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Some sandy layers on the left Bank of the river Tovey, which sir R.Murchison (based probably on their mineral properties)classified in his Silurian System under karadagskogo Sandstonebe now his own judgment, based on coming across themfossils, belong to the Llandeilo formation. Meanwhile stillthen, continue to do and make conclusions based on mineralsigns. Despite the fact that Siluria, like many other geologicalworks, proves with numerous examples, often in the space ofthe few miles to meet the rocks of the same antiquity, sharplydiffering from one another in their composition, while rocks, veryvarious degrees of antiquity, are often similar in their composition,despite the fact that he sir R. Murchison as, for example, in the abovethe case shows us how in the previous activities, it was introduced ina misleading confidence in the lithological evidence - despite all of this,in all "Siluria," reasoning it shows that he considers absolutelynatural to expect formations of the same ancient chemical identitiescomposition, no matter what distance they were from each other.For example, referring to the Silurian rocks of South Scotland, he says:"When I in 1850, drove road between Domini and Moffat, it occurred tomind that monotonous reddish or purple Sandstone and shale,occurring in the North from first town, and so strongly reminiscent of the lowerrocks Longmynd, Llanberis and S. David, needs to be the samethe antiquity of these last." Then he again insists on the fact thatthese layers are "absolutely identical in composition with the lower mountainrocks of the Silurian region." On the basis of this identity of mineralsigns and concluded that this Scottish formation of modernthe lower formations of the Wallis because the number available therepaleontological data is too low to use itwas to confirm or refute this kind of situation. If betweenThe Wallis and Scotland ran continuously such layers, located inthe same order, then, of course, it is unlikely that it would be possible to object tosimilar output. But the fact that he sir R. Murchison admits that inWestmorland and Cumberland some members of the system "acceptlithological appearance, quite different from that which they have inSilurian and Valleskey areas", therefore, there is no reasonto expect mineralogical continuity in Scotland. So the obvious waythe assumption that these Scottish formations are of the same antiquity withcommandsim Shropshire in, involves a secret belief that the well-knownmineral characteristics typical of known ages.
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