Felsic - "light" rocks, contain light colored minerals (Also low temp minerals See Bowen's Reaction Series above) (quartz, Potassium feldspar, micas)
Mafic - "dark" rocks, contain dark colored minerals (Also high temp minerals See Bowen's Reaction Series above)
(Pyroxene, Amphibole, Calcium Plagioclase)
Rock hunting 101 ... collecting Oregon Coast agate and 15 million year old fossil mollusks
Granite breakdown, How granite is formed
Picture Identification Guide for Polished Stones and Tumbled Rocks
No comments:
Post a Comment
Thank you for stopping and taking time to leave a message