DETAILED DESCRIPTIONS OF THE "MICHAEL SARS" DEPOSIT-SAMPLES. 



Square brackets [ | arc used to indicate percentages arrived at by inspection; 

 parentheses ( ) are used to indicate percentages which are the result of chemical 



analysis. 



"Michael Sars" Station 1. 9th April, 1910. 

 Lat. 49' 27' N., Long. 8 36' W.; Depth— 157 m. (86 fms.) 



BLUE MUD: greenish-grey when wet, light grey with 

 greenish tinge when dry, slightly coherent. 

 CALCIUM CARBONATE (40 per Cent.]: — one or two 

 small pelagic Foraminifera, bottom-living Fora- 

 minifera, Mollusc fragments, Echinoid shell frag- 

 ments and spines, Polyzoa, Crustacean claw 

 fragments, Ostracods, coccoliths. ■ 

 RESIDUE [60 per cent.], green: — 



Siliceous Organisms [3 per cent.]; Sponge 



spicules, Radiolaria, Diatoms. 

 Minerals (25 per cent.]; m.di. 0-14 mm., roun- 

 ded, quartz, felspar, mica, a few glauconitic 

 grains. 

 Fine Washings (32 per cent.]; amorphous 

 clayey matter with minute mineral particles. 



"Michael Sars" Station 4. lUtli April, 1910. 

 Lat. 49' 27' N., Long. 8 36' W.; Depth— 1000 m. (547 fms.). 



GLOBIGERINA OOZE: dirty grey when wet, light grey 

 when dry, coherent, granular; not typical be- 

 cause of the abundance and variety of bottom- 

 living Foraminifera. 

 CALCIUM CARBONATE (70 per Cent.]:— Pelagic Fora- 

 minifera [40 per cent.]: Orbulina, Globigerina, 

 Pulvinulina mostly of small size; bottom- 

 living Foraminifera (25 per cent.]: Biloculina, 

 Uvigerina very abundant, Miliolina, Rotalia, 

 etc.; other organisms (5 per cent.]: Pteropod 

 fragments, Echinoid shell fragments and spines, 

 Gasteropod and Lamellibranch fragments, 

 Ostracods, coccoliths, one or two coccospheres. 

 RESIDUE [30 per cent.], brown : — 



Siliceous Organisms [3 per cent.] ; arenaceous 



Foraminifera (abundant), Radiolaria, one or 



two Diatoms, imperfect casts. 

 Minerals [15 per cent.]; m.di. 012 mm., mostly 



rounded, quartz, mica, magnetite, felspar. 

 Fine Washings [12 per cent.] ; amorphous clayey 



matter with minute mineral particles. 



From this station Dr. Peach records a piece of coal 

 briquette, three clinker fragments, and small piece of coal, 

 all evidently fallen overboard from ships. 



.Michael Sars' Station 10. 19th to 21st April, 1910. 

 Lat. 45 26' N., Long. 9° 20' W. (Bay of Biscay); Depth— 4700 m. 



(2567 fms.). 



GLOBIGERINA OOZE: fawn colour, finely granular, 



coherent. 

 CALCIUM CARBONATE (66-11 percent.): — Pelagic and 



bottom-living Foraminifera, Echinoid spines, 



Ostracods, Pteropod fragments, one or two 



coccospheres, many coccoliths. 

 RESIDUE (33.89 per cent.): — 



Siliceous Organisms [1 per cent.]; arenaceous 

 Foraminifera, Radiolaria, Diatoms. 



Minerals (1 per cent.]; angular and rounded, 

 m.di. 0.12 mm., quartz, acid plagioclase, 

 hornblende, olivine, magnetite, biotite, a frag- 

 mentof volcanic glass with minute micro- 

 liths, fragments of rocks about 1 mm. in 

 diameter, a decomposed ferruginous mineral. 



Fine Washings [31.89 per cent.]; amorphous 

 clayey matter with minute particles of minerals. 



Note: The sounding-tube at this station sank into 

 the deposit to the depth of 12 cm. or nearly 5 inches. 

 The upper portion of the sample to the depth of about 

 3 inches was of a uniform fawn colour and represented 

 apparently an ordinary Globigerina Ooze with 66 per 

 cent, of calcium carbonate, whereas the lower one or two 

 inches had a mottled appearance with light and dark 

 brown patches, being here and there almost pure white 

 in colour and quite chalky. A rough attempt to analyse 

 a little of the white material gave 70 per cent, of calcium 

 carbonate, but the white material could not be separated 

 from a certain proportion of the brown material. A 

 sufficient quantity of the dark brown material was separated 

 and gave on analysis 33 per cent, of calcium carbonate. 

 Apart from these variations in the amount of calcium 

 carbonate, microscopic analysis showed very little difference 

 between the differently coloured portions of the sample. 

 The detailed description above, therefore, deals only with 

 the upper homogeneous portion of the roll from the 

 sounding-lube. In addition to the material from the 

 sounding-tube the trawl brought up a large bag full of 

 Globigerina Ooze like the upper portion of the roll already 

 described. From this source small pebbles were washed out. 



