. La geologia della Nova Scotia, del New Brunswick e del Prince Edward Island o, Acadian geologia [microformati]. Geologia; Geologia stratigrafica; Paleontologia, Geologia, economico; Géologie; Géologie stratigraphique; Paléontologie; Géologie économique. 5 s S 52 87 00 00 26 13 08 24162 04 13 27583 06 09 36 14 15 49 01 15 0 15 14 0 17 23 02 30963 30673 00 r-l 00 i-H 00 Â"o CO CO Â"£> Â"0 totali .... Totali per il 1867 . NEW BRUNSWICK ACADIAN GRUPPO. 2. Stlurtan inferiore della riva sud del New Brunswick.âThe Acadian gruppo. La città di San Giovanni sorge sui bordi che affiora in superficie di un nastro di spessore della doga duro

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. 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. 5 s S 52 87 00 00 26 13 08 24162 04 13 27583 06 09 36 14 15 49 01 15 0 15 14 0 17 23 30963 02 30673 00 r-l 00 i-H 00 »o CO CO «£> «0 Totals .... Totals for 1867 . NEW BRUNSWICK ACADIAN GROUP. 2. Lower Stlurtan of the south shore of New Brunswick.âThe Acadian group. The city of St John stands on the outcropping edges of a thick band of hard slaty rocks underlying the Devonian beds, which appear at the southern end of the city. These St John rocks were until recently of uncertain age. Believing them to underlie conformably the last-mentioned series, I had supposed them to be Lower Devonian or Upper Silurian, but Mr Matthew has ascertained that they are really unconformable to the overlying formation; and more recently the discovery of fossils by that gentleman and Mr Hartt in the lower part of the series has set the question at rest. The general character of the formation it* thus given by Mr Matthew:â" It consists of a gray clay slate often sandy, the layers of which present glistening surfaces, owing to the abundance of minute spangles of mica. This rock very frequently becomes very fine in lamination and texture, and dark in colour. Four thick bands of this kind occur, the uppermost of which is a black papyraceous shale. The three bands of coarser shale which alternate with them include nu- merous layers of a fine compact gray sandstone, from a few inches to ten feet or more in thickness; a few are so highly calcareous as to become almost limestones. The surfaces of the layers in the coarser beds are frequently covered with worm-burrows, ripple marks, shrinkage cracks or scratchesâapparently made by creatures gliding through the shallow waters in which they were deposited, and other evidenc

Parole chiave associate all'immagine

• bookcentury1800
• booksubjectgeology
• booksubjectpaleontology
• bubo