I8Q2.] 
509 
[Crosby. 
have seen, a steep monocline in its southwestern extension ; but east 
of Huit’s Cove Lane an entirely different type of structure prevails, 
the dips of both the melaphyr and sedimentary rocks being every- 
where low and indicating a broad southerly monocline of con- 
glomerate and sandstone, bordered on the south by an equally 
broad and shallow syncline of melaphyr and overlying conglom- 
erate. The extension of these melaphyr belts eastward to the 
shore appears to be justified by the numerous boulders of very 
similar melaphyr on Button Island. 
The curving monocline north of the great dike is continued 
eastward in Ragged, Sarah, and Langlee Islands. The Chores of 
these islets are almost continuous exposures, and the attitude of 
the strata — conglomerate and sandstone — is exceedingly constant, 
the strike being nearly due east-west and the dip south 35°-40°. 
Ragged Island is separated from the other two by a transverse 
fault which downthrows to the east, causing a horizontal dis- 
placement of about 100 feet. This fault is repeated between 
Rasped Island and Melville Garden, with a shift of about 150 
©o 
feet. In correlating the islands with the ledges in the Garden, it 
is necessary to regard the outer part of Walton’s Cove as equiva- 
lent to the gap existing between both Ragged and Sarah Islands 
and the ledges parallel with their southern shores. 
Although there are no reversed dips, a general view of the 
section from Melville Garden west across the alternating strata 
suggests that the main band of slate marks a synclinal axis, and 
the section was constructed in accordance with that idea. A re- 
cent review and comparison of all the facts have satisfied me, 
however, that a monoclinal structure is more probable. This sec- 
tion bears a general resemblance to the Village and Beal’s Cove 
sections ; but the precise correlation of the beds is a puzzling prob- 
lem. The only reasonably safe clue is afforded by the main bed 
of slate, which, it appears, should be correlated with the thick 
bed of red and gray slate in the Village section. 
That the contacts between the melaphyr east of Huit’s Cove 
and the sedimentary rocks bounding it on the west and north are 
lines of profound displacement is unquestionable, unless we are 
prepared to regard the melaphyr as intrusive in the slate and 
conglomerate, that is, as forming a vast dike or laccolite ; a view 
which, it may be stated once more, finds no support whatever in 
the petrographic characters of the melaphyr, nor in any facts 
