What is Ironstone? (and how did shrimp build a bridge?)

#Geology #Ironstone
Why is the Sydney Harbour Bridge made of poo? What does this tell us about ironstone, and what can ironstones teach us about Earth history?
Geologist Dr Brooke Johnson gives us a quick introduction to ironstones and how they form, and shows how the behaviour of living things million
or even billions of years ago, can influence the world we live in today.
Learn about the history of Cleveland ironstone mining - landofiron.org...
Modern shrimp burrows and other animal traces - www.georgialif...
T-shirts - www.geologyjoh...
Music - open.spotify.c...