44 



TlMEHRI. 



131 „ with iron 



pyrites 



132 ,, with chlorite 



133 Fine grained greenstone ... 

 134 

 135 

 136 



137 

 138 



139 

 140-141 Vesicular diabase 



142 Compact greenstone 

 143-144 Amygdaloidal greenstone 

 containing kernels of 

 natrolite, glauconite and 

 calcspar 

 145 Porphyritic greenstone 



LOCALITY. 



Cuyuni river. 

 Mazaruni river. 

 Near Enamouta. 

 Quitaro river. 



,, savannah, near Shea. 



Siparuni river. 

 Upper Essequebo river. 

 Near Peaimah fall. 

 Below ,, 



New river. 

 Cuyuni river. 

 Mazaruni river. 

 Woosouter cataract, Mazaruni 



river. 

 Siparuni river. 



Near Manarie, Barima river. 

 Cuyuni river. 



Below Cobanatout cataraft, 

 Potaro river. 



Mazaruni river. 



Potaro river. 



Demerara river. 



Rupununi river. 



Mazaruni river. 



Cuyuni river. 



Mount Istua, near Pomeroon 



river. 

 Siparuni river. 

 Rewa river. 

 Curua rapid, Rupununi river. 



Warrutu cataraft, Potaro 



