27 
A conspicuous hill in the watershed of Monkey Creek**, shows 
a beautiful example of a dolerite sill resting on indurated shales, 
with the cover overlying the dolerite removed by denudation. 
Occasionally an effect of the igneous intrusion in arching up the 
overlying strata may be noticed, an excellent instance of which is 
to be seen in Fig. 31) here the intrusion is laccolitic in character, 
Fig. 30- 
Dolerite Sill, restin'.^ nn Shales, Monkey Creek. 
Fig. 31. 
Sill in Sedimentary Rocks. 
** Lands Dept. Litho. S0/30(). 
