What Is Chalk Made Up Of?
Answer: Plankton Fossils
Chalk is just some soft rock that rubs off easily on other rocks like slate, right? Nothing interesting to see, that is unless you break out the electron microscope and delve into the microtopology and history of it.
Peer close enough at a hunk of chalk and you’ll make an interesting discovery. Chalk is composed of millions of tiny, soft calcite fragments (calcium carbonate) all crushed together under pressure. These fragments are minute calcite plates shed by a type of plankton, coccolithophores, millions of years ago.
In areas of the ocean rich with these little organisms, trillions upon trillions of little shed plates would accumulate like snow on the bottom of the ocean and then, under the enormous pressure of the water, would become fused together. Movement of the tectonic plates slowly pushed these enormous deposits of chalk onto land where, eons after their creation, humans happily mine them.
Which Iconic Sci-Fi Figure Made A Cameo Appearance In Every Episode Of Firefly?
Tesla Originally Believed His Radio Allowed Him To Communicate With Whom?
Film Scores Were Originally Introduced To?
The Standard Galactic Alphabet From Commander Keen Also Appears In Which Of These Games?
The Only Other Game Made By The Inventor Of Scrabble Was Called?
Elisha Otis Paved The Way For The Skyscraper With The Invention Of?
The First Post On Snopes.com Was About?
Which One Of These Iconic Novels Sold Less Than A Few Dozen Copies A Year For Decades After Publication?
Thomas A. Swift’s Electric Rifle Is Widely Used By What Organization?