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. 

8 comments:

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

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  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

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

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  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

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

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