Hi to all, here I am again. I completed all but three of this crossword puzzle.
#1. Generalized class of the ultramafic igneous rocks typical of the earth\'s mantle.(10 letters. P_R_ _ _T_ _E
#2. The abundance of this mineral in lava usually produces violent, explosive volcanic eruptions.(6Letters) last one is an \"A\"
#3. Lense-shaped igneous intrusion that commonly penetrates between bedding planes of older rock. (9Letters). _ _C_O_ _ _H
Thanks to all,