| Popis: |
Conclusion From the facts above detailed, we may conclude— 1st.That the primary stratified rocks of the southern shores of the Moray Frith were elevated at very considerable angles previously to the deposit of the Old Red Sandstone, and that the granite by which they are penetrated also belongs to a prior epoch. The elevation of the secondary strata to their present situation, the fracture of the boulders contained in the great conglomerate, and the faults and fissures in the sandstone, may have been caused by elevations in the line of the Grampians or of the great Caledonian Valley at an epoch, most probably, posterior to the deposit of the lower Purbeck beds, which, at Linksfield, have been bent and fractured by the elevation of the subjacent cornstone. 2nd.The great conglomerate and red sandstones, containing fish of the genera Dipterus, Diplopterus, Cheirolepis, Cheiracanthus, Coccosteus, &c ., represent the Orkney, Caithness, and Gamrie rocks in Scotland, and the inferior division of the Old Red Sandstone of England. 3rd.On these are superimposed a series of marly conglomerates and sandstones (containing cornstones), which are characterized by a distinct and very characteristic series of fossils, and are equivalent to the central division of the Old Red system to the south of the Grampians, and in England. 4thand lastly, the superior siliceous conglomerates and sandstones without fossils occur, but no indications of the coal-strata. These conclusions are perfectly consistent with the appearances presented by the strata containing ichthyolites in other parts of the north of Scotland. The Rev. Mr. Clouston, of Shandwick, informs me that the |
