46 THE DEPTH AND MARINE DEPOSITS OF THE PACIFIC OCEAN. 



Glauconite is very abundant as grains, the green color varying in intensity 

 and hue, some grains being grass green, others rather yellowish. 



Fine Washings (87.5 per cent); principally minute particles of the 

 minerals above mentioned, which passed away with the clayey matter, with 

 a few fragmentary Diatoms and Sponge spicules and fine flocculent clayey 

 matter colored green by the adjunction of the green matter usually met 

 with in Green Muds and Sands. 



No. 8. Station 4658, 14th November, 1904. 

 Lat. 8. 29.5' S. ; long. 85° 35.6' W. ; depth, 2370 fathoms. 



RED CLAY : gray, sticky, plastic, fine-grained, very smooth to the touch ; 

 dries into very hard lumps slightly reddish in tinge. The clay proper is 

 quite homogeneous, but contained many manganese nodules, sharks' teeth, 

 and cetacean ear-bones. 



Calcium carbonate : per cent. 

 Residue : 100 per cent : — 



Siliceous Organisms (0.5 per cent), many different genera of arenaceous 

 Foraminifera are present, including Haplophragmium ; also a few Sponge 

 spicules and Diatoms. 



Minerals (4 per cent) ; not taking into account the broken fragments of 

 manganese nodules, the mineral particles consist mostly of small grains (0.5 

 mm. in diameter) of the oxides of iron and manganese, together with a very 

 few particles of plagioclase, augite, magnetite, and hematite. 



Fine Washings (95.5 per cent) ; principally a dark gray amorphous clay, 

 with a few microscopic mineral particles not determinable, and a few 

 Diatoms. 



No. 9. Station 4666, 18th November, 1904. 

 Lat. 11° 55.5' S. ; long. 84° 20.3' W. ; depth, 2600 fathoms. 



RED CLAY : gray, typically clayey, plastic, sticky, smooth to the touch, 

 drying into hard lumps. 



Calcium carbonate : traces. Acid caused effervescence in one or two 

 spots only. A pelagic Foraminifer was detected, and unrecognizable tabular 

 fragments. 



Residue : 100 per cent : — 



Siliceous Organisms (1 per cent), principally Sponge spicules, with 

 Radiolaria and arenaceous Foraminifera. 



