The mysterious "star dune" in the Sahara desert is on the move.
@popsci reports: "Morocco's Lala Lallia — one of the world's oldest known 'star dunes' — is slowly inching west."
The mysterious "star dune" in the Sahara desert is on the move.
@popsci reports: "Morocco's Lala Lallia — one of the world's oldest known 'star dunes' — is slowly inching west."
Black velvet #malachite display piece looking phenomenal in this light. Don't you just want to reach out and pet it like a precious little kitten? Very good looking piece.
British Geologist And Astronomer John Michell died #OTD in 1793.
He is the first person known to have proposed the existence of stellar bodies comparable to black holes, and the first to have suggested that earthquakes travelled in (seismic) waves. He invented an apparatus to measure the mass of the Earth, and explained how to manufacture an artificial magnet.
Could magma be moving deep below the surface on the border of Germany and the Czech Republic? And if so, what is the significance? Recently installed seismometers in the Vogtland region captured a swarm of earthquakes, suggesting a “complex seismic situation” could be developing. Live Science explains.
https://flip.it/xMLNt9
#Science #Earthquakes #Germany #CzechRepublic #Geology
Scientists have mapped one of the most hazardous spots on the globe in unprecedented detail: a 600-mile geologic boundary just off the #PacificNorthwest coast.
Along this fraught stretch, called the #CascadiaSubductionZone, 2 pieces of the #Earth’s crust slide against each other, building up stresses capable of unleashing a catastrophic 9.0-magnitude #earthquake & generating a #tsunami, w/waves as high as 40 feet.
#science #geology #climate
https://www.washingtonpost.com/science/2024/06/07/earthquake-tsunami-cascadia/
American geologist and educator Florence Bascom was born #OTD in 1862.
She was the first woman to earn a Ph.D. in geology from Johns Hopkins University in 1893. Bascom's work was instrumental in mapping the geology of the mid-Atlantic Piedmont region. She was the first woman hired by the U.S. Geological Survey (USGS) and became one of the foremost experts on the crystalline rocks of the Piedmont region.
5.5 million years ago the Mediterranean dried out, with sobering lessons for humanity today – new research
What would happen if humans dried out the Mediterranean sea, turning it into a giant salt lake? Would its wildlife survive, and if so, how long would it take to recover?
By Daniel García-Castellanos and Konstantina Agiadi via @ConversationUS
The World’s Oldest Glaciers Are Buried Under South African Gold
2.9-billion-year-old evidence could be proof of a lost ice age—the first “Snowball Earth.”
by Gemma Tarlach via @atlasobscura
https://www.atlasobscura.com/articles/oldest-glaciers-lost-ice-age