279 
at this point, can be found on Mr. Philip Seaman's farm, ad- 
joining the Willunga main road, with a quarry on Section 
102, where the stone is a massive, blue, calcareous shale, 
slightly banded and penetrated with veins of white calcite. 
The dip is here 15? south-west. Following down the creek, 
in the sides of which the quarry is situated, at a distance of 
three-quarters of a mile (in Section 122), near a grove of 
almond trees, the limestone has again been slightly quarried 
for building purposes. The general dip is like the preceding 
one, 15? south-west, but the quarry face shows a sharp 
monoclinal fold, which throws the beds down, for a distance 
of about three feet, at an angle of 45^, when they again 
resume the lower angle of dip. 
About half a mile lower down the creek (Section 131) the 
western limits of the calcareous belt is clearly defined by the 
junction of massive quartzites and purple slates, seen in 
Pedlar’s Creek. From Pedlar's Creek the beds become more 
shaley, and are exposed in rough, serrated outcrops, the 
strike having a south-westerly trend, and no evidence of good 
limestone across their strike. About half a mile from the 
creek, folowing the strike, they pass under deep cultivated 
ground and sandy country, but pieces of travertine can be 
seen in the soil in the direction of the strike, for about a 
mile, or even more, from the last occurrence of the rock 
m situ. 
The caleareous series, including both the good limestone 
and impure calcareous beds, gradually decrease in breadth in 
their southerly extension from the Onkaparinga, until in 
Section 170, a distance of five and a half miles south of the 
river, they are only a few hundreds of yards wide, and are 
also more earthy in composition, features which seem to indi- 
cate that the calcareous beds may die out in their south- 
westerly strike. 
DESCRIPTIONS OF PLATES. 
PLATE XXXVII. 
Great anticlinal fold in earthy, siliceous limestones. Field 
River. Height of face, about 150 ft. 
PLAIN XXXVIII. 
Thin quartzite beds in purple slates, showing inverted fold. 
Field River. 
PLATE XXXIX. 
Greatly contorted purple slates and thin quartzites. Curlew 
Point (north side), Gulf St. Vincent. 
Puate XL. 
A nearer view of part of the preceding section at Curlew Point 
(north side). 
