 ... courses of sandstone. * * * Both Cambrian and Silurian rocks have been penetrated by numerous greenstone-dykes. Many of them are of a light grey colour and highly calcareous. Others assume the colour and texture of ordinary greenstone. Some of them...  Proceedings of the Geologists' Association - 338 psl.autoriai: Geologists' Association - 1889Visos knygos peržiūra - Apie šią knygą
 | Royal Geological Society of Cornwall - 1871 - 776 psl.
...colour and texture of ordinary greenstone. Some of them are magnetic. Amongst the Cambrian sandstones they run in all directions, sometimes with, but more...across, the strike. In the Silurian region they more generally run more or less parallel with the lines of bedding." RAMSAY, Quarterly Journal of the Geol.... | |
 | Royal Geological Society of Cornwall - 1871 - 794 psl.
...colour and texture of ordinary greenstone. Some of them are magnetic. Amongst the Cambrian sandstones they run in all directions, sometimes with, but more...across, the strike. In the Silurian region they more generally run more or less parallel with the lines of bedding." RAMSAY, Quarterly Journal of the Geol.... | |
 | William Jory Henwood - 1871 - 766 psl.
...colour and texture of ordinary greenstone. Some of them are magnetic. Amongst the Cambrian sandstones they run in all directions, sometimes with, but more...across, the strike. In the Silurian region they more generally run more or less parallel with the lines of bedding." RAMSAY, Quarterly Journal of the Geol.... | |
 | 1881 - 742 psl.
...calcareous, and effervesce on the application of an acid. One is magnetic. Among the Cambrian rocks they run in all directions, sometimes with, but more generally across the strike. In the Lingula flags they often run more or less parallel to the lines of bedding. Some of them fill cracks... | |
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