#China is home to around 200 #tiankeng, which are mostly distributed from the central #Shaanxi province down to the #GuangxiZhuang autonomous region in the southwest. Roughly 1/3 of the country consists of #karst — the highest proportion of overall surface area of any country in the world — compared with just under 1/5 in the United States.
The USGS reported that the earthquake’s epicenter was in #Lebanon, NJ about 50 miles west of #NYC, where residents darted into streets wondering what had just happened.
#SasquatchResources is trying to determine if it’s economically feasible to mine metals from the tailings of four former mines that closed decades ago.
The company says if it goes ahead, it would clean up the #environmental mess that was left behind.
Day20 #ArtAdventCalendar Sometimes I feel "stone-agey" in #design, especially after a #hike in a very special mountain #forest. An ancient #ochre quarry is hidden on the slope. #Legends tell of a magical snake at a spring, often a reference to #geological features. There is still some eroded rock in different ochre colours. I first hammer it into small pieces until I can grind it. This produces pure ochre pigment.
Gorgeous lepidolite specimen that friends bought from the recent Rocks & Minerals show here.
#Lepidolite is a lilac-gray/rose-colored member of the #mica group of #minerals . It's the most abundant #lithium bearing mineral & al secondary source of this metal. It's a major source of the alkali metal #rubidium too.
Scientists Discover Astonishing 36-Million-Year Geological Cycle That Triggers Bursts of #Biodiversity
“Scientists have published research indicating that movements in Earth’s tectonic plates indirectly stimulate bursts of biodiversity through 36-million-year cycles by causing sea levels to rise and fall. They believe that these #geological cycles, traceable back 250 million years, critically influence marine species diversity.”