. The geology of the goldfields of British Guiana. EPIDOTE GRANITITE GNEISS, x 12,TIKURU, ESSEQUIBO RIVER. Fhutu hy J. DIORITE GNEISS, x 30,TUPEKU, MAZARUNI RIVER. Ihulu Li/ J. Williams. The Fetrografhy of the, Fundamental Gneissose Complex. 35 on the Amucura lliver, Wanaparn ou the Barima River, Arimu Creekin the Cuyuni River, Parawakas Rapids on the Mazaruni and at Itakaon the Lower Essequibo. These have the following structures :— The rock is made up of a micromosaic of quartz and feldspar, someof the granules of the latter showing the characteristics of microclineand others of o
. The geology of the goldfields of British Guiana. EPIDOTE GRANITITE GNEISS, x 12,TIKURU, ESSEQUIBO RIVER. Fhutu hy J. DIORITE GNEISS, x 30,TUPEKU, MAZARUNI RIVER. Ihulu Li/ J. Williams. The Fetrografhy of the, Fundamental Gneissose Complex. 35 on the Amucura lliver, Wanaparn ou the Barima River, Arimu Creekin the Cuyuni River, Parawakas Rapids on the Mazaruni and at Itakaon the Lower Essequibo. These have the following structures :— The rock is made up of a micromosaic of quartz and feldspar, someof the granules of the latter showing the characteristics of microclineand others of oligoclase; whilst in places a few scattered small platesof muscovite are present. Streams of more or less elongatedplates of pale bluish-green hornblende traverse the rock, and areaccompanied by wisps of biotite usually more or less chloritised; rarelya few granules of augite are present; some granular epidote is acommon accompaniment of the hornblende ; small grains of sphene,and of melanite and rarely minute crystals of apatite form accessories. Epidoie-granite-gneiss.—A noticeable feature in several of thespecimens o
Size: 1657px × 1509px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectgeology, booksubjectp
