Tag

Climate History

All articles tagged with #climate history

science6 days ago•5 min saved

Online Tool Rewinds Earth's Map to 320 Million Years Ago

Researchers at Utrecht University have built Paleolatitude.org, an online platform that lets you enter any modern location and see its estimated latitude at different times up to 320 million years ago, using refined tectonic reconstructions, magnetic rock data, and dating techniques to map continental movement—and including smaller plates and lost landmasses. The tool supports studies of past climates, fossils, biodiversity, and mass extinctions, with plans to extend back further in time.

via The Daily Galaxy|

#biodiversity #climate-history #paleogeography

science23 days ago•6 min saved

From Sea Floor to Sea Stacks: Unveiling the Twelve Apostles' Formation

New research uses high‑resolution mapping and fossil analysis to pin down the Twelve Apostles’ formation: Miocene seas deposited limestone about 14 to 8.6 million years ago (with the Gellibrand Marl around 14–15 Ma and Port Campbell Limestone forming later), followed by crustal compression and tilting that began around 8.6 Ma. The dramatic sea stacks took their present form in the last 20,000–23,000 years as sea levels rose after the last glaciation, with ongoing erosion causing collapses (one in 2005, another in 2009) and the landscape continuing to evolve as a climate record from the Miocene.

via ScienceAlert|

#climate-history #geology #plate-tectonics

world29 days ago•41 min saved

How Australia’s Twelve Apostles Were Carved by Time and Tectonics

University of Melbourne researchers show the Twelve Apostles formed when millions of years of tectonic uplift lifted limestone, followed by about 20,000 years of erosion; dating now places the rocks at 8.6–14 million years old, with tilted layers and fault lines revealing ancient earthquakes, and only seven stacks remaining after collapses in 2005 and 2009. The study uses photography, mapping, and microfossil analysis to trace 15 million years of Earth history and climate records.

via Good News Network|

#australia #climate-history #geology

science2 months ago•7 min saved

Ancient Horsetail Water Reveals Meteorite-Like Isotope Signature

Scientists studying water moving through the 400-million-year-old Equisetum horsetail found an extreme oxygen-isotope signature never observed in terrestrial samples, suggesting evaporation-driven isotope enrichment and prompting a rethink of how fossil phytoliths are used to reconstruct ancient climates.

via Indian Defence Review|

#climate-history #horsetail #isotopes

science2 months ago•4 min saved

Caves Unveil Green Sahara From 8,000 Years Ago

Scientists analyzing stalagmites from caves south of the Atlas Mountains in southern Morocco find rainfall persisted from 8,700 to 4,300 years ago, signaling a greener Sahara; uranium-thorium dating and oxygen isotope analysis tie the wetter period to tropical moisture plumes, and archaeological records show Neolithic communities expanding there as grazing lands widened.

via The Daily Galaxy|

#climate-history #morocco #neolithic

science2 months ago•4 min saved

Antarctica Unlocks 23-Million-Year Climate Tale From a 523-Meter Ice Drill

Researchers drilled 523 meters into Crary Ice Rise in West Antarctica to recover a 228‑meter sediment core, revealing a 23‑million‑year archive of climate and ice‑sheet dynamics, including past open‑ocean conditions and potential West Antarctic Ice Sheet retreats during warmer periods, informing predictions of future sea‑level rise under ongoing warming.

via The Daily Galaxy|

#antarctica #climate-history #icecore

science4 months ago•6 min saved

Shifting Plates Drive Climate Through Deep Carbon Recycling

New computer-model research shows Earth’s plate movements—especially mid-ocean ridges and continental rifts—have been a major driver of long-term carbon cycling. Carbon stored in seafloor rocks is released or sequestered as plates move and subduct, helping to trigger greenhouse or icehouse climates over the last 540 million years. Historically, volcanic arcs were thought to dominate carbon release, but the study finds that divergent plate boundaries played a larger role, with arc emissions rising mainly in the last ~120 million years due to the evolution of planktic calcifiers.

via ScienceAlert|

#carbon-cycle #climate-history #deep-ocean

science6 months ago•3 min saved

Ancient Plant Reveals 400-Million-Year-Old Water and Earth's Climate Insights

Scientists from the University of New Mexico discovered that ancient horsetails contain water with oxygen isotope ratios so unusual they resemble extraterrestrial materials, offering new insights into Earth's prehistoric climate and aiding the reconstruction of ancient humidity and climate conditions.

via SciTechDaily|

#ancient-plants #climate-history #earths-past

science7 months ago•2 min saved

Scientists Uncover Mathematical Rule Governing Stalagmite Formation

Scientists have discovered that stalagmites follow a single mathematical rule based on water drip rate and calcite deposition, which can help improve understanding of past climate conditions by analyzing their layered structures.

via Live Science|

#cave-formations #climate-history #geology

science8 months ago•4 min saved

Ancient Rainforest Discovered on Treeless Island

Scientists discovered a buried ancient cool-temperate rainforest on the Falkland Islands, dating back to the mid-to-late Cenozoic era, revealing a wetter, forested past that contrasts with the current treeless landscape, and providing valuable data for understanding climate change and ecosystem shifts over millions of years.

via Earth.com|

#climate-history #falkland-islands #fossil

science9 months ago•4 min saved

Scientists Discover Hidden Underwater Canyons Beneath Antarctica's Ice

Scientists have uncovered a hidden ecosystem beneath Antarctica's ice, centered around the ancient Transantarctic Mountains, which have shaped the continent's geological and climatic history over hundreds of millions of years. These findings, including fossilized trees and insights into tectonic activity, enhance understanding of Earth's past climate cycles and could inform predictions about future climate change impacts.

via Rude Baguette|

#antarctica #climate-history #fossilized-trees

science9 months ago•3 min saved

NASA Uncovers Mysterious White Spot in Sahara Desert

NASA scientists using space imagery discovered a white salt deposit on a volcanic peak in the Sahara, revealing evidence of an ancient lake and the region's past green, water-rich climate, highlighting the Sahara's dramatic environmental changes over millennia.

via evidencenetwork.ca|

#climate-history #nasa #sahara-desert

science9 months ago•0 min saved

Ancient Tree Uncovers Past Solar Storm

An ancient tree has revealed evidence of a catastrophic solar storm that occurred thousands of years ago, providing new insights into historical solar activity and its potential impact on Earth.

via bgr.com|

#ancient-trees #climate-history #natural-disasters

science10 months ago•5 min saved

Scientists Unveil 540 Million Years of Sea Level Changes

Scientists have reconstructed detailed sea level variations over the past 540 million years, revealing short-term fluctuations linked to climate cycles and ice sheet dynamics, which improve understanding of Earth's geological history and aid in resource management.

via Phys.org|

#climate-history #earths-past #geology

science10 months ago•3 min saved

Mars' Clay Layers May Harbor Signs of Ancient Life

A new study suggests that thick, mineral-rich clay layers on Mars, formed around 3.7 billion years ago in stable, water-rich environments, could potentially harbor signs of past life, offering insights into the planet's ancient climate and habitability.

via Space|

#clay #climate-history #habitable-environments