328 Transactions. 



The lowest beds I observed were about 40 ft. of much-contorted flint- 

 beds, dipping to tlie north-west. Above these the section is obscure, but 

 sandy mudstones were observed. It is possible and probable that the 

 upper limit of the flint-beds is a fault and that the sandy mudstones are 

 Clarentian. A little farther up the river, on the western bank, the main 

 exposure of the Amuri limestone series occurs. The lowest beds seen are 

 flint-beds, about 100 ft. in thickness, in beds of from 3 in. to 6 in., wuth 

 black flints with grey exteriors in the lower part and white flints with 

 hard chalky exteriors in the upper part. The upper beds are separated 

 by muddy, glauconitic partings 2-3 in. thick. From these I obtained two 

 brachiopod specimens, neither specifically determinable, although one was 

 a species of Terehratulina. The above beds were overlain by hard chalky 

 limestone with white flints, and from this specimens of Teredo were 

 obtained. To this succeeds about 10 ft. of calcareous greensandstone with 

 small pebbles and pyrite concretions. This is overlain by 12 ft. of hard 

 chalky or flinty limestone with muddy, glauconitic ])artings, and this in 

 turn is followed by another 10 ft. or thereabouts of calcareous greensand- 

 stone, greatly contorted. Then succeed upwards of 30 ft. of thin-bedded 

 alterations of chalky and marly limestone. Above this the section was 

 obscured by slips, and the chalk marls and Weka Pass stone mentioned by 

 McKay could not be observed. 



Gentle Annie Stream. — The upjier outcrop of flint-beds above described 

 in the Bluft" River can be traced across country to the Gentle Annie Stream, 

 where they are underlain by Clarentian muddy sandstones. The limestone 

 series forms a regular syncline on the north-east bank of the stream, but an 

 absolutely continuous succession cannot be observed. The fljnt-beds are 

 followed by a hard rubbly limestone, which is also probably flinty. This 

 appears to be followed by a hard glauconitic limestone about 30 ft. thick, 

 which contains in the middle a layer with rounded masses of white lime- 

 stone somewhat similar to the chalky limestone but probably concretionary. 

 The next-higher bed observed is hard chalky limestone, and this is succeeded 

 by alternations of marly and chalky limestone forming the core of the 

 syncline. 



Bluff Hill and Limestone Hill. — The sequence of beds in the Aumri 

 limestone of Bluff Hill and Limestone Hill has not been made out. The 

 extent and thickness of the outcrops make it probable that the formation 

 is of considerable thickness, perhaps comparable to that in the Mead area. 

 McKay states that calcareous sandstone and indurated fucoidal chalk- 

 greensands abounding in fossil shells form the higher and middle parts of 

 Limestone Hill. 



Herring River. — Notocene beds are thrown into a broad syncline and 

 anticline in the Herring River, but the beds above the Amuri limestone are 

 denuded from the axis of the syncline. and are exposed only on the two 

 sides of the anticline in a tributary entering the river on the left side. 

 Time permitted of the detailed examination of only two exposures. 



On the south-east side of the syncline the lower beds of the Amuri 

 limestone are seen resting on Clarentian calcareous greensandstones with 

 apparent unconformity which is probably real (fig. 6). The greensand- 

 stones dip regularly to the north-west, and are truncated above at a gentle 

 angle by a surface which has also an apparent dip to the north-west. The 

 succeeding limestone consists of marly limestone with numerous thin alterna- 

 tions of chalky limestone, which become closer together in the upper part, 

 the whole as exposed being between 50 ft. and 100 ft. thick. The lowest 



