CROSS-SECTIONS 



439 



phyllite ridge runs parallel with the marble for nearly four miles, but in 

 the other eases the phyllite ridges diverge from the marble and allow 

 dolomite lands to intervene. 



The occurrence of the Alabama marble wholly at low elevations in a 

 well defined valley presents a striking contrast to the occurrence of the 



Figure 1. — Idealized Section, showing the Marble-Schist Contact high above the drainage 

 Lines as represented in some Areas of the Vermont Marble Deposits 



1. Schist. 2. Marble 



Figure 2. — Idealized Section, shoiving the less elevated Position of the Marble-Schist 

 Contact above the drainage in the Georgia Marble Deposits 



1. Schist. 2. Marble 



I F 2. F 3 F "9- 



I?igure 3. — Idealized Section, showing the topographic Relations of Schist, Marble, and 

 Dolomite in the Alabama Marble Deposits 



1. Phyllite. 2. Dolomite. 3. Marble. 4. Talladega phyllite. F. Fault 



Vermont marble deposits and also to the occurrence of many of the 

 Georgia and Tennessee marble deposits. In the Vermont area many of 

 the quarries are high above the drainage lines and there are large areas 

 of outcropping marble on the slopes. In Georgia and Tennessee the same 

 is true, with the exception that the line between the marble and the over- 

 lying schist is at a relatively lower elevation on the valley slope. This 



