Geology.] 
NATURAL HISTORY. 
617 
dish-grey quartzose sandstone, with traces of a slaty struc- 
ture, resembling that of York Sound, and Cambridge Gulf, 
was found in the north-east end of this bay; and fine- 
grained greenstone, on the summit of the adjacent hills. 
Several of these specimens are almost identical with those 
of Port Warrender; from which place Careening Bay is dis- 
tant about sixty miles. 
Bat Island, (Narr. i. p. 432,) western entrance of Careen- 
ing Bay. — Quartz from thin veins, with particles of an ad- 
hering rock, probably chlorite-slate. Quartz, containing dis- 
seminated hematitic iron~ore and copper pyrites. Quartz 
crystals, with calcedony, from nodules in amygdaloid. 
Quartz with specular iron ore. Greenstone, with calce- 
dony and copper pyrites. A decomposed stone, probably 
consisting of wacke. — The specimens of trap-rocks from this 
place are from a cavern. 
Grbville Island, near the entrance of Prince Regent's 
River. — Reddish, coarsely granular, siliceous sandstone ; in 
horizontal strata, intersected by veins of crystallized 
quartz 
Half-Way Bay, within Prince Regent’s River on the 
west of the entrance, near Greville Island. — Hornblende 
rock? nearly agreeing with that of Pobassoo’s Island, on the 
north-west of the Gulf of Carpentaria, (See above, p. 613.) 
Calcedony, apparently from nodules in amygdaloid. Green~ 
ish quartz, approaching to heliotrope. Red, somewhat slaty 
jasper, mixed with quartz and calcedony, and containing 
specular iron ore. 
The specimens from this place much resemble some of 
those from Sotto i Sassi, in the Val di Fassa in the Tyrol, 
Narrative, vol. ii. p. 53. 
