. The geology of Nova Scotia, New Brunswick, and Prince Edward Island, or, Acadian geology [microform]. Geology; Geology, Stratigraphic; Paleontology; Geology, Economic; Géologie; Géologie stratigraphique; Paléontologie; Géologie économique. ai DEVONIAN OP NOVA SCOTIA. 499 >r dls- sandy rences ily the though ick tho and is its Fundy, in, New Bin have â with the , renders , Large cir rocks erwise of in which 3 the holt ilis valley. Is that arc the low he sequel leir dip to hard and [following ;he aspect It in loose lie Upper a Scotia, r Ilartt, 'ornulites i-Scotica, lyet seen catc
. The geology of Nova Scotia, New Brunswick, and Prince Edward Island, or, Acadian geology [microform]. Geology; Geology, Stratigraphic; Paleontology; Geology, Economic; Géologie; Géologie stratigraphique; Paléontologie; Géologie économique. ai DEVONIAN OP NOVA SCOTIA. 499 >r dls- sandy rences ily the though ick tho and is its Fundy, in, New Bin have â with the , renders , Large cir rocks erwise of in which 3 the holt ilis valley. Is that arc the low he sequel leir dip to hard and [following ;he aspect It in loose lie Upper a Scotia, r Ilartt, 'ornulites i-Scotica, lyet seen catc that [⢠Arisaig jioticed. thickness â oxide of iron, with dark coloured coarse slates, dipping S. 30° E. at a very high angle. The iron ore is from 3 to A^ feet in thickness. Tho fossils of the irun-tone and the accompanying beds, as far as they can be identified, are Spirifer arenosus, Strophodonta magnijica, Atrypa unguiformis, Strophomena depressa, and species oiAiucula, liellerophon, Favosites, and Zaphrentis, etc. These Professor Hall compares with the fauna of the Oriskany sandstone; and they seem to give indubitable testimony that the Nictaux iron ore is of Lower Devonian age. The most abundant fossil is a Spirifer as yet not identified with any de- scribed species, but eminently characteristic of tho Nictaux deposits. It is usually seen only in the state of casts, and often also strangely distorted by the slaty structure of the beds. The specimens least distorted may be described as follows:âGeneral form, semi-circular tending to semi-oval, convexity moderate; hinge-lino about equal to width of shell; a rounded mesial sinus and elevation with about ton sub-angular plications on each side; a few sharp growth ridges at tho margin of the larger valves. Average diameter about one inch; mesial sinus equal in width to about three plications. I shall call this species, in the meantime, S. Nictavensis. I figure two distorted specimens (Fig. 17G), to show the
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
