1885.] Report on the Deposits of the Nile Delta. 223 



subangular grains. Consists of the usual minerals, but mica (biotite) 

 in thin brown plates occurs in tolerable abundance. 

 Mud. — Presenting the usual characters. 



Sample 3. Depth, 11 ft. 



Pale coloured, very sandy loam. Consists of 50*99 per cent, sand, 

 49*01 per cent. mud. 



Sand. — Mostly angular or subangular, with a few well-rounded 

 grains. The usual minerals, with smoky quartz, tourmaline, and 

 sphene (?). Fragments of silicified wood. 



Mud, — Presents the usual characters. 



Sample 4. Depth, 19 ft. 



Coarse sand of ash-grey colour. Consists of 87*41 per cent, sand, 

 and 12*59 per cent. mud. 



Sand.—Fov the most part made up of large, well-rounded grains, 

 nearly all of which are colourless quartz (granitic), with a few of 

 jasper and felspar (including orthoclase, microcline, and plagioclase). 

 Also a few calcareous concretions. The smaller sand grains are some- 

 times angular, and sometimes subangular ; they consist of the usual 

 minerals, including both hornblende and mica. 



Mud. — Consists almost entirely of inorganic particles. 



Sample 5. Depth, 26 ft. 



Very coarse, nearly white sand. Consists of 90*19 per cent, sand, 

 9*81 per cent. mud. 



Sand. — The coarser grains are nearly all well-rounded, and are, in 

 fact, converted into beautiful pebbles. These larger grains are 

 usually quartz (granitic), but well-rounded fragments of hornblende 

 and felspar also occur, with red, yellow, and brown jasper by no 

 means rarely. The smaller grains, which are usually angular. or sub- 

 angular, include a greater variety of materials. 



Mud. — Composed almost wholly of mineral particles. 



Sample 6. Depth, 35 ft. 



Sand similar to last, but finer grained. Consists of 86*42 per cent, 

 sand, 13*58 per cent. mud. 



Sand. — The coarser particles usually well-rounded and composed of 

 quartz (granitic), with numerous and large liquid inclusions, with a 

 little felspar and hornblende. There occurred in this sample a 

 calcareous fragment which appeared to be the nucleus of an Ammonites 

 (Jurassic ?). The finer sand, which is angular or subangular, consists 

 of the usual minerals, the quartz of metamorphic rocks being 

 commoner than is usually the case. 



Mud. — Of usual character. 



VOL. XXXIX. Q 



