Tag

Erosion

All articles tagged with #erosion

environment7 days ago•209 min saved

Hawaii's 550-Year-Old Hōlei Sea Arch Collapses After Tropical Storm

The Hōlei Sea Arch, a 90-foot landmark in Hawaii's Volcanoes National Park, collapsed into the Pacific Ocean between September 23 and 28, 2026. Formed 550 years ago by lava flows, the structure fell due to differential erosion, a process park officials had long predicted would eventually destroy the arch. The collapse occurred during a closure for Tropical Storm Nolo, with the structure confirmed standing on September 23 but missing when the park reopened on September 28.

via CNN|

#climate #environment #erosion

weather12 days ago•3 min saved

Nor'easter Severs Outer Banks Link, Exposing Decades of Erosion Crisis

A powerful nor'easter has severed road access to North Carolina's Outer Banks by damaging NC 12, exposing a long-term crisis of coastal erosion. While emergency ferry services now connect Hatteras Island to the mainland, the storm highlights the fragility of barrier islands where dozens of homes have already collapsed. Officials face a choice between temporary repairs and a potential $1 billion infrastructure overhaul, as rising seas and chronic erosion continue to threaten communities in Rodanthe and Buxton.

via nypost.com|

#erosion #infrastructure #noreaster

science1 month ago•55 min saved

Arctic Rivers Break Erosion Rules as Thaw Accelerates Sediment Loss

Canadian researchers combining Arctic fieldwork with glass-flume lab experiments found that river erosion on frozen ground can outpace temperate landscapes: during thaw, water channels through thawed sediment, increasing erosion by about 10x compared with unfrozen conditions. The results, supported by Devon Island field tests, suggest Arctic erosion will intensify as temperatures rise and more river networks form.

via Yahoo|

#arctic #climate-change #erosion

science1 month ago•5 min saved

Arctic thaw spurs rapid river erosion, defying frozen-ground assumptions

Canadian researchers found that river erosion in the High Arctic can accelerate markedly during seasonal thaw, with lab flume experiments and field tests showing sediment erosion about 10 times faster than on unfrozen ground. The mechanism involves a shallow thaw layer that meltwater can’t penetrate through, causing water to split and carry more sediment, reshaping river channels as permafrost thaws. This challenges the idea that frozen ground always slows erosion and highlights the need for year‑round Arctic data as climate warming unfolds. The study was published in Communications Earth & Environment.

via ScienceAlert|

#arctic #climate-change #erosion

politics1 month ago•381 min saved

DEI Cuts Leave Rural Utilities Struggling with Sewage, Air Quality and Erosion

Trump-era cuts to DEI programs have undermined public-works and environmental monitoring projects from Georgia to Alaska, collapsing efforts to install indoor plumbing in rural villages, provide septic tanks in Alabama, and fund air-quality monitoring, leaving residents without basic sanitation and exposing families to health risks amid worsening pollution and erosion.

via NBC News|

#air-pollution #dei-cuts #erosion

environment2 months ago•4 min saved

Malibu Coast Erosion Halts Beach Access After Sudden Bluff Collapse

Severe coastal erosion along Malibu’s Point Dume bluffs has created eight-foot drop-offs, prompting closures of Westward Beach Road and the beach parking area as authorities warn of dangerous conditions amid ongoing rebuilding from the Palisades Fire; swells from Hurricane Genevieve are fueling the damage, with temporary toilets installed and no reopening timeline yet.

via New York Post|

#california #coastline #environment

science4 months ago•10 min saved

Apollo Bootprints Might Endure for a Million Years on the Moon

The Moon’s windless, waterless environment preserves Apollo bootprints for a very long time, with LRO imagery showing tracks decades after the landings. However, slow erosion from micrometeorite impacts and a process called impact gardening gradually churns the top few centimeters of regolith, meaning there’s no precise expiry date for a single print. A million-year timescale is plausible but not guaranteed, and some experts estimate traces could fade over tens to hundreds of millions of years. In any case, the landing-site marks will outlast nearly all human-made structures while slowly disappearing on geological timescales.

via Space Daily|

#apollo #erosion #micrometeorites

science5 months ago•5 min saved

Tadpole-Shaped Islands Spotlight Azerbaijan’s Mud-Volcano Belt

NASA’s Earth Observatory highlights tadpole‑shaped mud‑volcano islands off Azerbaijan’s Absheron Peninsula, formed by explosive mud eruptions and sculpted by currents. Azerbaijan hosts hundreds of mud volcanoes on land and in the South Caspian Sea, with notable islands like Xərə Zirə Adası and Səngi Muğan Adası that have violent eruption histories and ongoing vent activity, illustrating a geologically active, methane‑rich landscape.

via NASA Science (.gov)|

#azerbaijan #caspian-sea #erosion

science5 months ago•6 min saved

NASA Rewrites the Eye of the Sahara's Origin: A Dome of Uplift and Erosion

NASA’s Earth Observatory reveals, via Landsat 9 and Landsat 8 imagery, that Mauritania's Richat Structure—the Eye of the Sahara—is not an impact crater but a giant, multi-layered dome formed by an ancient igneous intrusion uplifted during the Cretaceous and sculpted by differential erosion, producing the concentric rings visible from space and offering insights into Earth's tectonic and erosional history.

via Indian Defence Review|

#erosion #eye-of-the-sahara #geology

science7 months ago•6 min saved

Yonaguni Underwater Formations Likely Natural, Not Ancient Ruins

New studies presented at the 2024 Association of Japanese Geographers conference argue that the Yonaguni Monument’s sea-floor terraces are natural formations created by tectonic fracturing and erosion, not evidence of ancient human construction or Atlantis; while some researchers and visitors persist in the myth, no archaeological traces of humans have been found.

via Indian Defence Review|

#atlantis-myth #erosion #natural-formation

science7 months ago•37 min saved

Earth’s Billion-Year Rock Gap Traced to Early Continental Erosion

Geologists link roughly a billion years of missing rock to a major erosion event that predates Snowball Earth and Rodinia, pointing to the formation of the first supercontinent Columbia as the trigger and reshaping the story of Earth’s early history and the Cambrian-era animal record.

via Yahoo|

#columbia-supercontinent #erosion #great-unconformity

science8 months ago•4 min saved

Cosmogenic Clocks in Beach Sand Reveal Earth's Ancient Timeline

Tiny zircon grains in Australia’s coastal sands trap krypton produced by cosmic rays, providing a natural clock that lets scientists measure how long minerals stayed near the surface and reconstruct long-term landscape evolution, erosion patterns, and sediment storage—insights that could inform mineral exploration and our understanding of Earth's deep time.

via The Daily Galaxy|

#cosmogenic-krypton #cosmogenic-nuclides #erosion

science1 year ago•6 min saved

Mystery of River Splits Solved After a Century

A recent study using 36 years of satellite data has revealed that rivers split into multiple channels when erosion outpaces sediment deposition on opposite banks, a finding that clarifies a century-old mystery and has implications for river restoration and flood management.

via Earth.com|

#deposition #erosion #geomorphology

space2 years ago•2 min saved

Methane Waves Erode Titan's Alien Shores

Scientists analyzing data from the Cassini spacecraft have found evidence suggesting that waves on Titan's methane and ethane lakes may be eroding and reshaping the moon's shorelines, similar to processes on Earth. This discovery, published in Science Advances, adds to the ongoing debate about the presence of waves on Titan and could provide insights into the moon's wind patterns.

via Space.com|

#cassini #erosion #methane-lakes

transportation2 years ago•5 min saved

"Persistent Threat: Big Sur's Ongoing Battle with Highway 1 Collapses"

The closure of a stretch of Highway 1 in Big Sur due to erosion has left communities in uncertainty, as Caltrans works on a temporary fix to allow limited access. The area's geology, prone to rockslides and erosion, makes the road vulnerable to frequent closures and repairs. Engineers are assessing the damage and stabilizing the road, with a temporary traffic signal planned for more regular traffic. However, a permanent fix may take months, as Caltrans grapples with the challenging terrain and the need to keep the road stable.

via LAist|

#big-sur #caltrans #erosion