134 Ghcqjman and Thiele : Limhvrgite Rock. 



90.70 99.20 100.87 



less O 0.01 



100.86 



EXPLANATION OF PLATES. 



Plate XL. 



Fig. 1. — Section of 1 imburgite-rock (monchiquite), showing 



general structure, x 18. 



Fig. 2. — ^Crystal of ilmenite surrounded by olivine, felspar 

 and augite. x 140. 



Platk XLT. 



Fig. 3. — ^Crystals of olivine, with zones of magnetite (probably 

 titaniferous). x 140. 



Fig. 4. — Intergrowth of olivine and magnetite, showing a rude 

 centric structure (poicolitic). x 140. 



