Friday, May 6, 2016

Fact of the Day: Chalk Limestone

Chalk has been used by mankind before written history. The material is mostly made of limestone which is a very abundant type of sedimentary rock. 


  1. Sure one that stands the test of time, until maybe markers and whiteboards.

  2. When I was a kid it used to be an 'honorary' position to be allowed to erase the blackboards at the end of the day. lol

  3. Just read that comment above....I remember those days!

  4. Thank "the above Being" for chalk. How on earth would we have been taught without the good old blackboard - that's when teachers WERE proper teachers and were respected.
    And if anyone can remember - the cursive writing of the teachers - beautiful, nothing like that now.
    I wonder these days do kids really know the difference between CHALK and CHEESE????
    B J Hunnicut aka Colin

  5. Yep. I hope this turns up on Jeopardy.