BULL. GEOL. SOC AM. 



VOL. 12, 1900, PL. 9 



Figure l.—T\vKXTv-rouT Sijiiun hi im.siulai. Ci.av kkrivkh ii;ii.m imikphvimi n (iijAMii; 

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FiGUKK 2. — Gullied Sukeace in kesibual Clay of i'uuphyuitic Granite 

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RESIDUAL CLAYS DERIVED FROM A FOLIATED BIOTITE dorPHYRITIC GRANITE 



