TIL that natural chalk is made of the skeletal remains of tiny sea creatures like plankton;
en.wikipedia.org/wiki/Chalk
#TIL #TodayILearned #Chalk #Rocks #SedimentaryRocks #Geology #Plankton #Microorganisms
Rhea Murray 💜
@owlofanarchy.bsky.social
3.3K followers 4.8K following 479 posts
Queer, neurodivergent amateur writer and aspiring blogger. Fond of anime, music, languages, and learning things. Speaks Japanese fluently, but can’t read/write it. She/They, 26. www.tumblr.com/blog/whiterosechrista
