301 METEOROLOGY AND GEOLOGY 



Notes ox the Collections of 



KOCKS AND MINEKAL SPECIMENS FKOM THE UGANDA 



PK()TECT( )RATE 



made by sir HAEEY JOHXSTOX, MESSKS. GEOEGE WILSON, EACEY. WM. GEANT. C. ^V. 

 HOBLEY, F. W. ISAAC, AND OTHEES. 



By Messrs. T.. Fletcher akd G. T. Prior, of the Mixeralogical Department, 

 British Natural History Museum. 



The rock specimens include examples of the Arclia?an gneisses, schists, and granites, 

 Avhich constitute the main mass of the Uganda ])lateau : specimens of these rocks 

 come from the Busoga, Bukedi, Elgon, and Unyoro Districts, from Ru^venzori and 

 the Nile Province. Besides these basement rocks, there are si)ecimens of ferruginous, 

 schistose, and slaty rocks from Unyoro, possibly belonging to the Palajozoic Karagwe 

 series ; coarse ferruginous sandstones and quartzites from the shores of Lake Victoria 

 Nyanza and Lake Naivasha, and from Ankole ; and volcanic rocks (chiefly phonolites) 

 from the Elgon and Baringo Districts, the Kamasia hills, Lake Nakuro, and the Nandi 

 District. 



Of minerals of economic value, the collection contains specimens of iron ore, 

 graphite, and diatomaceous earth. The iron ore includes specimens of magnetite from 

 Budolo hill, Masaba (Elgon) ; Nagarive hill, Bukedi ; and Jinja, Busoga ; and of 

 ironstone (limonite chiefly), from Bukonge and .Jinja in Busoga, from the Bugaya islands, 

 Buvuma, Kavirondo Bay, Ankole, and Unyoro. (iraphite is present in small amount 

 on specimens from Unyoro (Chief Byabaswezi), and the diatomaceous earth occurs 

 8 miles west of the Katonga River, and also on the shore of Lake Nakuro. As to 

 the occurrence of gold, all that can be said is that no visible gold could be found 

 upon any of the numerous specimens of quartz in the collection. 



The Cataloyue of Sjucimens jivoceeth in (jeuuniphival (jrih-r from East to West. 

 MAU, NANDI, AND BARINGO DISTRICTS. 



Lucalitj. Nan.e. 



Cliti's on north-west coast of Lake Nakuro . . Kenyte. 



Hill facing Lake Nakuro, south of railway station . Tuft'. 



Hill north of railway station, Lake Nakuro . . Glassy lava (Kenyte). 



Hill north-east and 5 miles from Lake Nakuro . Scoria. 



Shore of Lake Nakuro Diatomaceous earth. 



Seget Valley, Nandi District Phonolite. 



Sigowet hills, „ „ 



Bed of Seget River, Nandi District .... 



Ivamasia hills, below ravine Red ja.sper, quartz, cLalcedon, 



calcite, and ]ihonolite. 



Baringo District, Eldama Ravine .... Basalt, scoria, and jihonolite. 



Lake Naivasha Obsidian tuft', sandstone. 



Bed of Nyando River, Nandi District . . . Nephelinite. 



Bed of Lower Kedowa River 



I'pper waters of .. ,, 



Nyando A'alley, 10 miles west of Fort Ternan . Limestone from concretionary 



blocks in alluvial deposits over- 

 lying granite and gneiss. 



