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.
In Ancient Greece, The People Of Boeotia Were Renowned For Their?
What Iconic Children’s Show Character Got His Start In An IBM Training Film?
Which Of These Internet Pioneers Was Pivotal In Creating A Decentralized, Communication-Centered Internet?
Which Cartoon Character Managed To Turn The Name Of A Mighty Hunter Into An Insult?
Which Film Featured The World’s First Entirely Computer Generated Sequence?
Despite Popular Belief, Which Of These Animals Rarely Carries Rabies?
Which Of These Proteins Was Named Based On The Part Of The Body It Affects?