BULL. GEOL. SOC. AM. 



VOL. 12, 1900, PL. 11 



FlCJURK 1. — 'J'lllRTV-FOOT SeCTIUN OF V A Itl-CnluKKU KE.SIIH Al. Cl.AY 



I>t'iive(i fidiM (le<-:iv ul' triieiss 



FlGURK 2. — FoRTV-KO(JT SkcTIUN OF KKSIUVAI. Cl.AY 



Derived from decay ul' gneiss. Original M.-hi<tosity planes of fresh rock perfectly i)reserved 



RESIDUAL CLAYS DERIVED FROM DECAY OF GNEISS, NEAR ATLANTA, GEORGIA 



