Constitution' of the batho1ith-Continued Introduction ______________________________________ _ Genernl geologic relations _______________________ _ Previous geologic work _________________________ _ Acknowledgments _____________________________ _ Wu.llrocks u.nd roof rocks ___________________________ _ Pu.leozoic rocks ________________________________ _ Mesozoic rocks ________________________________ _ Structure _____________________________________ _ Evolution of the gross structure _________________ _ Metamorphism ________________________________ _ Age of the batholith ________________________________ _ Older plutonic rocks of the west walL ________________ _ Constitution of the batholith ________________-____ _ Lithologic groupings of the plutonic rocks _________ _ Compositionn.l classifica.tion ______________________ • Mafic plutonic rocks