Don't want to be too pedantic about this however......
a mineral is a single solid formed from rock which does not burn at "room temperature".
Coal is formed from organic substances.
I don't know why it is classified as sedimentary rock when it is not a rock. Maybe to lump it in together with minerals to make mining exploration licences easier to get?![]()
- Forums
- Science & Medicine
- Mini Ice Age Imminent
Mini Ice Age Imminent, page-48
-
- There are more pages in this discussion • 2 more messages in this thread...
You’re viewing a single post only. To view the entire thread just sign in or Join Now (FREE)