396 



EDWARD STEIDTMANN 



TABLE VIII 



The Percentages or Calcium and Magnesium in Calcium- and Magnesium- 

 bearing Minerals, Characteristic of Dynamic Metamorphism 



Mineral 



Actinolite 



Anthophyllite 



Augite 



Biotite 



Chlorite 



Cordierite 



Hornblende 



Serpentine 



Spinel 



Scapolite , 



Tourmaline 



Tremolite 



Vesuvianite 



Wollastonite 



Zoisite 



Ca 



Mg 



Variable 

 Variable 

 Variable 

 Variable 

 Variable 



Variable 

 Variable 

 Variable 



TABLE IX 

 Dynamic Metamorphism 



Materials lost by contact metamorphism. — Contact metamor- 

 phism of the sediments tends to develop minerals of complex 

 constitution and high specific gravity. The materials in excess 

 of the requirements for the development of adapted minerals 

 tend to be removed, and in part may reach the sea. The relative 



