1110 General Notes. 
those produced by the separating from a molten magma of certain 
portions, and their consolidation into a rock mass by the cooling of 
crystallized; the quartz was corroded and around its edges a 
light colored augite was formed. n the h ritic inclusions 
remains of quartz and feldspar are still to be found ; in the 
ones all traces of the original minerals have disap , the 
SiO, Al,O, CaO MgO K,O Na,O H,O 
57.50 18.11 4.63 1.20 6.98 2.40 10.48. 
—The islands off the coast of Morbihan, France, contain strata of 
1 Miner. u. Petrog. Mitth., x., p. 1. 
