nice job eric. c'mon esshup get w/ the program, everybody knows that the Mesozoic is between the Paleozoic and the Cenozoic, and grano-diorite is compositionally in between diorite and granite
jhap's rocks are part of the great Sierran Batholith, that as eric described so nicely, is a crustal structure consisting of many plutons that intruded older Paleozoic metamorphic rocks (known as roof pendants). the plutons coagulated, and slowly crystallized some 10 to 50 km below the surface. tectonic activity (uplift) and erosion of the roof pendant have brought them to the surface as we see them today. that's pretty historic
my property is quite different, i own a slice of metamorphosed volcaniclasitc rocks, the remnants of an island arc (like japan is today) that hit CA back in the Cretaceous. they have been folded and faulted, kind of shaley and highly fractured, they have lost their self respect and make lousy clay soil.
