818 



THE ATLANTIC. 



[chap. v. 



A red clay, containing mucli amorphous clayey matter, and many fine 



mineral particles — mica, quartz, feldspar, magnetite, and augite. A few 



pelagic foraminifera, entire and broken ; a few arenaceous foraminifera. 



No. 6.— Station IX. February 26tli. Lat. 23° 23' N., Long. 35° 10' 

 W. Depth, 3150 fathoms. Bottom temperature, 1°*9 C. Chemical 

 composition : 



Loss on ignition after drying at 230° F 10-40 



' Alumina 8'30 



Ferric oxide 9'75 



I'ortion soluble in Calcium phosphate Good traces 



hydrochloric acid -{ Calcium sulphate 0'87 



= 43'74. 



Portion insoluble 



in hydrochloric 



acid =45-86. 



Calcium carbonate 3-11 



Magnesium carbonate 1-90 



(^ Silica 19-81 



f Alumina 9-10 



Ferric oxide 2-04 



Lime 047 



Magnesia 0-95 



Silica 33-30 



100-00 



A red clay, containing much amorphous clayey matter, many parti- 

 cles of mica, magnetite, quartz, and hornblende. Some of the larger 

 particles were rounded. A very few broken portions of pelagic fo- 

 raminifera occurred, and a few arenaceous forms. 



No. v.— Station X. February 28th. Lat. 23° 10' N., Long. 38° 42' 

 W. Depth, 2720 fathoms. Bottom temperature, 1°*9 C. Chemical 

 composition : 



Loss on ignition after drying at 230° F 7-61 



' Alumina 973 



Ferric oxide 9'30 



Portion soluble in Calcium phosphate 



hydrochloric acid ^ Calcium sulphate 0-61 



Calcium carbonate 13-30 



Magnesium carbonate 1-31 



[ SiHca 24-73 



Alumina 5-50 



Ferric oxide 2-96 



Lime 0-23 



Magnesia 0-19 



SiHca 24-53 



= 58-98. 



Portion insoluble 



in hydrochloric 



acid ==33-41. 



100-00 



