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Ancient Rocks

All articles tagged with #ancient rocks

Perseverance Ventures Into Mars’ Deep Crust, Uncovering Ancient Rocks
science13 days ago

Perseverance Ventures Into Mars’ Deep Crust, Uncovering Ancient Rocks

NASA’s Perseverance rover has pushed beyond Jezero Crater into the Lac de Charmes region, capturing a selfie and surveying ancient, potentially igneous rocks that could illuminate Mars’ deep crust and early volcanic history. With almost 26 miles traveled and 27 rock cores collected (25 sealed for potential return), the mission shifts toward studying Mars’ primordial interior, with future targets like Gardevarri and Singing Canyon expected to reveal more about the planet’s infancy.

via The Daily Galaxy|
#ancient-rocks#jezero-crater#mars
New findings suggest earlier oxygenation of Earth's oceans and atmosphere
science11 months ago

New findings suggest earlier oxygenation of Earth's oceans and atmosphere

Scientists have uncovered new evidence that the rise of oxygen in Earth's atmosphere, known as the Great Oxidation Event, began earlier than previously thought, around 2.5 billion years ago, leading to significant changes in the planet's environment and the evolution of complex life. Using advanced geochemical techniques on ancient rock cores from South Africa, researchers traced nitrogen isotope ratios to reconstruct the timeline of oxygenation, revealing a gradual process that profoundly shaped Earth's biosphere.

via Earth.com|
#ancient-rocks#biological-evolution#earths-history
"Vandals Destroy Ancient Rock Formations at Lake Mead National Recreation Area"
us-news2 years ago

"Vandals Destroy Ancient Rock Formations at Lake Mead National Recreation Area"

The National Park Service is seeking the public's help to identify two men captured on video toppling an ancient rock formation at Lake Mead National Recreation Area in Nevada. The incident, which occurred on the Redstone Trail, has sparked outrage, with park officials urging anyone with information to contact the authorities. Vandalism in national parks is unfortunately common, but the deliberate destruction of ancient natural formations has drawn widespread condemnation and calls for accountability.

via The New York Times|
#ancient-rocks#lake-mead#national-park-service
"Revealing Earth's Early Evolution: Insights from 3.5 Billion-Year-Old Rocks"
earth-science2 years ago

"Revealing Earth's Early Evolution: Insights from 3.5 Billion-Year-Old Rocks"

Researchers have gained fresh insights into Earth's early evolution by studying rocks formed 3.5 billion years ago in the Singhbhum Craton, India, as well as in South Africa and Australia. The study revealed that explosive-style volcanic eruptions were common in these regions around 3.5 billion years ago, mostly occurring under oceans. Understanding these early Earth processes is crucial for piecing together the planet's evolutionary history and the conditions that may have sustained life during different geological epochs.

via Phys.org|
#ancient-rocks#earth-science#earths-early-evolution
Ancient Earth: Active Plate Tectonics 3.3 Billion Years Ago
science2 years ago

Ancient Earth: Active Plate Tectonics 3.3 Billion Years Ago

A new study analyzing olivine grains in 3.27-billion-year-old rocks suggests that Earth may have had active plate tectonics over 3.3 billion years ago, challenging previous beliefs that early Earth had a stagnant crust. The research indicates that the crust may have started moving due to pressures and melting similar to modern subduction zones, potentially leading to the transition from a stagnant crust to plate tectonics around 3.8 to 3.6 billion years ago. This finding sheds light on Earth's ancient geological processes and the evolution of its tectonic activity.

via Forbes|
#ancient-rocks#earths-history#geology
Ancient Handcrafted Spheres: Unraveling the Mystery
archaeology2 years ago

Ancient Handcrafted Spheres: Unraveling the Mystery

Ancient limestone spheroids found at the 'Ubeidiya prehistoric site in Israel, dating back 1.4 million years, were intentionally shaped to achieve a spherical form, according to archaeologists. The more the spheroids were worked, the rounder they became, indicating a deliberate goal of achieving perfect geometry. The purpose of these spheroids remains unknown, but their intentional production suggests a complex cognitive process and the earliest attempt at imposing symmetrical geometry on stone tools.

via ScienceAlert|
#ancient-rocks#archaeology#cognitive-process
"Unearthing the Ancient Origins of Earth's Earliest Glaciers"
science2 years ago

"Unearthing the Ancient Origins of Earth's Earliest Glaciers"

Scientists have discovered evidence of the oldest glaciers ever found, estimated to be 2.9 billion years old, in ancient rocks beneath South Africa's largest gold deposits. The rock beds near Durban contain fossilized glacial moraines, indicating the presence of glaciers during that time. The analysis of oxygen isotopes in the rocks suggests that the Earth experienced gradual climatic cooling, potentially leading to a global cooling period. The findings provide new insights into Earth's early history and may help explain the formation of goldfields. Further research is expected to follow to validate these discoveries.

via ScienceAlert|
#ancient-rocks#earths-history#glaciers
"From Space to Style: Meteorite Hunter Transforms Ancient Debris into Timeless Jewelry"
science-and-technology2 years ago

"From Space to Style: Meteorite Hunter Transforms Ancient Debris into Timeless Jewelry"

Emil Davidsson, a meteorite hunter from Buenos Aires, has turned his passion for collecting ancient space debris into a business by crafting them into jewelry. He sells pendants made from small fragments of meteorites estimated to be between one million and 4.5 billion years old, as well as watches and rings. Emil has been on expeditions to the Arctic Circle and the Atacama Desert to find these rare meteorites, using a special metal detector to locate them. Each type of meteorite requires a different process to stabilize and reveal their unique features, such as the Widmanstätten pattern. These meteorites are remnants from the formation of our solar system and hold immense historical value.

via Good News Network|
#ancient-rocks#craftsman#jewelry