| Abstract |
On the 2nd February, the day after leaving Kerguelen Island, the weather in the forenoon being fine and clear, a successful sounding and dredging were obtained in 150 fathoms, on a hard bottom (Station 150). The bottom was covered with a coarse gravel; the dredge brought up a large number of stones, fragments of rocks of irregular form, varying in size from 1 to 7 centimetres in diameter, with the angles more or less rounded, but much less so than those of ordinary rolled pebbles. They were blue-black, and the majority had a compact structure and were fine grained, while others were porous with a rough surface. Macroscopically they appeared to be basalts or basaltic lavas, but examined with the microscope it was seen that they belonged to the felspathic basalts (dolerite); among these volcanic fragments were noticed two or three pieces of granite and one of sandstone. The majority of these stones were overgrown by Foraminifera, Sponges, Actiniaria, Brachiopods, Ascidians, Serpulce, and Polyzoa. [NOT CONTROLLED OCR] |
