Articles tagged with Rocks
Deformation mechanisms of serpentinite, a key research target for understanding plate boundaries, have been investigated. Grain boundary sliding dominates deformation, producing 'B-type' CPO patterns, which contribute to seismic activity and earthquakes.
Researchers at Tohoku University found that kink bands in rock layers exhibit strengthening rather than weakening under compressive forces, contradicting previous assumptions. The rank-1 connection ensures smooth continuity between deformed regions, leading to increased material strength.
A massive meteorite impact in Scotland, previously believed to occur 1.2 billion years ago, has been dated to 990 million years ago. This discovery has significant implications for our understanding of the evolution of non-marine life on Earth and its potential influence on environmental conditions.
Researchers from China, UK, and USA collaborated to study Uturuncu volcano's 'zombie' behavior, finding that movement of liquid and gas beneath the crater is the cause of unrest. The risk of an imminent eruption is considered low, alleviating fears for local populations.
A study by Christie Rowe and Alex Hatem found that faults are typically branching networks of fault strands, making them hundreds of meters wide. This suggests that significant parts of the broad array of fractures can be activated in a single earthquake.
Researchers found that strong ground acceleration within a stepover geometry can launch boulder-sized rocks briefly defying gravity. The study suggests stronger shaking in the area nearest to the fault around stepovers and complex fault geometries should be accounted for in ground motion predictions.
Computer simulations show that captured CO2 can be permanently stored underground by mixing with groundwater, creating a denser liquid that sinks and remains there. Suitable geological conditions, such as impermeable rock layers and porous aquifers, are necessary for effective CO2 storage.
A new study led by UCL researchers found that the quality of the dinosaur fossil record worsened during the final 6 million years prior to the asteroid impact. The team analyzed over 8,000 fossils and estimated that dinosaurs may have been doing better than previously suggested in the lead-up to the asteroid impact.
A mass mortality event occurred in Triassic Wyoming, where dozens of giant amphibians called metoposaurid temnospondyls died together on an ancient floodplain. The study provides a unique snapshot of a single population and doubles the known number of individuals of the species Buettnererpeton bakeri.
A new study in PLOS One reveals over 130 dinosaur footprints on the Isle of Skye, providing insight into their distribution and behavior. The trackways suggest large theropods like Megalosaurus and sauropods like Cetiosaurus strolled through ancient subtropical lagoons.
Researchers have discovered that the underside of the North American continent is experiencing 'cratonic thinning', a phenomenon where the continent is slowly losing its stability and rock layers. This process, driven by the subduction of the Farallon Plate, may eventually stop as the plate sinks deeper into the mantle.
A study suggests that children were involved in creating prehistoric cave art due to their unique mental and cognitive traits, which allowed them to communicate with entities from the beyond. Children were believed to be liminal beings, bridging the gap between worlds, and delivering messages to non-human entities.
A team of researchers describes the circumstances of a rare 2019 meteorite fall near Aguas Zarcas in northern Costa Rica, challenging the notion that mudball meteorites are weak. The recovered 27-kilogram meteorite, nicknamed 'Aguas Zarcas,' avoided collisions in space and did not exhibit cracks that weaken many meteorites.
Dr. Rita Okoroafor's research integrates geochemistry, geomechanics, and reservoir engineering to improve understanding of fluid-rock interactions in subsurface technologies. Her work enhances hydrogen storage efficiency, optimizes geothermal reservoir performance, and improves CO2 storage security.
Researchers found evidence of biological material in desert rocks, suggesting the presence of microorganisms that can survive without light. The discovery has sparked interest in the global carbon cycle and its potential impact on climate change.
Researchers have presented a unique time-dependent record of drainage divide migration rates, showing that episodes of rapid shift coincide with past climate changes in the Negev over the last 230,000 years. This discovery accelerates our understanding of how climate affects the Earth's surface.
Researchers from Curtin University and Geological Survey of Western Australia have discovered the world's oldest known impact crater, dating back to 3.5 billion years ago. The discovery was made in the Pilbara region of Western Australia and provides new insights into the origins of life on Earth.
Researchers at the University of Tokyo have developed a new optical photothermal infrared spectroscopy method to detect microbial cells in ancient rocks, analogous to those found on Mars. The study strengthens Mars sample return protocols by providing a reliable way to assess the presence or absence of life in samples.
Hungarian researchers have identified unique bacterial communities in thermal waters that may help unravel the development of stromatolites, one of Earth's oldest rock formations. The findings provide valuable insights into biological and geological processes occurring in extreme environments today.
Researchers found that foliated rocks along a fault line exhibit anisotropic properties, causing uneven strength and contributing equally to earthquake generation. This discovery suggests that the properties of rocks may play a significant role in seismic activity.
Researchers from Tohoku University have improved a Mars climate model to account for the planet's non-uniform regolith properties. The enhanced model shows that highly absorptive regolith in mid- and low latitudes retains substantial amounts of absorbed water, which remains on the surface as stable adsorbed water.
Research team finds that heavy Mg isotopic signatures in volcanic rocks can be explained by partial melting of serpentinite-dominated mélanges. The study proposes a novel model involving diapiric rise and melting of these mélanges, which aligns with geochemical characteristics of arc magmas.
A team of scientists found that Earth's current ice-covered state is not typical for the planet's history and was only achieved through a lucky coincidence. The researchers concluded that no single process could drive these cold climates, and that multiple processes working together were necessary.
A recent study by University of New Hampshire researchers explores how to standardize rock climbing route difficulty through machine learning techniques, aiming to promote inclusivity and accuracy. The most successful approach used route-centric natural language processing methods, achieving an accuracy of 84.7%.
A research team developed an autonomous geological assessment tool that uses machine learning to measure dip angles and directions in rock facets with high accuracy, achieving rates of up to 99.4%. The R-C-D-F method eliminates joint bands while preserving joint embedment points, making it ideal for modern infrastructure projects.
Researchers at Harvard University used photochemical modeling to simulate how ancient Mars' climate was affected by atmospheric chemistry and crustal hydration. They found that episodic warm spells were driven by crustal hydration, leading to the buildup of hydrogen in the atmosphere.
Researchers have developed a sustainable alternative to traditional fertilizer production by harnessing the Earth's natural heat and forces to cook up ammonia. The new recipe uses iron-rich rocks and nitrogen-laced water, producing about 1.8 kg of ammonia per ton of olivine, with no energy input or CO2 emission.
A series of small earthquakes in Surrey in 2018 and 2019 may have been triggered by oil extraction from a nearby well, according to a new study. The research used mathematical modeling to predict the frequency of earthquakes based on oil extraction timing and volume, finding a rough match with observed seismic activity.
A 35,000-year-old ritual complex in the Manot Cave offers insight into the spiritual practices of Paleolithic hunter-gatherer groups. The discovery reveals evidence of human-made engravings, ash remains from fire, and acoustic tests that suggest a unique auditory experience for communal activities.
A new detection method has been used to identify over 100 small asteroids in the main asteroid belt, ranging from bus-sized to stadium-wide. This breakthrough could aid in tracking potential asteroid impactors and provide insights into meteorite origins.
A study by USC Dornsife scientists used satellite imagery, digital models, and field data to analyze the June 2021 Melamchi flood's triggers. The research found that heavy monsoon rainfall combined with excessive snowmelt overwhelmed river systems, causing catastrophic flooding.
The study discovered significant alterations in the region's state of stress and deformation following the 1975 Kalapana earthquake. The researchers found that Kīlauea's south flank experienced greater displacement prior to the earthquake, pointing to changes in mechanical properties influencing seismic activity.
Researchers propose that small black holes born in the early universe could have left behind hollow planetoids and microscopic tunnels, potentially detectable with telescopes or by monitoring old materials. The study suggests a low probability of primordial black hole passage but emphasizes the potential for discovery.
Researchers at University of Maryland have discovered that the South Pole-Aitken basin, the moon's oldest and largest visible crater, is more circular than previously believed. The team used high-resolution data to analyze mountain formations around the basin, revealing a rounder shape indicating a more vertical impact angle.
A team of physicists studied the unique motion of Champati seeds rolling down slopes, revealing a spread-out, then collapse-like behavior akin to rock avalanches. The research may provide valuable insights into geological flows and contribute to resolving challenges in this area.
Researchers at Cornell University have developed a library of basalt-based spectral signatures to help identify the presence of water on exoplanets. By analyzing small spectral differences between basalt samples, scientists can determine if an exoplanet once had running surface water or water in its interior.
A magnitude 4.8 earthquake in New Jersey triggered widespread alarm, but surprisingly, the epicenter showed minimal damage, while distant areas like NYC and Virginia experienced stronger shaking. An analysis of Lg waves revealed a previously unmapped fault with complex strike-slip motion and thrust, affecting regional hazard assessments.
Researchers have confirmed that fractures can form in superhot, superdeep rock, making it more permeable and potentially increasing its economic value. This breakthrough could lead to the development of cleaner, more efficient geothermal energy sources.
Researchers have long believed that rock friction follows a simple relationship with temperature, but a new study published in PNAS suggests otherwise. The study reveals that different underlying mechanisms affect the frictional resistance of faults, which could improve earthquake hazard assessments and forecasts.
The painting in the La Belle France cave is believed to be the world's oldest known piece of paleo-art depicting an extinct mammal-like reptile called a dicynodont. The San people were engaging in palaeontology long before Western scientists, and their artwork provides compelling evidence of this.
Astronomers have reduced concerns about a potentially hazardous asteroid swarm near Earth after discovering fewer large space rocks than previously thought. The study found only a handful of asteroids, likely less than 14, that fit the large size class, suggesting a smaller parent object and reducing the risk of extinction-level events.
Scientists have found that the Pinnacles in Western Australia were formed about 100,000 years ago during a wet period, distinct from the current Mediterranean climate. The iron-rich nodules trapped helium from radioactive decay, providing a precise record of their formation.
Researchers from Göttingen University identified the low crystallisation temperatures and groundwater origin of amethyst geodes in northern Uruguay. The study proposes a new model explaining their formation, which could improve exploration techniques and lead to sustainable mining strategies.
A new study finds that a nearby eroding river gorge is causing Mount Everest's peak to rise by 15-50 meters over the past 89,000 years. The research suggests that the loss of landmass due to erosion is causing the mountain to spring upwards by as much as 2 millimeters a year.
A study published in PLOS ONE suggests that South African rock art from the 19th century may be inspired by an extinct species of tusked animal called a dicynodont. The artwork, created by the San people, features a long-bodied animal with downward-turned tusks that is comparable to fossilized remains found in the region.
A new study provides a complete picture of the last Snowball Earth's end and suggests its connection to the emergence of complex lifeforms. The research focuses on ancient rocks known as cap carbonates, which preserve clues about Earth's atmosphere and oceans.
Researchers suggest that if most dark matter is composed of microscopic primordial black holes, they should pass through the solar system at least once per decade, introducing a wobble into Mars' orbit. This detection could lend support to the idea that primordial black holes are a primary source of dark matter.
Researchers at Boston University discovered that deep-sea rocks, called polymetallic nodules, produce oxygen through a process known as seawater electrolysis. This phenomenon creates 'dark oxygen' without sunlight, contradicting the long-held assumption that oxygen is only produced by plants and organisms with photosynthetic capabilities.
A team of sedimentologists and stratigraphers found that gap regularity, not incompleteness, determines evolutionary history reconstruction. Incompleteness can be overcome with geological knowledge, enabling accurate reconstruction of evolution hundreds of millions of years ago.
A rock formation spanning Ireland and Scotland has been confirmed as a rare record of the 'snowball Earth' period, when the globe was covered in ice. The Port Askaig Formation, composed of layers up to 1.1km thick, dates back to 662-720 million years ago during the Sturtian glaciation.
Researchers found the stone's age and chemical composition matched rocks from northeast Scotland, differentiating it from Welsh bedrock. The discovery suggests a high level of societal organization and implies long-distance trade networks along the British coast.
An international team has recovered a nearly continuous 1,268-metre-long section of rocks that originated in the Earth's mantle, providing insights into the role of the mantle in the origins of life on Earth, volcanic activity, and global cycles. The study also reveals new information about how magma is formed and feeds volcanoes.
Researchers analyzed rocks collected from seafloor, finding they date back to at least 2.5 billion years ago and have retained a stable oxidation state since then. The discovery provides new evidence on Earth's geologic history and sheds light on the planet's evolution.
Researchers developed a new method to study rock engravings, integrating technological and visual analysis to uncover the cultural significance of engravings in Timna Park. The approach provides comprehensive insights into the production processes and cultural context of ancient engraving practices.
A new study suggests that using special fertilizers and crushed basalt rocks can reduce agricultural nitrous oxide emissions without harming the ozone layer. The research found a 25% reduction in N2O emissions, aligning with efforts to reach net-zero emissions while supporting increased food production.
Archaeologists have uncovered evidence of early plant farming in east Africa, revealing a pattern of gradual introductions of different crops that originated from different parts of the continent. The study found domesticated cowpea, sorghum, and finger millet seeds dating back to around 2,300 years ago.
A study published in Frontiers in Fungal Biology reveals that microcolonial fungi and lichens on petroglyphs in the Negev desert can cause gradual erosion and damage. The researchers identified multiple species of these fungi and lichens, which are known to thrive in hot and cold deserts.
Researchers uncover dark particles and lighter components with stones, suggesting asteroids played a key role in delivering water and life to Earth. The samples also contain unexpected minerals, offering insights into Bennu's evolution and the early solar system.
Researchers used modern technology to estimate the number of rock gardens on Easter Island and food production, revealing that the island couldn't sustain a large population. The study's findings contradict the long-held notion of an ecological catastrophe and instead suggest a more sustainable approach to agriculture.
Researchers have developed a computer model that sheds light on extracting renewable energy from superhot, super deep rock. The model shows the formation of microscopic cracks creating a dense 'cloud of permeability' throughout the affected rock, which can lead to higher power delivery and efficiency.