Rocks and Minerals of British Guiana. 43 



NO. DESCRIPTION. LOCALITY. 



74-76 Red shale ... ... Near Encaco village. 



77 Jasper from Sandstone beds Curibiru cataraft, Essequebo 



river. 

 78-S0 „ ... ... Karakanang.Pacaraima moun. 



tains. 



81 Greenish cherty rock in beds Near Waetipu mountains. 



82 Conglomerate ... ... Itabru mountain, Berbice river. 



83-84 ,, ... ... Carabung river. 



85 „ ... ... Sacaouta,Pacaraimamountains 



86-87 „ ... ... Maccari mountain, Essequebo 



river. 

 88 „ ... ... Kaieteur fall, Potaro river. 



8q Altered conglomerate ... Below Marlissa rapid, Berbice 



90 ,, „ ... Marakang river, Pacaraima 



mountains. 



91 Junction of sandstone and Cumuti mountains, Essequebo 



greenstone river. 



92 Greenstone (Diorite) ... Mountain top, above Emoy 



river. 



93 „ ... ... Roraima mountain. 



94 ,1 ... ... Pacaraima mountains. 



95-96 ». ••• ... Tumatumari cataraft, Potaro 



river. 



97 » ••• ••• Upper Essequebo river. 



98 „ ... ... Demerara river. 



99 -101 ••• Cumuti mountain, Essequebo 



river. 



102 ,, ... ... Siparuni river. 



10 3 11 ••• ... Upper Essequebo river. 



10 4 i) ... ... ,, Rupununi river. 



10 5 ... Potaro river. 



IQ 6 ... Mattapi, Corentyne river. 



I0 7 n ••• ••• Rupununi river. 



IQ 8 „ ... ... Cuyuni river. 



10 9 >. ••• ... Pacaraima mountains. 



110 >» ••• ••• Upper Essequebo river. 



111 » •• ... „ Rupununi river. 

 1 1J 11 ••■ ... Cuyuni river. 



F2 



