Plate 3 





r .-~:^ 



' S / 





Figure 1 Serpentine replacing calcite with development of charac- 

 teristic scalloped boundary between the two minerals. A residual 

 tongue of calcite projecting into serpentine near center x50 



Figure 2 Characteristic form of replacement serpentine, with residual 

 masses of calcite scattered through it x70 



