THE DEPOSITS OF THE SEA-BOTTOM. 



45 



from Iceland. The few stones brought home, indicate, however, that the volcanic element is only little 

 conspicuous; there were n stones of sizes up to io cm , subangular, and partly ice-striated; only two of 

 them were volcanic, viz. one dark gray basalt, and one brownish tufa with well developed crystals of 

 augite. Of the rest 4 were fine-grained, gray gneiss, one common red granite, two gray, impure sand- 

 stone, one quartzite, and one phyllite. 



Station 50. According to the journal black grains of basalt. 



Station 52. One piece of dark gray basalt, ca 3 cm . 



Station 54. One piece of granite of a diameter of ca. I4 cm , subangular with a rather rough 

 surface. The nature peculiar; quite unicolorous, gray grains of quartz and feldspar without any dark 

 mineral, but with irregular, angular inclosings of some dark rock, probably basalt 



Station 64. Some clods of clay, up to I2 cm ; very irregularly shaped, pierced by deep holes, 

 probably made by animals. The colour brownish. These clods resembled much the deposit on the 

 place in question, and must accordingly have been formed by a hardening of this deposit, though it 

 is impossible to say anything of the way in which this should have taken place. The consistency of 

 the clods is for the rest very loose, and not much different from that of the clay itself; but still they 

 present themselves as outwardly well limited bodies. According to the journal a single piece of basalt 

 was also found at this station. 



Station 65. 4 stones, up to io cm , subangular, slightly ice-striated; of these one was black, 

 compact basalt, one dark gray basalt with cavities and amygdaloids; one gray biotite-gneiss, and one 

 of a rock, which, as far as discernible, consisted exclusively of white-gray plagioclase in rather large 

 grains with distinct twinning striation. Further one rather large stone (24 cm ), consisting of black basalt 

 or dolerite with a few cavities filled with stilbite. 



Station 81. 6 stones, up to 5™, rather irregular and angular. One was volcanic tufa, one red, 

 large-grained granite, one gray, vere fine-grained granite, one gray sandstone, one brown sandstone 

 with mica, and one gray-black clay-slate with mica. This compound is most peculiar seeing that the 

 specimen is situated so close to the southwest coast of Iceland. The great predominance of sandstone 

 and slate is also extraordinary, and scarcely to be accounted for, if we do not set it down as having 

 originated from the sea-bottom itself; if this be the case we should here have the only instance of 

 rocks from the ridge southwest of Iceland. 



Station 83. 6 stones, up to 7 cm , most of them almost angular; only one volcanic, viz. highly 

 vesicular, pumice-like lava; one fine-grained granite, one white, compact limestone; one quartzite, one 

 hornstone, and one loose, gray sandstone. The compound was very much like that in station 81, and 

 the same conclusions will hold good for this specimen as for the preceding one. 



Station 85. 53 smaller, and 6 larger stones; the smaller ones, up to i cm , all basalt except two 

 pieces of tufa; the larger ones, up to 6 cm , also basalt with one piece of volcanic tufa; they were sub- 

 angular, partly ice-striated. This station, thus, is situated so close to Iceland, that the Greenland ice 

 never, or only as a rare exception, reaches so far; the sea-bottom here must also be supposed to con- 

 sist exclusively of basalt. 



Station 89. One stone of a size of 8 cm consisting of black-gray basalt. 



Station 97. One piece of black basalt, i"5 cm . 



