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Meanwhile, the improbability of such a coincidence is easyto prove the facts reported by the same sir Robert Marcionem. If, as henotice the fossilized remains of crustaceans that are in the topthe Silurian rocks of Lanarkshire, really "all exceptone questionable case differ sharply from all other knownrocks encountered at the same horizon in England", what is the baseare we to assume that the rocks that lived during the Silurian periodthe opposite side of the globe was approximately the same withexisted here? Is the doctrine of the widespread distribution of the species is notonly implicit in the insights of sir R. Murchison, but also positivelyspeaks to them. "Already, the presence of graptolite," he says, " rightindicates that the rock containing it, belong to the Siluriansystem." And he says this despite the fact that he has repeatedly warnedreader against such generalizations. As Geology progressedforward, was more than once that one or the other fossil species, whichlong considered characteristic for one particular formationwas open to other formations. About twelve years ago, nothappen example that goniatite across lower Devonian; but atnow in Bohemia, they were found in strata which are considered to bebelonging to the Silurian system. In a very recent time were,what artieri, which until now were considered exclusively Paleozoiskiythe type can be caught and along with mezozoiskii Ammonites and belemnites.But no matter how numerous this kind of open, they still can'tto shake the belief that identity formation to one or another age mayto be determined by the presence in it of one of some fossil species are Fewthis belief is going through the evidence, causing him more fatalblows. Speaking of the Silurian system in Western Ireland, sir R. Murchisonnotice "Near Mamma Professor Nicole and I gathered the remnants, some of whichcan be attributed to the lower Silurian system, and others - to the topthe Silurian". And then he calls a few fossil speciesEngland is characteristic of the upper part sadlowski rocks or the topSilurian formations, there are several other types that "in all otherareas how much you know, caught only in the layers landamericaera" - in other words, in strata belonging to the middle Silurianera, and finally, several of these species, which are still metonly in the lower Silurian strata, only slightly above the most ancient layerswith the fossil remains.
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