3oo 



DISCOVERY REPORTS 

 The classification adopted for the Discovery samples may be tabulated as follows: 



Table II 



Shallow-water deposits, be- 

 tween low water mark and 

 ioo fathoms deep 



Deep-sea deposits, from 

 depths greater than ioo 

 fathoms 



Gravels 

 Sands 

 Muds 



Glauconitic mud 

 Diatomaceous mud 

 Diatom ooze 

 Globigerina ooze 

 Radiolarian ooze 



Terrigenous deposits, con- 

 V taining detrital material 

 derived from land masses 



Pelagic deposits, of organic 

 origin, formed outside the 

 range of detritus-bearing 

 currents 



GENERAL DISTRIBUTION OF THE DEPOSITS 



SOUTH ATLANTIC REGION (Plate XVII) 



This region is represented by fifty-nine samples from numbered stations as indicated 

 in Table III. In addition, eight samples from other localities (indicated by letters) are 

 included, of which five (A, B, C, D, E) are from stations situated north of the area 

 covered by Plate XVII. The sixty-seven samples may be classified thus: 



Table III 



Globigerina ooze 



Radiolarian ooze 

 Diatom ooze 

 Diatomaceous mud 



Glauconitic mud 

 Terrigenous mud 

 Sand 



Locality numbers in Station List 



R.R.S. 'Discovery' 



A,B,C,D,E,8,9,6 4 ,78,83, 

 84,89 



71.74.77, i l6 5 

 F, G, 10, 11, 12 

 63, 117, 162, 167, 169, 212 



J 



160, 235, 236, 237, 363, 366 



R.S.S. 'William Scoresby' 



128, 129, 520, 521, 522 



255- 374. 377. 429 



201, 202, 203, 204, 205, 403, 

 428, 468, 469, 470, 471, 472, 

 474. S 2 4. 526, 7 68 



433. Si8 



314,317,319,381,406,525 



Globigerina ooze is the most widespread deposit accumulating in the vast region 

 covered by the South Atlantic Ocean, and all the localities here recorded fall within the 

 area shown for Globigerina ooze on the map appended to the Challenger Report. The 

 majority lie in the main area to the north of lat. 46 S, but four of them appear somewhat 

 isolated in the Discovery records. The most westerly occurrence is at St. 64, to the north- 

 east of the Falkland Islands; the deposit is hardly typical Globigerina ooze, but the 

 locality is near the line drawn by Murray west of the South American coast, to separate 



