Researchers Victoria Hudspith and Claire Belcher found that different types of plants burned at varying temperatures and that certain flower shapes made them more likely to be destroyed by fire. This discovery affects the interpretation of charred flowers as a source of information about ancient flowering plants.
Soil column thickness significantly influences the transition from hillslopes to channels. Climate plays a crucial role in triggering arroyos exclusively found in south-flowing catchments. These findings highlight the importance of soil development in shaping erosion instabilities.
The High Plains aquifer is a critical water source for US agriculture, but its long-term viability is threatened by diminishing groundwater levels. The authors argue that good management practices can extend the aquifer's lifespan, but require collective effort and cooperation across disciplines and political divides.
Researchers have mapped areas with high rare earth mineral resource potential within heavy mineral sands in the southeastern United States. The study suggests that a large percentage of these minerals are derived from specific Piedmont province rocks via coastal processes during Atlantic opening.
A field campaign on Ellef Ringnes Island revealed over 130 methane seep mounds in Cretaceous age sediments, indicating a significant release of methane during climate warming. The discovery supports concerns of potential destabilization of modern methane hydrates and has important implications for the Arctic Ocean's warming.
A study of the 1755 Lisbon earthquake reveals a lack of knowledge among Portuguese citizens about tsunamis, yet most recognize the importance of learning more. The authors advocate for including historical and scientific issues in geosciences programs to address seismic risks and responses.
Scientists drilled three 2-km-deep holes to explore the geology of a scientific borehole in the Snake River Plain. They found evidence of heat and older hydrothermal interactions, but no geothermal energy production due to a cool water aquifer.
A team of experts presents exceptional photographs documenting the loss of ice across Earth's surface. The images showcase the devastating effects of climate change on glaciers, a consequence of anthropogenic carbon emissions. GSA Today article highlights the urgent need for action to address this issue.
A study by Colorado State University researchers found that an extreme flooding event in 2013 eroded over 500,000 cubic meters of sediment, equivalent to 115 years of weathering products. The flood also discharged large amounts of organic carbon and wood into reservoirs, affecting water storage capacity.
A team of European paleontologists challenged the fundamentals of echinoderm evolution by discovering that some ancient groups survived the end-Paleozoic extinction. The findings revealed that these surviving echinoderms coexisted with modern sea urchins and brittle stars, stretching across various paleo-environments by the late Triassic.
The Nile Delta, a vital breadbasket for Egypt, is at risk of serious water scarcity due to human activities and the upcoming completion of Ethiopia's Grand Ethiopian Renaissance Dam. The delta's soil-rich areas are being eroded by Mediterranean coastal currents and experiencing compaction, leading to subsidence and sea-level rise.
Researchers analyzed Lake Towuti sediment using visible-near infrared spectroscopy and found distinct variations in clay mineralogy over the past 40,000 years. This technique can help reconstruct ancient Martian climate history.
Researchers have discovered the first occurrence of in situ preserved trilobite eggs from the Lorraine Group in upstate New York. The eggs are spherical to elliptical in shape and nearly 200 micrometers in size, providing valuable insights into the reproductive biology of ancient arthropods.
Research reveals large-scale thaw-induced slope disturbances and mobilization of primary glacial sediments, leading to cascading effects on fluvial, lacustrine, and coastal systems. The study's findings have major implications for predicting northern landscape change and downstream impacts.
Scientists discover Quaternary ruptures along the Leech River fault, capable of producing earthquakes MW >6, highlighting seismic risk exposure. A new continent, Zealandia, geologically separate from Australia and Antarctica, is identified as a major geological entity.
Researchers have recovered over 100 billion micrometeorites from urban areas, including Norway, and found that the majority are cosmic spherules, representing the youngest large MMs yet recovered. This study challenges the long-held belief that these particles can only be found in pristine environments.
Scientists propose a novel plate tectonic scenario for the genesis of major Mesozoic oil fields. The model suggests that rapid continental movement and changes in latitude could have led to the emplacement of organic carbon at equatorial latitudes, eventually sealing it with sediments deposited at sub-tropical latitudes.
Researchers have found fossilized whale skeletons in the Ica Desert of Peru, providing insights into the Miocene whale feeding habits. The discovery also reveals exceptional microstructure preservation, allowing for the study of fossilized baleen bristles at a submillimetric scale.
Scientists have overturned traditional interpretations of the Susitna basin in Alaska, discovering that it was formed by a southwest-dipping thrust fault. This finding changes our understanding of the region's geologic evolution and the formation of iconic landmarks like Mount Susitna.
New fossil discoveries from the Ediacaran Doushantuo formation in South China reveal embryonic features similar to those of living animals. The fossils display unique structures preserved through discoidal cleavage, supporting the conclusion that animal lineages evolved by the mid-Ediacaran period.
The use of virtual rocks can archive samples for destructive testing, aid peer-review, and provide access to geological materials for disabled students. Virtual explorers can also enhance learning and retention after field trips.
The August issue of Lithosphere presents papers on Tyrrhenian margin neotectonics in Italy, the Wrangellia composite terrane in Canada, and fault-related fissures in Wales. These studies provide new insights into Quaternary travertine deposits, thermochronology data, and paleofluid circulation in faults.
Researchers used electron backscatter diffraction to unravel the transformations involved in creating granular zircon. The results show that making granular zircon first involves forming twins and transforming into reidite under extreme pressure and temperature conditions.
Researchers directly measure real-time rock cracking and model sun-driven thermal stresses. They conclude that slow cracking by daily solar forces represents the majority of rock breakdown over deep geologic time. Rare events like freezing contribute to rapid crack growth, but only briefly surpassing the 'tortoise' effect.
Researchers measured oxygen content in ancient atmosphere trapped in halite (rock salt) and found it to be a key component in determining the origin and evolution of higher life forms. The discovery has applications beyond origins of life, including tracking atmospheric changes and finding economic metal deposits.
Two new Geosphere articles reveal the geological history of a major ignimbrite flare-up in the Central Andes, providing insights into the formation of geothermal energy resources. Researchers also study a distinct style of arc volcanism linked to slab-rollback and its impact on continental margins.
The 1815 UK geologic map, created by William Smith, is still remarkably accurate two centuries later due to its innovative features. The map's accuracy can be attributed to a combination of creative individuality, technological advancements, and favorable taxation laws.
The July 2016 issue of Geology features studies on pre-Mississippian tectonic affinity across the Canada Basin-Arctic margins, as well as hydrothermal alteration of seafloor peridotites. Researchers also investigate recent volcanic resurfacing of Venusian craters and cyanobacterial fossilization in Ediacaran siliciclastic environments.
Scientists analyze sedimentary archives in Alberta Foreland Basin, revealing cyclic changes in sediment source areas consistent with magmatic flare-ups. In another study, researchers uncover pre-Cenozoic geologic history of the central and northern Tibetan Plateau, tying Wilson cycles to constructing the Tethyan orogenic system.
Researchers from Trinity College and Swedish Museum of Natural History found zircon crystals formed in younger impact craters are indistinguishable from ancient ones, suggesting many ancient crystals formed in violent impact settings. This challenges the long-held theory that these crystals formed during tectonic plate collisions.
Researchers discover microbes creating tubular microtunnels in basaltic volcanic glass on Earth, expanding our understanding of subsurface microbial activity. This finding also suggests that similar features may exist on Mars, potentially near the surface, which could aid future Mars missions.
The taste of wine is influenced by soil properties, particularly pH, which modify the wine's chemistry. Researchers found a correlation between specific soil characteristics and Pinot Noir vintages in the Willamette Valley.
Researchers propose an algorithm to retrieve four-dimensional surface deformation field using space-borne SAR data, crucial for interpreting complex geological phenomena. The method demonstrates its validity in areas where large and/or rapid surface deformation occurs, such as the Afar depression system.
Researchers study coastal uplift and erosion in Northern California, discovering rivers cut down hillslopes, triggering landslides that balance uplift. Landslides also deliver resistant rocks to rivers, delaying erosion, with implications for landscape evolution and hazards like landslides.
Geologists explore how various rock types, particularly carbonates, influenced Union and Confederate commander's decisions. The rolling terrain of Gettysburg and other battlefields was limited by carbonate rocks, which provided natural defensive positions.
Researchers have uncovered evidence of 12 massive explosive eruptions in the Cassia Hills of southern Idaho, which left behind glassy deposits and a deep volcanic basin. These eruptions were hotter and more frequent than those at Yellowstone, and provide insights into ancient volcanic activity west of the famous park.
Researchers have found that the flux of organic matter to the seafloor was reduced for a shorter time than previously thought, with evidence suggesting that some food must have reached the seabed despite mass extinctions. The study used foraminiferal isotopes from a deep-sea core in the South Atlantic to investigate this paradox.
A 54.5 million cubic meter snow avalanche occurred in western Colorado, killing three people. The study used large-scale field mapping and seismic signals to analyze the avalanche's movement phases, shedding light on rock-avalanche modeling and ongoing hazards.
Researchers investigate the formation of a tiny volcanic island near Nishinoshima volcano, Ogasawara Islands, Japan. The island's unique lava flows and internal pathways provide valuable insights into the geological processes that shape our planet.
The interaction of water and magma can dramatically increase the explosivity of a volcanic eruption, producing billowing clouds that deposit tephra as fine-grained ash within 10 km of the vent area. The study of the 2008 Okmok eruption in Alaska provides insights into water-magma interactions and their impact on eruption parameters.
Researchers propose a new conceptual model for monogenetic eruptions, suggesting seismic crises occur before eruption and magmatic intrusions play a key role. This framework could improve forecasting of these events in populated areas, reducing economic and societal impact.
Researchers evaluated the performance of Riegl Z620i and LPM-800HA terrestrial laser scanners on characterizing natural surfaces. They established a procedure to test componential uncertainty budgets and demonstrated the relationship between reference network uncertainty and imaged surface repeatability.
The 2014-2015 Pahoa lava flow crisis at Kilauea Volcano posed significant societal impact despite low effusion rates, highlighting the need for effective communication and public education during volcanic events. The crisis provided valuable lessons about predicting and mitigating lava flow hazards.
Scientists Matthew Tarling and Christina Rowe used dry lentils to explore the formation of 'scaly fabrics' found at the base of landslides, faults, and glacier beds. The lentils exhibited a tendency to shift constantly against each other when shearing, prohibiting long-lasting fault development.
A new study shows that Aboriginal burning practices in Australia had a minimal effect on the erosion of their inhabited landscapes. The researchers used beryllium-10 to model the impact of fire on landscape erosion and found that it was not intense enough to change the natural rate of erosion over thousands of years.
Researchers present a novel method to analyze apatite inclusions in magmatic zircon and titanite, allowing estimation of whole-rock Sr and SiO2 concentrations. This technique provides insight into petrogenesis and provenance, enabling better understanding of the continental crust's evolution.
The 2011 flood caused by Tropical Storm Lee had a significant impact on the geomorphology of several large watersheds in north-central Pennsylvania. Channel widening and bank erosion were common, and huge volumes of gravel were transported during the flood. The study suggests that part of the reason for these changes was related to the...
A 140-meter long sediment core from the Caribbean Sea has uncovered evidence of a massive 2.4 million-year-old volcanic eruption, which was likely larger than any recorded event in the region. The discovery provides valuable insights into past volcanic activity and its potential impact on future eruptions.
Fault slip during the 2005 Sumatra earthquake was stopped by the topography on the downgoing plate, with a 3-km high region strengthening the plate boundary and preventing rupture propagation. This finding is supported by seismic reflection data that mapped the shape of the downgoing plate across a long-lived segment boundary.
New mapping and dating reveal timing of past earthquakes and tectonic deformation distribution across the western U.S. Death Valley's faulted alluvial fans help determine seismic hazard mitigation and understand great landscapes' evolution over recent geologic time.