Zhaocun bentonite deposit oringnated from tuff rich in volcanic hyalocrystalline,which underwent hydrolysis and alteration in Changxing county,Zhejiang province.The deposit has middle scale.
They can be divided into low sulphidation and high sulphidation types,with typical wall rock altera tion and alteration zonation of epit hermal de-posit.
Research shows that the dawsonite in Hailaer Basin exists in both the eroded volcano tuff and sedimentary volcano tuff,and is paragenous with corrensite and allevardite frequently.
Scientists in Australia found microbes known as Thiobacillus concretivorans that lived in, indeed, could not live without-concentrations of sulfuric acid strong enough to dissolve metal.
Acidic gases and heat escaping from magma can corrode rock through a process called hydrothermal alteration, gradually turning hard stone into soft clay.
It had just taken longer than the anticipated 24 to 48 hours for salty seawater to gnaw through the wire, probably because chemistry happens at a slower pace in subfreezing Arctic seawater.
天文学百科 The Astronomy Book (Big Ideas Simply Explained)
Over a number of years, Romer carefully timed the eclipses of the moon Io and found that their duration varied depending on whether Earth was moving towards Jupiter or away from it.
I have always been interested in Amazons, and I actually began by drawing them and making etchings of Amazons because I loved their costumes and the way they were portrayed as these strong, independent women.