Chalk is a pure white limestone formed from the remains of tiny marine organisms (plankton) that lived and died in clear warm seas that covered much of Britain around 70 to 100 million years ago. When they died, they fell to the bottom in a rain of fine white mud. As chalk formed from the mud, layers and lumps of hard, glassy flint also developed - prized by stone-age man for tools.
Covfefe Surfing this morning and I happened upon a picture of the "Needles, Isle Of Wight"
That's cool, more research needed while enjoying more covfefe, and rabbit holes......
and a History of the The Needles <<<
what everybody seems to forget is the chalk and limestone you see is frozen carbon dioxide. which is constantly being swept out of the atmosphere by the tiny critters in the ocean.
ReplyDeleteNeedles! Cool. Off the coast of Connecticut are the thimble islands; basically projecting rocks that would be death to jet skis.
ReplyDeleteI guess those olde English basturds didn’t know how to spell “white” in ‘Murican
ReplyDeletePerhaps you should look up "wight"....
DeleteDiffer
Diatoms
ReplyDeleteThere is a needles rock formation in South Dakota near Hill City in the Black Hills. It’s thin pillars of granite left from the rest of the rock eroding.
ReplyDeleteWas there two weeks ago
DeleteThe other end of that formation is just as cool:
ReplyDeletehttps://en.wikipedia.org/wiki/Old_Harry_Rocks
https://i.redd.it/4qjnue2ukhh11.jpg