1867.] HARTT — ON CARBONIFEROUS LIMESTONES. 217 



(or Retepora), both of which are not found in the other beds. 

 In Dr. Dawson's collection there is a large Orthoceras and a 

 Bellerophon from Kennetcook. The Kennetcook limestone is 

 quarried for building purposes, and the library of King's College 

 at Windsor is partially built of it. From this limestone Professor 

 How has collected many of these fossils. A fucoid occurs quite 

 abundantly in some of the layers at Kennetcook, but I have never 

 detected it at Windsor. 



These same beds appear low down on the shore, but badly 

 exposed, owing to the loose material encumbering the surface. 

 The same limestones, bearing the same fossils, are exposed at 

 Lower Stewiacke, on the Stewiacke River, near the house of Mr. 

 Jacob Stevens, where it has a strike of N. 50 ° E., and a dip of 

 45 ° S.W. This bed is so well characterized, both faunally and 

 lithologically, and has an extension over so large an area, that it 

 seems to merit a special name, and I would propose for it the 

 name of Kennetcook Limestone. 



Continuing our examination of the bluff still farther southward 

 from the fault last described, we find the rocks so disintegrated 

 and stratification so obscured by the falling of rubbish over its 

 sloping face, that little else can be ascertained except the presence 

 of beds of marly sandstone and limestone from the oblique lines 

 seen on the face of the bluff. About one hundred yards beyond 

 the fault occurs a bed of snowy white gypsum, containing stellar 

 crystals of Selenite disseminated through it, which, being of a 

 brownish tinge, are very conspicuous on the weathered surfaces. 

 This gypsum was formerly quarried at this point for exportation. 

 If we cross the hill in the line of strike of the bed, we reach, at a 

 short distance from the river, the principal quarry of this vicinity 

 excavated in this same bed, which is here about thirty feet iii 

 thickness, with a strike of E. 35 ° JNL, and a dip of 1 5 ° to 30 ° 

 to the southward. The excavation made in quarrying the gypsum 

 is some thirty feet deep, one hundred feet wide, and five hundred 

 feet long. The bed does not seem to be very regular, and it 

 appears to be considerably contorted. 



Returning to the river side, we find the section fails from the 

 gypsum bed, and it is not until we reach a fence, where the shore 

 bends eastward, that we meet with any exposure of rock of any 

 interest. Here there is an irregular mass of limestone of a 

 brownish color, exceedingly rich in fossils, being almost wholly 

 made up of shells. These are often empty, so as to give the rocks 



