V2r 



Plate N < 



tijr tftrotoqirul ttfconnoissiiurr 

 8Z&ZZ of yiHf-aos-iA. 



PROF. WILLI AJVI B ROGERS. 



ISJti. 

 Limestai* Quart zWui CEQ AiuvgllaloUl SJ 



SuiuLsiiuh- | i Qnvts U Sliale 



Congkttn' r ;itc W*1 Felspar (j^) ban Ore 



Slate ■ IGpa, LiJ Si.i..l>«m.--.vi- 



\n-jiurraiu or ! 

 Soad^l (inmJ IS Ha«J,tande f£) fflfa—Lta 



Ditto State 



