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For this reason minor gaps in the serial numberorganic forms, the reason that we stopped because shestill not been taken in consideration, joined by many others.In addition to these returns periodically changes in the climate are more and more,wrong, the changes caused by new distributions of land and sea.These changes, which are sometimes elevated, sometimes lesssignificant, than the rhythmical changes, must, like the latter,determining in each region the ebb and flow of species and hencelarger or smaller, depending on the circumstances, breaks inpaleontological a number of organisms. Other, more specific, geologicalchanges must produce other and more local blanks insequence of fossil remains. So, as a result of increasing soilwhat happened in the interior of the continent, the natural drainage of the countrymodified, and instead of the sediment which it had taken the sea,a great river begins to bring the sediment unfavourable to variousanimals and plants that live in its Delta; as a result these rocksdisappear from the area; after a long period of time theyperhaps, again it will appear in modified form. Increase or decreasethe coast or seabed, entailing avoidance of sea currents, according toneed to move and place of residence of many species for whichthese trends favourable or harmful; further, this new distribution of currentsshould change the distribution of sedimentary layers, suspending suchway Sarita of organic remains in some areas and starting it inother. The volume of this article does not allow us to calculate many othersuch reasons, which include spaces, affecting us inpaleontological monuments of the past. But to calculate these causes waswould be absolutely useless; they are perfectly set out and explained examplesBasis of Geology sir Charles Lyell. But if these minor changes in the earth's surface producesmall gaps in some fossil remains, shouldn't largerrevolutions to produce large gaps? If the local improvement orlowering the soil makes in that small space, which itlimited to, the disappearance of several links in the chain of fossil forms, not clear whether that increase or decrease soil arounda significant portion of the earth's surface, must determine on a largefor the disappearance of a significant number of such links?
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