. Acadian geology : the geological structure, organic remains, and mineral resources of Nova Scotia, New Brunswick, and Prince Edward Island. Geology -- New Brunswick; Geology -- Nova Scotia; Geology -- Prince Edward Island; Paleontology -- New Brunswick; Paleontology -- Nova Scotia; Paleontology -- Prince Edward Island. DEVONIAN OF NOVA SCOTIA. 499 iron, with dark coloured coarse slates, difipiiig S. 30° E. at a very high angle. The iron ore is from 3 to 4^ feet in thickness. The fossils of the ironstone and the accompanying beds, as far as they can be identified, arc Spirifcr arenosus, titro
. Acadian geology : the geological structure, organic remains, and mineral resources of Nova Scotia, New Brunswick, and Prince Edward Island. Geology -- New Brunswick; Geology -- Nova Scotia; Geology -- Prince Edward Island; Paleontology -- New Brunswick; Paleontology -- Nova Scotia; Paleontology -- Prince Edward Island. DEVONIAN OF NOVA SCOTIA. 499 iron, with dark coloured coarse slates, difipiiig S. 30° E. at a very high angle. The iron ore is from 3 to 4^ feet in thickness. The fossils of the ironstone and the accompanying beds, as far as they can be identified, arc Spirifcr arenosus, titrop/iodonta magnifica, Atrypa ungtiiforinis, Strophomena depressa, and species o( Avicidci, Bellcmphon^ Favosites, and , etc. Tiiese 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 Spirifcr as yet not identified with any de- scribed species, but eminently characteristic of the 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:—General form, semi-circular tending to semi-oval, convexity moderate ; hinge-line about erpial to width of shell; a rounded mesial sinus and elevation with about ten sub-angular plications on each side; a few sharp growth ridges at the 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'. Nlctavensis. I figure two distorted specimens (Fig. 176), to show the remarkable differences of form produced in this way. The original form is inter- mediate. Fig. 17G.—Sjiirifcr (n) Shortened, and {h) lengthened, by distortion, in the direction of tlie arrow. To the southward of the ore, the country exhibits a succession of ridges of slate holding
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Keywords: ., bookauthordawsonjohnwilliamsir1, bookcentury1800, bookdecade1870
