253 



thickness, which is here given, is only about 

 half as great as the figure assigned by Robb 



to the same beds 600 ft. 



183 m.) 

 The following members of the Windsor series 

 arranged in descending order, can be distin- 

 guished : — 



a. Oolitic marine limestones with red shales 

 and coarse sandstones. The limestones are 

 marine but with a limited fauna. Thickness 



about 211 ft. 



(64-3 m.) 



b. Reddish shales, sandstones and conglomerate 

 with beds of limestone which carry a fauna 

 almost wholly of ostracods; only a few small 

 marine lamellibranchs and gastropods are 

 present. Thickness about 188 ft. 



(57-3 m.) 



c. Sandy shales, sandstone and conglomerate, 

 predominantly red, with at least four marine 

 limestones, not well shown. Thickness esti- 

 mated at about 200 ft. 



(61 m.) 

 Age uncertain, probably Mississippian, formerly 

 considered the lower part of the Sub-Carboni- 

 ferous ^^ Limestone series.'' 

 Red and purple sandy shales, sandstones and 

 conglomerates all loosely coherent, with occa- 

 sional thin beds of barren limestone. Pebbles 

 up to several inches in diameter are present 

 but they are, on the whole, not as coarse as 

 in the formation next below. This formation 

 was included by Fletcher in his "Sub- 

 Carboniferous Limestone series" because of 

 the presence of an occasional limestone bed. 

 These are not known to carry fossils. The 

 thickness given by Robb, which is here 



adopted, is probably much too large 2,633 ft. 



(802-5 m.) 

 Carboniferous Conglomerate series. — This was 

 so called by Fletcher but its age is 

 unknown. It consists of red and purplish 

 conglomerates, differing mostly from the 

 overlying beds in their greater coarseness. 



