CONTENTS. 
I.—Origin of the Rocks of the Cahaba Coal Field and adjacent 
Regions, and the Agencies which have brought them into 
their present position............. t Auapninc a wumea Ga aan Page 137 
II.—Classification of these Rccks, and their distinguishing Char- 
ACCCTS nace ees MaKaida dees ceea’salglewogal ys 4082 4 a Bere Page 146 
III.—Distribution of the Rocks of the different Geological Forma- 
tions in the Valleys bordering the Cahaba Coal Field. Page 159 
