How was the Canadian Shield formed?

Question

Thanks

Answer 1

http://www.google.com/search?hl=en&rlz=1C1GGGE_enUS379US379&q=canadian+shield+formation&aq=f&aqi=g2g-v1&aql=&oq=

Read widely and take good notes.

Answer 2

thanks so much

Answer 3

You're welcome.