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What do these facts prove? They clearly provewhat species Wallis separated layers with more than twenty thousandfeet thickness, and, therefore, belong apparently to the periodconsiderably distant from each other, in fact, lived at the same time.They prove that the mollusks and sea lilies, which was considered until nowexceptionally belonging to the most ancient Silurian formations, andassumed extinct long before that time, when the shellfishand sea lilies of the later Silurian strata, in factthere was at one time with the last one, and can very easily be thatthe latest appeared in as early a period as the first. They prove,not just mineral properties of sedimentary formations, but the meetingorganic species contained in them is largely dependent onlocal conditions, It proves that fossils fall into whatwhatsoever group strata cannot be taken forspecies of flora or fauna is exclusively of the period to which theybelong. In short, these facts throw a strong doubt on manygeological generalizations. But despite a number of such facts and directly expressedthe view that the evidence of organic remains is to be trusted in thiswith respect to "with the same restrictions as the testimony of the mineralsigns", sir Charles Lyell makes a positive conclusion on the basis ofthis evidence, he makes them even where the number of common mineralstypes slightly, and the distance of the area great. Having settled that in variousareas Europe a distinguishing feature of the Eocene strata arenummulite, he concludes, without citing in support of his opinion nofurther evidence that wherever there nummulite, whether inMorocco, in Algeria, in Egypt, in Persia, in Sindh, in the Heap, in East Bengalor on the borders of China, the formation containing them, must belong tomiddle Eocene system.
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