I plan to take it pretty easy! There are a few spots on the shore of the Bay of Fundy and the rivers/streams in the area south of the bay. If anyone is interested, here is some info:
http://www.gov.ns.ca/natr/meb/data/p...01_18White.pdf

I live in the light green area that's labelled as being sedimentary and volcanic rock

If you search the article for 'slate', you'll find info on the various colors and a little about the rarity of the occurrence of the color in the province.