THE DEPOSITS OF THE SEA-BOTTOM. 



33 



of volcanic nature, viz. black, compact basalt, olivine, black, vesicular glass, light pumice; 

 red, porous basalt. Further a few grains of quartz. 



Station 125. North of Iceland; Transition clay; 0-04 per ct. Almost exclusively volcanic; the chief 

 mass was black, more or less porous basalt, besides olivine, augite, colourless or slightly 

 brown, vesicular glass, black, vesicular glass. Further a few grains of quartz. 



Station 126. North of Iceland; Gray deep-sea day; 0-05 per ct. Almost exclusively volcanic, chiefly 

 black, vesicular glass; further black, compact basalt, colourless, vesicular glass and gray tufa. 

 A few grains of quartz. 



Station 127. North of Iceland; deposit from more shallow water; gravel. The percentage not deter- 

 mined, very large, ca. 90. Among the largest grains, over 5 mm in diameter, the volcanic 

 ingredients were so completely predominant, that among 145 grains only one was not vol- 

 canic, it being quartz ; the others were of a rather homogeneous nature ; 97 were gray-black, 

 fine-grained or compact basalt, 50 black, fine-grained or compact basalt, n gray-green, fine- 

 grained or compact basalt, 2 black, vesicular glass, 2 light gray basalt. All the pieces 

 were rounded, and coated with a dark crust; in a few of the grains of basalt were found 

 grains of feldspar, augite or olivine; very few of them had cavities or amygdaloids. Among 

 the smaller grains the same ingredients were found, the quartz, however, being somewhat 

 more prominent; a few amygdaloids of chalcedony were seen. 



Station 128. North of Iceland; Gray deep-sea clay; o-n per ct. Chiefly volcanic, viz. 9 grains of 

 black basalt, one of red basalt, 3 grains of quartz. 



Station 129. Northwest of Iceland, Transition clay; 0-04 per ct. The only things found were some 

 small plates of colourless glass. 



Station 138. North of the Faroe Islands; Gray deep-sea clay; 0-23 per ct. Chiefly not volcanic, viz. 

 quartz and some feldspar; about one fcmrth volcanic, consisting of black, shining, volcanic 

 glass, black, compact basalt, plagioclase, and colourless glass. 



Station 139. North of the Faroe Islands; Transition clay; 0-02 per ct. 12 small grains, viz. n grains 

 of quartz, and one of black basalt 



Station 140. North of the Faroe Islands; Transition clay; 0-05 per ct. 5 pieces of black basalt. 



Station 141. North of the Faroe Islands; Gray deep-sea clay; 076 per ct Far the greater part not 

 volcanic, being quartz, feldspar, and dark mica; of volcanic material: black or gray basalt, 

 black, volcanic glass, olivine. 



Station 143. North of the Faroe Islands; Gray deep-sea clay; 31-38 per ct. Of the larger grains, over 

 2 mm , not a single one was of volcanic origin; they consisted of: 17 pieces of a compact or 

 fine-grained rock, rich in quartz, granulite, halleflinte , or quartzite, of gray, black-gray, or 

 red-gray colour; 4 pieces of black or black-gray clay-slate, 4 of gray or red-gray, rather hard 

 sandstone, 3 of quartz + red feldspar (granite or gneiss), 2 of opaque, grayish quartz, one of 

 loose sandstone, one of phyllite, one of clear, colourless quartz. In the smaller grains the 

 same ingredients were found; but here the quartz was most prominent of all. Further was 

 found: red garnet, biotite, and muscovite, and of volcanic material gray pumice, black, 

 shining, vesicular glass, olivine and augite. 



The Ingolf-Expedition. I. 3. 





