1ST] 



CYPRESS POND — MCDOUOLAS MILL. 



51 



subterranean channel in the limestone, so as to appear and disappear repeatedly. 

 Tn exploring one of these channels (which is 18 — 24 inches wide by about 3 feet 

 high) for about 20 yards, I found the rock to be solid on all sides, the roof being 

 curiously worn into cornice work, as though by the dripping of water from 

 above ; but there are no stalactites. The fetid bituminous odor of the limestone 

 pervades the air of these caves, as well as the water itself, which is, inconsequence, 

 andrinkable, and very hard besides. 



The upper strata of the limestone are of a light gray tint, crystalline, and 

 abound in fossils, especially columns of Pentremites, which appear prominently 

 on the weathered surfaces. Lower down, however, the rock assumes a black 

 tint, is almost destitute of fossils, and contains numerous small oolithic grains 

 of a somewhat ferruginous material. Both kinds of limestone, whose cleavage 

 is here generally massy, are very fetid. An analysis of the rock of the upper 

 (purer) stratum is given below (1T95). 



87. Northward of this point, also, in the same T., limestone sometimes appears 

 on the hillsides. To the southward of it, however, I know of only one locality 

 at which limestone is found viz : McDouglas' mill on the waters of Mackay's 

 Creek, S. 5, T. 6, R. 10 E. At this point we obtain, on the bluff of the mill 

 creek, the following section : 



(Sec. 2.) 



SECTION ON McDOUGLAS' MILL CREEK. 



. 2< I Orange Sand forming hilltops. 



. to 



.10 Loose cherty pebbles, or ferruginous puddingstone. 



10 Gray laminated clay, of the Eutaw Group (cretaceous). 



Gray crystalline limestone, in ledges 1 to 8 inches thick, 



>J containing Ptylopora Prouti, Sprifer (allied to Sp. 



bimesialis), Pentremites (symmetricus ?) Fenestella, 



Terebratula, etc. ; also spires of Archimedes. 



:Yellowish or reddish, hard, siliceous sandstone, in laminae 



9 %.—^% hich thick, with indistinct fossils — apparently 



heads and columns of a very large Pentremites. 



Plack, semi-indurate clay shale, charged with iron pyrites, 

 Bed of creek. 



The fossils of the limestone, No. 3 (which is in places quite soft) arc often 



