The Canadian journal of industry, science and art . ially characteristic of these, the MINERALS AND GEOLOGY OF CANADA. 197 terms Birds Eye and Black River Limestone, or the latter alone,is occasionally employed in reference to the beds in question : thuspartially recognising two sub-formations, the Birds Eye and BlackRiver (united) below, and the Trenton proper, above. The strata ofthe entire group average from 600 to 700 feet, and consist almcstwholly of limestones, usually of a grey or black colour, and moreor less bituminous. Here and there a bed of sandstone, rarely ex-ceeding two or three
The Canadian journal of industry, science and art . ially characteristic of these, the MINERALS AND GEOLOGY OF CANADA. 197 terms Birds Eye and Black River Limestone, or the latter alone,is occasionally employed in reference to the beds in question : thuspartially recognising two sub-formations, the Birds Eye and BlackRiver (united) below, and the Trenton proper, above. The strata ofthe entire group average from 600 to 700 feet, and consist almcstwholly of limestones, usually of a grey or black colour, and moreor less bituminous. Here and there a bed of sandstone, rarely ex-ceeding two or three feet in thickness, and a thin seam of calcareousclay, may occur amongst the series; but limestone rocks essentiallycharacterize the formation. Some of these are thick, and others thin-bedded, the latter passing into limestone shales. Fossils are exceed-ingly abundant in most of these beds. Those more especially charac-teristic of the lower sub-division, comprise:—Tetradium fihratum(fig. 167), Columnaria alveolata (fig. 168), Stromatopora rugosa.
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Keywords: ., bookcentury1800, bookdecade1850, bookpublishertoron, bookyear1856
