Articles tagged with Physical Geology
A research team from the University of Göttingen investigated the influence of the Zagros Mountains on Earth's surface bending. They found that the Neotethys oceanic plate is breaking off horizontally, creating a depression in the region.
Two large 'islands' with the size of a continent have been found in the Earth's mantle, showing they are at least half a billion years old. Seismologists discovered these regions by studying the tones and sound volume of seismic waves, finding little damping in the islands, but high damping in nearby cold slab graveyard.
Researchers from Göttingen University and Max Planck Institute for Solar System Research discovered the Moon formed from material ejected from the Earth's mantle. The findings support the idea that water reached Earth early in its development, contrary to the prevailing assumption of late impacts.
Scientists discovered that gophers, which were introduced to a devastated area after the 1980 eruption, helped regenerate plant and animal life through their digging. The bacteria and fungi they brought to the surface helped plants establish themselves and survive.
The SUPERSLUG initiative aims to forecast the impact of sediment slugs on river catchments and communities. The project will use a range of sensors and numerical models to provide comprehensive predictions of where and how long-term effects might be felt, up to decades or centuries after an event.
Researchers found inorganic nanostructures surrounding deep-ocean hydrothermal vents that mimic molecules essential for life. These structures can harness energy and convert it into electricity, sparking interest in applying this technology to industrial blue-energy harvesting.
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 questioned the Cascadia subduction zone's earthquake record, finding that turbidite layers showed no better correlation than random chance. The study suggests a need for further research on turbidite layers and their connection to past earthquakes.
Researchers investigate the effect of oxygen content on mantle rock melting and early Earth magma ocean formation. The study reveals that oxygen fugacity significantly influences melting temperatures, suggesting current models need revision.
Researchers found that powerful waves triggered deep within the Earth can cause continental surfaces to rise by over a kilometre. The study explains why parts of continents experience substantial uplift and erosion, forming sweeping elevated regions known as plateaus.
Scientists have developed a state-of-the-art computational model predicting land, ice and global sea-level interactions. The model estimates that reducing greenhouse gas emissions could slow melting Antarctic ice enough to allow Earth uplift to partially stabilize the ice sheet and prevent some future sea-level rise.
A new junior professorship in Earth System Science at Mainz University, sponsored by the Volkswagen Foundation, will establish a specialized lab for paleoclimate research. The lab will analyze high-resolution sediments formed thousands to millions of years ago to reconstruct past climates, including seasonal patterns.
A new imaging technique allows scientists to visualize the Earth's rocky interior using GPS data, revealing details about the planet's crust and mantle. This method has the potential to improve earthquake predictions by combining it with other techniques.
A recent study has identified over 300 distinct types of bacteria in Roman Baths water, including those with antibiotic-producing capabilities. These microorganisms show promise as a potential source of novel natural products to combat antibiotic resistance.
The 2023 Geothermal Rising Conference highlights growing interest in superhot rock geothermal, with papers validating its viability for high power output and small spatial footprint. Researchers are developing new technologies to access these resources, including millimeter wave energy to drill deeper holes.
Researchers analyzed dolomite rocks and found a high proportion of C-13, indicating strong methane formation by microorganisms in water with low sulphate content. The sediment's chemical development is controlled by crater floor cooling and water supply, not climatic changes.
A scientific model published in Nature shows a striking correlation between landscape dynamics and the evolution of life on Earth. The study proposes that sediment pulses controlled by past landscapes have played a key role in shaping biodiversity.
Researchers separate out microbial and environmental controls on marine sedimentary pyrite sulfur isotope ratios, revealing local processes that dominate the record. This breakthrough refutes previous hypotheses and offers a new framework for interpreting ancient signals.
Researchers propose that ancient planet Theia collided with Earth billions of years ago, forming two continent-sized blobs of unusual material and the Moon. The blobs, known as large low-velocity provinces (LLVPs), are rich in iron and likely composed of different proportions of elements than the mantle surrounding them.
A new study by the University of Oxford found that ancient carbon in rocks can release significant amounts of CO2 into the atmosphere, rivaling volcanic emissions. This discovery challenges current understanding of the natural carbon cycle and has important implications for climate change modeling.
University of Queensland researchers have developed a new technique using laser ablation inductively coupled plasma quadruple mass spectrometry to analyze the chemical composition of magma. This high-resolution method provides clearer data on the eruption style and lava flow, enabling better forecasting of volcanic eruptions.
A study from Smithsonian researchers deepens understanding of Earth's crust by testing and eliminating the garnet hypothesis about why continental crust is lower in iron and more oxidized. The findings suggest that intense heat and pressure cannot produce the necessary conditions for garnet formation, contradicting a popular explanation.
A team of researchers from UNLV has named a previously unexplored 500 million-year-old Grand Canyon formation, the Frenchman Mountain Dolostone. The new formation was identified through scientific detective work and is now understood to have been deposited over an interval of 7.3 million years during the Cambrian Period.
Researchers used a novel method to study tectonic plate movement, finding two significant slowdowns in the South American plate over the past 15 million years. These events may have contributed to the widening of the Andes mountain range by causing unstable material to tear free and sink into the mantle.
Researchers at Pusan National University have created a new algorithm that can accurately predict ice resistance and fracture points for ships navigating through the Arctic shipping routes. The model uses an elastic material approach, allowing it to study continuous ice-breaking processes, which is essential for efficient navigation.
A research team uncovered a specific kill mechanism responsible for several biotic disruptions during the late Devonian Period. The discovery linked sea level changes, climate fluctuations, and ocean chemistry to mass extinctions, with implications for today's oceans affected by global warming.
A detailed and dynamic model of the Earth's surface over the past 100 million years provides a high-resolution understanding of its creation and sediment flow to oceans. The model will help scientists predict future changes and understand ocean chemistry.
Researchers use heavy hydraulic presses to mimic early Earth's conditions and recreate the differentiation process in miniature. They found that iron melts could pass through grain boundaries, exchanging chemical elements like oxygen and sulfur with the surrounding mantle.
Researchers have discovered a new layer of partly molten rock under the Earth's crust that helps settle a long-standing debate about how tectonic plates move. The study reveals that the melt layer has no significant influence on plate tectonics, with convection of heat and rock being the prevailing force.
A new study suggests that massive volcanic eruptions were the primary cause of mass extinctions, including the one that wiped out the dinosaurs. The research found a strong temporal connection between flood basalt eruptions and significant climatic events.
A team of researchers from ETH Zurich and WSL reconstructed the topography of all Swiss glaciers in 1931 using stereophotogrammetry. They found that the glacier volume halved between 1931 and 2016, with some glaciers losing mass at varying rates depending on factors like altitude, snout shape, and debris coverage.
A new study from the University of Washington and the National Park Service measured 38 years of change for glaciers in Kenai Fjords National Park. The study found that 13 of 19 glaciers have shown significant retreat, while two have advanced. Lake-terminating glaciers are retreating at a faster rate than other types.
Researchers at Mainz University found the Cumbre Vieja lava to be exceptionally low in viscosity, resulting in rapid flow and devastating damage. The study published in Nature Communications revealed that the lava's composition, particularly its silica content, contributed to its fluidity.
Researchers at UT Austin discovered a rule connecting channel belts to river patterns, finding that channels in ancient rivers lead to narrower belts. Multichannel rivers take up more space on the belt and are closer to the floodplain, influencing landscape shaping.
Researchers have taken a detailed image of an unusual pocket of rock at the boundary layer with Earth's core, revealing complex internal variability. The discovery supports existing proposals that the zone contains more iron than surrounding rocks, potentially linking it to ancient rocks or unknown core leakage.
A massive volcanic eruption at the end of the Triassic period caused a global cooling effect, leading to the mass extinction. The event paved the way for the rise of dinosaurs as their natural predators went extinct.
Researchers estimate 60,000-year timeline of massive volcanic eruptions, finding 85 large global eruptions and 69 larger than the 1815 Mount Tambora eruption. This new data helps improve climate models by providing insights into Earth's climate sensitivity.
A new study led by Smithsonian volcanologist Dan Rasmussen finds that water content in magma is a significant factor controlling its storage depth. The research provides crucial insights into the physics of magma storage beneath volcanoes, which can aid in predicting volcanic eruptions.
Researchers propose new dynamic model suggesting thermal energy causes continental plates to drift, but the main driving force is supplied by a gravitational slip of the continental crust and hot mantle upwelling. This model explains why the opening of the Atlantic Ocean is wider in the south than in the middle.
For the first time, astronauts in orbit successfully controlled a robot on the ground using haptic feedback, simulating geological exploration missions. This breakthrough enables more complex investigations of planetary surfaces without human exposure to danger.
A new 'Goldilocks Zone' has been discovered in the Earth's crust, allowing critical metals like gold, copper, and tellurium to pass upwards. This finding sheds light on planetary cycles of metals and could enable more targeted mineral exploration, reducing environmental impact.
Researchers found that glaciers in the Northern Hemisphere lost a total area of 390 km² per year, with 60% attributed to the Greenland Ice Sheet. Only 3% of glaciers advanced during this period. The study highlights the impact of climate change on marine-terminating glaciers.
Scientists have proposed a new model for the Moon's crust formation, suggesting that a 'slushy' magma ocean played a key role. The research suggests that crystals remained suspended in liquid magma over hundreds of millions of years, eventually forming the lunar crust.
A new study analyzing the rock record rules out atmospheric oxygen before the Great Oxygenation Event, potentially rewriting our understanding of Earth's past. The research team used high-resolution techniques to inspect specimens of the rock, finding evidence that chemical data suggesting early oxygen may have been introduced later.
A recent study found that earthquakes and extreme rainfall lead to a significant increase in landslide rates in Nepal during the monsoon season. The research, published in Nature Communications, reveals that landscape damage caused by the April 2015 Gorkha earthquake increased landslide risk by six times.
A new study presents a broad survey of monogenetic volcanoes in the US Southwest, providing insights into their characteristics and potential hazards. The research reveals that over 1,800 volcanoes have erupted in the region over the past 2.58 million years, with some still posing threats despite being dormant.
Researchers discovered that ice needles growing on frozen ground can push up rocks into regular patterns through a combination of experiments and computer modeling. Over time, stones cluster together, leaving bare patches stone-free, as the size of the stones, soil moisture, and ice needle growth interact.
Researchers found that lake breach floods played a crucial role in shaping the Martian surface, creating river valleys with nearly a quarter of the Red Planet's total volume. The study's findings suggest that these floods had a lasting impact on the surrounding landscape, influencing the formation of other nearby river valleys.