242 H. S. Summers: 



At the southern end of allotment 69, Parish of Moorngag, and 

 overlooking Samaria Creek valley, is a splendid outcrop of 

 metamorphio rocks. These rocks are mainly gi-ey and white 

 cherts, in which the silicification has not been quite so intense 

 as in other localities. The bedding is very distinct, and as the 

 beds are exposed in an almost vertical face nearly 40 ft. high, 

 the dip and strike are easily obtainable. The strike of the 

 beds is N. 70 deg. W., and the dip N. 20 deg. E., at an angle 

 varying between 35 deg. and iO deg. 



Proceeding up the hill above these beds one passes over less 

 silicified beds until at the top of the rise micaceous sandstones 

 and indurated shales, which are no more altered than the 

 ordinary Ordovician and Silurian sediments found in the neigh- 

 bom'hood of igneous rocks, seem to overlie the cherts perfectly 

 conformably, the strike and dip of these beds being almost iden- 

 tical with that seen in the cherts. 



In allotment 68 we have more evidence that the chei'ts and 

 sandstones form one series. Near the southern fence of this 

 block beds of micaceous sandstones are exposed, and they are 

 seen to be almost vertical and to strike N. 30 deg. E. Twenty- 

 two yards to the south of the sandstones are beds of cherts 

 which agree exactly both in strike and dip with the sandstones. 

 About 100 yds. still further to the south, in allotment 67, 

 more sandstones are found. These beds are also nearly vertical, 

 and the strike is N. 25 deg. E. There seems little dotibt, there- 

 fore, that at this point the cherts and sandstones are inter- 

 bedded, and consequently belong to the same horizon. 



On Mr. Hewitt's sketch map a sharp junction is shown be- 

 tween the Heathcotiaii (?) cherts and beds marked in as of 

 Silurian age. These so-called Silurian beds at first sight seem 

 entirely distinct from the cherly rocks, typical specimens from 

 the two series showing no similarity to one another. As Mr. 

 Hewitt's time was extremely limited, he had no opportunity 

 to examine the junction, as shown on the map, and consequently 

 sketched in an approximate boundary between the two types of 

 sediments. When one comes to examine the rocks near the 

 supposed junction, it is found impossible to separate the two 

 series, as they merge gradually into one another. Passing from 

 the fairly normal sediments, wliich consist of shales and sand- 

 stones, the shales being nuicli more in evidence than the sand- 



