Articles tagged with Rocks
Scientists have discovered a layer of fluid rock at the bottom of the upper mantle, which may explain some observed phenomena in seismology. The discovery was made by analyzing data from GPS sensors on islands after a deep earthquake in the Pacific Ocean.
A Flinders University-led research team will explore Aboriginal cultural heritage sites in Limmen National Park using $800,000 ARC Linkage Funding. The project combines archaeological and anthropological data to understand Marra cultural history and inform the management of sensitive cultural heritage sites.
A 550-million-year-old fossil of Dickinsonia was discovered in India, but it turned out to be a beehive. The correction puts the geologic and life history of India back into contention, with the rocks potentially being one billion years old.
A KAUST research team studied the interaction between nitrogen gas and hydrocarbons in oil reservoirs. They found a direct correlation between nitrogen solubility and oil swelling, enhancing oil recovery. The study also sheds light on CO2 storage with impurities like methane and nitrogen.
Scientists from the University of Arizona have discovered a giant active mantle plume pushing the surface of Mars upward, causing earthquakes and volcanic eruptions. The finding suggests that Mars' deceptively quiet surface may hide a more tumultuous interior than previously thought.
A new study models likely future cliff retreat rates of two rock coasts in the UK, finding that rock coasts are likely to retreat at a rate not seen for 3,000-5,000 years. The researchers predict that rock coast cliffs will retreat by at least 10-22 meters inland due to accelerating sea level rise.
A new Harvard-led study has found evidence of early plate tectonics and the flipping of Earth's magnetic poles, which may have created a more conducive environment for life. The research suggests that the planet's surface was moving at a rate of 6.1 centimeters per year, consistent with modern plate tectonics.
Researchers from UC Berkeley used rock analysis to determine that the valley's impressive depth was formed since 10 million years ago, with most of it carved in the past 5 million years. The study employed a novel technique called helium-4/helium-3 thermochronometry to reconstruct the temperature history of the rocks.
A team of researchers led by Goethe University Frankfurt analyzed a diamond from Botswana, revealing significant amounts of water stored in the transition zone. The discovery has far-reaching consequences for the dynamic situation inside the Earth, potentially altering global material circulation.
Researchers uncovered a unique story behind Marra Wonga rock art site, featuring animal tracks, lines, grooves, and hand-related stencils. The site's composition appears to be linked to the Seven Sisters Dreaming story, with designs spread across the length in a particular order.
Researchers identified favorable reservoir-forming conditions and modes in the Ordovician buried hills of the Jizhong depression. The study found that three sets of source rocks from the Carboniferous-Permian and Paleogene geologic periods provide adequate quantities of hydrocarbons required for oil and gas reserves.
Researchers found compact fragments in the Aguas Zarcas meteorite that wouldn't break apart, leading to CT scans revealing deformed rocks with the same orientation. The team proposed a hypothesis that asteroids 'spit out' pebbles due to high-speed collisions and thermal cycling, which can cause rock brittleness.
Research on asteroid 2008 TC3 reveals that larger meteorites survived to the ground, contradicting previous assumptions about interior shielding. The study's findings provide new insights into asteroid fragmentation and the origins of space rocks.
Researchers found that the asteroid is similar to 'Ivuna-type carbonaceous chondrites,' which date back to the solar system's beginnings. The samples show signs of having been soaked in water, but the rock itself appears relatively dry, hinting at similar formation conditions between comets and asteroids.
A study published in PLOS ONE reveals Cueva de Ardales was a canvas for artwork and burial place for Neanderthals and modern humans from 65,000 to 35,000 years ago. The site provides a unique history of human activity in Spain and sheds light on the development of European culture.
A joint research team has discovered ancient continental rocks at the Southwest Indian Ridge, dating back 2.7 billion years. The rocks' composition suggests they were recycled from the neighboring African continent through the asthenosphere, challenging current understanding of oceanic crust formation.
Researchers found that some magmas originate from mantle portions with early crust remnants, suggesting a 'graveyard' of old material survived for billions of years. This discovery sheds light on the formation of large continents and the evolution of Earth's atmosphere.
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.
Scientists have developed a new toolkit to aid in the discovery of porphyry-type copper deposits, crucial for green technologies. The study provides a textural framework for exploration geologists to assess deposit architecture before employing more invasive techniques.
The Bushveld Complex functioned as a gigantic magma body, with a column of melt likely several km thick, contradicting the prevailing theory of non-existent large, long-lived and largely molten magma chambers. This discovery was made possible by 3D high-resolution X-ray computed tomography studies of chromitite.
Researchers found variations in carbon isotopes in younger kimberlites, suggesting the Cambrian Explosion affected the Earth's lower mantle. The study suggests that changes in marine sediments leave profound traces on the Earth's interior.
A recent seismic study reveals that Patagonia is rising as glaciers melt due to a gap in the tectonic plate under the region. The study found low seismic velocity and a thinning of the lithosphere above the gap, which is driving rapid uplift.
In a study published in PLOS ONE, researchers found that untrained captive orangutans can complete two major steps in making and using stone tools: striking rocks together and cutting using sharp stones. This suggests that the use of stone tools may have existed in our last common ancestor with orangutans 13 million years ago.
Scientists used a portable X-ray fluorescence device to date 12,000-year-old rock art in Idaho, Wyoming, and Montana. The analysis confirmed the age of petroglyphs created between 12,000-10,000 years ago with high accuracy.
Research reveals that magmas from Mount Etna and Mount Vulture have extremely high Nb/Ta ratios, indicating a deep carbon-rich lithospheric mantle beneath southern Italy. This process contributes significantly to global volcanic CO2 emissions.
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.
Limpets played a significant role in global culture, medicine, and innovation, with uses dating back tens of thousands of years. They have contributed to the evolution of human brain development and feature in many place names and traditions.
A research team has reconstructed the preglacial topography of North America's mid-continent, revealing how ice sheets reshaped the landscape and allowing researchers to understand rock erosion and deposition under ice. The findings also provide insights into water resources and availability in the region.
A new study published in Nature Communications reveals chemical heterogeneities in Apollo 17 sample troctolite 76535, indicating an early rapid cooling of the Moon. This finding challenges previous estimates of a 100-million-year cooling duration and supports initial rapid cooling of magmas within the lunar crust.
A new study suggests that clay minerals like smectite could store the missing water on Mars. Researchers found that iron-rich smectite can form at depths of up to 30 km, making it a potential reservoir for the planet's lost water.
A University of Liverpool study found that meteorite impacts are determined by the minerology of the rocks hit, not the size of the impact. The study analyzed 44 impacts and found that those hitting rocks rich in potassium feldspar always correspond with mass extinction episodes.
A new study from the University of Bath is shedding light on the behavior of saline solutions under extreme conditions, a crucial step towards carbon storage in deep-sea aquifers. The research uses neutron diffraction to examine the interaction between salt ions and water molecules at high pressures and temperatures.
A new study has found that serpentinite plays a crucial role in recycling oxygen in the Earth's tectonic plates. The research, led by Cornell University scientists, reveals that the oxidation state of the mantle is controlled by the subduction system's thermodynamic conditions and geometry.
A new study published in Communications Biology found a significant connection between visual gaze and motor skills learning, as participants learned to make stone tools through video training. The researchers discovered that the connection evolved over time, with certain phases of learning being more closely tied to gaze patterns.
The world's largest ammonite species, Parapuzosia seppenradensis, reached diameters of 1.5-1.8 meters around 80 million years ago. This evolution likely helped the species evade predation and survive in its environment.
A 1.5°C temperature increase affects algae and animal species living on UK coastlines, with significant changes in species abundance and breeding patterns. The study highlights the importance of considering local temperature variations when predicting climate change impacts.
Researchers discovered carbon residue in ancient ruby, indicating early life presence, and graphite changed surrounding rocks' chemistry for favourable conditions
Scientists have determined the age of the Chang'e-5 moon rocks to be approximately 1.97 billion years old, closing a 2-billion-year gap in lunar sample dating. This precision is crucial for calibrating chronology tools and studying the moon's volcanic history.
Researchers used extensive 2D and 3D broadband seismic reflection data to visualize and understand the subsurface structures of the Orphan Basin. The study provides context for future assessments of source rock, reservoir, and seal strata in oil and gas exploration.
Researchers at Lawrence Livermore National Laboratory calculated moment tensors for 130 underground nuclear and 10 chemical tests to aid explosion monitoring. The study's database of carefully documented explosions will be useful for researchers, allowing them to distinguish explosions from earthquakes and estimate yield.
Researchers found that dough mixing vats and millstones from Roman-era ruins were made from specific rock types that improved each tool's function. The stones were sourced locally, challenging a theory that some millstones were imported from Italy.
A University of Queensland-led study reveals that hot spot volcanoes do not produce 'pristine' magma from the melting mantle but instead filter a different melt to the surface. This new information supports the notion that detection of magma at the crust-mantle boundary could indicate an upcoming eruption.
Researchers found that trees are tapping into bedrock for water, a phenomenon previously thought to be rare. The study, led by Erica McCormick at UT Austin, suggests that bedrock is a significant source of water for trees, with rock moisture outdoing soil as a water source in many cases.
The study reconstructs the movement of southwest Japan from the Cretaceous to the Cenozoic era using paleomagnetic analysis. The researchers found that southwest Japan experienced two clockwise rotations, indicating tectonic rotations during the Paleogene and Neogene periods.
A University of Delaware study of ocean rocks has informed earthquake science by understanding the properties of underwater faults and their impact on seismic activity. Researchers have found that seawater infiltration in these faults weakens the rock, allowing it to flow faster and potentially reducing the risk of large earthquakes.
A database of 3,000 lead isotope analyses has been compiled for the Iberian Peninsula, providing a comprehensive resource for geological and archaeological research. The IBERLID database includes standardized data on minerals, rocks, and metallic objects, facilitating comparison and analysis.
Researchers have identified five new plant species in Bolivia's Bolivian Andes, expanding the genus Jacquemontia. The study highlights the importance of classifying and conserving these species, which are highly vulnerable to threats like invasive species and habitat destruction.
Researchers discovered microbial communities with the potential to consume methane, a greenhouse gas, at high rates in carbonate rocks from seven geologically diverse deep-sea methane seeps. The study found that these microorganisms can consume methane at rates up to 5,500 nanomoles per cubic centimeter per day.
A massive rock and ice avalanche in February 2021 killed over 200 people in Uttarakhand, India. The disaster was exacerbated by exceptional avalanche height, rock-to-ice ratio, and downstream hydroelectric infrastructure, underscoring the need for sustainable planning.
Researchers used synchrotron X-ray techniques to study how gypsum dehydrates under pressure, revealing a small nudge that can have big consequences for geological processes. The findings suggest that increased tectonic stress can speed up dehydration and promote earthquakes.
Researchers created a new map of the Schrödinger basin, a key area for understanding the moon's geological history. The map provides guidance for robotic rovers to collect high-priority rock samples from this region.
Researchers in Spain found rock humidity in dehesas can sustain vegetation during droughts by providing an alternative source of water. Soil moisture levels varied between slopes, with the north-facing slope having higher biomass and NDVI values, indicating improved plant growth due to increased water storage capacity.
New research suggests Himalayan rock glaciers, which account for 1/25 of glacial ice, will resist global warming more than traditional 'true' ice glaciers. These slow-moving glaciers are well-insulated and contain about 51 cubic kilometers of ice.
Scientists have identified an early indicator of magma viscosity that can be measured before a volcanic eruption, enabling them to forecast the potential danger. This discovery, published in Nature, could lead to more accurate assessments of volcano behavior and improved emergency response strategies.
Research found that restored streams have fewer large and stable rocks for insect egg-laying, delaying recovery. Insects rely on these rocks to quickly repopulate and maintain ecosystem health.
Scientists have discovered that the high silica content in ancient rocks formed in the Earth's mantle is linked to a significant change in the planet's interior around 2.5 billion years ago. This boundary may have been caused by changes in the mantle's flow, leading to the loss of extremely high temperatures.
A study found dinosaurs' dispersal coincides with a significant drop in atmospheric CO2 levels around 214 million years ago. This suggests prior climatic barriers prevented their expansion into the Northern Hemisphere for 15 million years.
Researchers from St Petersburg University have discovered a complex of rocks forming an ancient island arc in the Songkultau Mountains of Kyrgyzstan, dated to around 500 million years ago. The finding provides valuable insights into the geological history of Central Asia and has implications for understanding large ore deposits.
Researchers found evidence that thinning of the lithosphere is generating heat needed to initiate process of stabilizing continental crust. This challenges previous understanding of mountain building and suggests a new mechanism for continent stability.
Researchers have discovered natural nanodiamonds in oceanic rocks, confirming the formation of diamonds under low-pressure conditions. The discovery was made in Cuba's Moa-Baracoa Ophiolitic Massif and provides new insights into the geological processes that form these valuable gemstones.