. Acadian geology [microform] : the geological structure, organic remains and mineral resources of Nova Scotia, New Brunswick and Prince Edward Island. Geology; Paleontology; Geology; Geology; Geologie; Paléontologie; Géologie; Géologie. BLOMIDON TO nRIAK ISLAND. 93 f Com- 1- Kent- omiclon p, rests ing to a system, long tlie Istonc is Lvd gray beds of place to icparated •'s Point, onnvallis ^y River, ) support her fossil nd Iicre tliey I tliey are Idcr clay, d this, in red sand- rocks dip rcmity, of is. Is upon it, or giving c trap at ns, is an over and s gently it there is li beneath m w
. Acadian geology [microform] : the geological structure, organic remains and mineral resources of Nova Scotia, New Brunswick and Prince Edward Island. Geology; Paleontology; Geology; Geology; Geologie; Paléontologie; Géologie; Géologie. BLOMIDON TO nRIAK ISLAND. 93 f Com- 1- Kent- omiclon p, rests ing to a system, long tlie Istonc is Lvd gray beds of place to icparated •'s Point, onnvallis ^y River, ) support her fossil nd Iicre tliey I tliey are Idcr clay, d this, in red sand- rocks dip rcmity, of is. Is upon it, or giving c trap at ns, is an over and s gently it there is li beneath m which |of which ipe Split. |e vertical volcanic le surface [she 3 and mineral fl matters, now form the thick bed of amygdaloid and tufa intervening between tiic culmnnar trap and the rod sandstone. Tiiis is precisely wliat we find to be tlie case in modern volcanic eruptions. The lirst violent explosions in such cases usually eject immense quantities of dust and fragments of old lavas, which are blown or ejected to great distances, or if they fall into the sea, as was most probably the case at Blomidon, arc scattered in layers over its bottom. Over these ejected scoriic and ashes the lava currents which issue subsequently arc poured. We need not be surprised that we do not now perceive any regular volcanic mountain or vent at Blomidon, for independently of the action the waters may have exerted ou it when being formed, we know that great dciuidation has taken place in the Drift period, and under the wasting action of the present frosts and tides. Tiie minerals mentioned as occurring in the tnip are all cither silica or silicates,—that is, com- pounds of silica witii the alkalies potash and soda, or the earths, as alumina, lime, etc. They arc produced by the solvent action of water, which, percolating through the trap, dissolves these materials, and re- deposits them in fissures and cavities. Below the amygdaloid, we have a thick series of beds of red sandstone—mechanica
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
