THE QUIZZYHOTA LACCOLITE ha 
readily splits up along joints when exposed on the surface, and even 
the fresh face on the west, where it is exposed above the sedimentary 
beds, has scaled to a depth of some to feet or so; and the slopes 
below are covered with scree formed of the fallen blocks. 
Along the Etanga Valley the dolerite comes toward the Kei 
River with a covering of 100 feet of sediments, then just below 
the farmhouse, on top, the dolerite breaks through to a higher 
horizon; at the western end there remains a covering of sedimentary 
CAP OF 
SEDIMENTARY 
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fase JINENT RIB 
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- JOINTED® poLeRITE 
3° MARGIN 
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OF DOLERITE een 
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Fic. 3.—Western end of the Quizzyhota laccolite. 
beds of about 30 feet thick, but on the Quizzyhota Hill the dolerite 
apparently reaches the summit. ‘The line of demarkation where 
the dolerite impinges on the sedimentary rocks is exposed with 
extraordinary clearness on the krantz. The length of the laccolite 
along the river is cut twice by short valleys; the easternmost is 
the Etanga Valley, which is a deep fjord-like gorge that runs into 
the dolerite, doubtless along lines of original fracture which have 
been worked out by weathering. The valley forks into two 
branches about half a mile from the entrance. One of the branches 
