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Search results for “Geology”

1,000+ results for "Geology"

Venus plots a comeback

Space agencies are turning their attention back to Venus, the closest planet to Earth, to learn more about its atmosphere and geology. Recent findings have generated renewed interest, and multiple missions are planned to study Venus' surface and atmospheric chemistry.

SourceAmerican Chemical Society·JournalChemical & Engineering News·DateMar 31, 2021

Mystery of Martian glaciers revealed

A new analysis reveals Mars underwent 6-20 separate ice ages during the past 300-800 million years, with rocks trapped in glaciers providing a natural experiment. The findings hold implications for planetary geology and space exploration, including the potential for life on Mars.

SourceColgate University·JournalProceedings of the National Academy of Sciences·DateJan 19, 2021

Gas pressure depletion and seismicity

A new study published in Geology has shed light on the mechanisms driving induced subsidence and seismicity in gas-producing sandstone reservoirs. Researchers analyzed drill core samples from the Groningen field, finding evidence of elastic strain plus inelastic compression of weak clay films within grain contacts.

SourceGeological Society of America·JournalGeology·DateJan 4, 2021

St Petersburg University scientists discover an ancient island arc in the Kyrgyz Tien Shan

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.

SourceSt. Petersburg State University·JournalGeoscience Frontiers·DateDec 31, 2020

Determining tectonic plate movement without fossil help

Researchers A.M. Celal Sengor and colleagues used geochemistry and structural geology to identify essential mountain-building processes in the Precambrian rock record. The Saharides' formation added 3-5 million km2 of material to the continents, providing a new method for reconstructing complex mountain formations.

SourceProceedings of the National Academy of Sciences·JournalProceedings of the National Academy of Sciences·DateDec 7, 2020

Evergreen needles act as air quality monitors

Researchers at the University of Utah found that measuring magnetic particles on evergreen needles can provide a high-resolution, year-round picture of air quality. The study correlated needle magnetism to general air quality, suggesting a new method for mapping particulate matter distributions at a high resolution and low cost.

SourceUniversity of Utah·JournalGeoHealth·DateSep 15, 2020

Fish fossils become buried treasure

Researchers discovered that ancient fish fossils near Japan hold valuable rare-earth elements, indicating potential new global supply sources. The findings suggest that fish populations were drawn to specific locations due to climate change and underwater geology, resulting in concentrated deposits of these metals.

SourceUniversity of Tokyo·JournalScientific Reports·DateJun 18, 2020

Strangely ordinary strata

Research reveals that ordinary river deposits dominate the stratigraphic record due to hierarchical organization in river dynamics. This understanding solves a long-standing enigma in geology and has implications for modern river systems affected by climate change and sea level rise.

SourceUniversity of California - Santa Barbara·JournalGeophysical Research Letters·DateJun 16, 2020

Late Cretaceous dinosaur-dominated ecosystem

A new study published in Geology found that Late Cretaceous ecosystems in North America were characterized by diverse and mixed diets, with resource interchange between aquatic and terrestrial components being common. The research used stable isotope analysis to reconstruct the diets and habitat use of dinosaurs and other animals, cont...

SourceGeological Society of America·JournalGeology·DateMar 18, 2020

How nodules stay on top at the bottom of the sea

A new study published in Geology reveals that deep-sea nodules remain uncovered due to their association with seafloor fauna, which forages and burrows sediment around them. The findings suggest that the regions where nodules occur are more extensive than previously thought, highlighting potential economic and conservation implications.

SourceGeological Society of America·JournalGeology·DateJan 13, 2020

Extinction of cold-water corals on the Namibian shelf due to low oxygen contents

A new study published in the journal Geology reveals that cold-water corals on the Namibian shelf have been extinct for over 4,500 years due to low oxygen contents. The researchers attribute this extinction to a shift in the Benguela upwelling system and its associated intensification of the oxygen minimum zone.

The giant geode of Pulpí

The Pulpí geode is an 11-meter hollow ovoid with crystal-paneled walls, formed from gypsum crystals up to 2 meters in size. The team studied the geology and geochemistry of the abandoned mine where the geode was found, revealing that the crystals formed at around 20 °C.

SourceGeological Society of America·JournalGeology·DateOct 15, 2019

Are we prepared for a new era of field geology on the moon and beyond?

The authors argue that space agencies should prioritize field geology training for all astronauts, including those with advanced degrees in geology. Developing new science operations strategies using emerging technologies will optimize mission productivity and unlock the full potential of scientific research on the Moon, Mars, and beyond.

Ages of the Navajo Sandstone

A new study published in Geology has determined the ages of Navajo Sandstone deposits, providing a timeline of desertification that occurred during the Early Jurassic. The findings show that parts of eastern Utah's Navajo desert are much older than previously thought, and that the giant sand sea had a wetter climate at times.

SourceGeological Society of America·JournalGeology·DateSep 9, 2019