 1,000 people within a 20-minute walking distance. The vertical structure will be the roof of an elementary school gym, designed to withstand massive earthquakes and storm surges.
Paleontologists uncover fatal stab wound in allosaur's pubis bone, suggesting stegosaurs wielded their tails as deadly weapons. The discovery challenges conventional views of stegosaurs as lumbering plant-eaters, highlighting their impressive dexterity and fighting skills.
Recent great earthquakes have provided unprecedented insights into seismic activity, highlighting the complexities of ruptures and interactions with surrounding regions. The study focuses on Cascadia, where advances in technology and scientific capacity enable a better understanding of future earthquake risks.
Researchers use tiny pieces of fossilized tree resin to study ancient environments, plant life, and dinosaur habitats. The findings shed light on the ecosystems in which dinosaurs lived, including the interactions between dinosaurs and insects.
Researchers Elise Harrington and Allan Treiman re-analyzed twenty-year-old spacecraft data to study Venus's surface. They found radio waves reflected differently at different elevations, creating a pattern of brightening with increasing elevation, followed by 'radio black' spots at the highest locations.
Researchers have discovered naturally occurring asbestos in Boulder City, Nevada, posing a risk to local residents. The fibrous minerals were found in areas not previously considered at risk, highlighting the need for further investigation into their occurrence and toxicity.
Researchers presented findings on North America's future fire threats and the role of humans in megafauna disappearance. Paleontological data is being used to inform studies of modern ecological processes and communities.
New research suggests that Chicxulub's impact was not the sole cause of the end-Cretaceous mass extinction. Volcanism, climate changes, and other factors also played significant roles in four out of five major mass extinctions in Earth history.
Researchers identify jarosite minerals in Ius Chasma canyon wall, suggesting atmospheric sulfur trapped in ice formed glaciers. The discovery provides evidence of past glaciation in the Valles Marineris on Mars.
In September 2013, Colorado experienced massive flooding triggering over 1,100 debris flows across a 3,400 square kilometer area. The floods were initiated on steep slopes with high areal concentrations of colluvial soils on sedimentary rocks.
A new rock formation, Tava sandstone, has been discovered in the Colorado Rockies, featuring an unusual relationship with older rocks. The formation is believed to have resulted from large earthquakes or other catastrophic events, and its age dates back to ~750 million years ago during the Cryogenian Period.
Numerical models suggest that Miranda's corona formation was driven by tidal heating and convection in the ice mantle. This process is similar to plate tectonics on Earth, resulting in extensional tectonic faults and surface deformation.
Researchers use tree rings to date arroyo sedimentary beds and combine data with aerial imagery and LiDAR to reconstruct the history of these arroyos. The study reveals that arroyos are unstable features that shift between broad floodplains and incised channels, and that upstream progression is limited to specific locations.
Researchers developed a new system using high-resolution topography models and structure from motion to study active faults and their role in earthquakes. The method produces comparable quality data at lower costs, enabling geologists to analyze prehistoric ruptures and surface rupture formed during earthquakes.
Researchers used leaf vein density to study stratified forests with canopy-dominant flowering plants. They found that venation density is higher in leaves from the forest canopy and decreases towards lower levels. This pattern suggests that flowering plants emerged in the upper forest canopy by the Paleocene, around 58 million years ago.
Researchers in southern Africa used beryllium-10 and aluminum-26 to measure erosion rates, finding five meters per million years in non-tectonically active regions. This rate is significantly lower than basin-average erosion rates, with stable upland surfaces remaining unchanged since the Pliocene.
Researchers used clumped isotope thermometry to reconstruct the Zhada basin's paleo-elevation history, finding a significant drop of over 1 km in elevation between three and nine million years ago. This suggests that the modern high elevations were not recently developed but rather a continuation of higher elevations prior to the Indo-...
Researchers found that natural hydraulic fractures formed over time spans of 33 to 35 million years, driven by the slow generation of natural gas. These fractures play a crucial role in modern hydraulic fracturing production, connecting pores in reservoir rock to the hydraulic fracture and wellbore.
New research by Steve Israel and colleagues reveals that the Northern Cordillera is a 'collage' of terranes with shared histories, blurring the definition of tectonic terranes. This challenges long-held assumptions about the geologic history of North America.
The Lucinidae family's symbiotic relationship with seagrasses dates back to the Cretaceous period, allowing them to thrive in oxygen-poor environments. This unique partnership provided a rich supply of sulfur-oxidizing bacteria, which the bivalves consumed and seagrasses benefited from the uptake of toxic sulfide.
The construction of the Upamayo Dam in Peru's central Andes led to the discharge of Río San Juan waters into Lake Junín, causing widespread contamination with heavy metals. Climate change and mining activities have exacerbated this environmental disaster, highlighting the need for sustainable hydroelectric practices.