Fossil Wood.—In digging a well in the Genesee Valley, one mile east of the river (at Hosmer's), part of the trunk of a tree, of mature growth, was found at the depth of forty-one feet below the surface. The soil was a loose sand mixed with gravel. The position is more elevated than the flats, so called.
Antlers.—A large pair of elk's horns were discovered in an excavation made for the foundation of a mill at Clyde, in Seneca County. They were imbedded in alluvial soil, ten feet below the surface. This surface had been cleared of elm and other forest trees of mature growth. Near the same place, logs of wood were found at the depth of fourteen feet. These discoveries were made in the valley of Clyde River, which is formed by the junction of the Canandaigua Outlet with Mud Creek.
Frogs Enclosed in the Geological Column.—At Carthage, on the Genesee, twelve or fifteen frogs were found in excavating a layer of compact clay marl, about nine feet below the surface. The position is several hundred feet above the bed of the Genesee River, to which elevation no one, after viewing the spot, will deem it probable its waters could have reached, this side of the diluvian era.
A frog was dug out of the solid rock, at Lockport, Niagara County, by the workmen engaged in excavating the canal. It was enveloped by the limestone which abounds in cavities filled with crystals of strontian and dog-tooth spar. It came to life for a few moments, and then expired. There was no aperture by which it could possibly communicate with the atmospheric air. The cavity was only large enough to retain it, without allowing room for motion.
The inclosure of animals of the inferior classes in the sedimentary strata, and even in the most solid substance of rock, is a fact which has been frequently noticed, without, however, any very satisfactory theory having been given of the process, at least to common apprehension. Vide [Addenda], for some further notices of this kind.
Fossil Vegetation.—A well was dug in the lower part of the village of Geneva, in 1820, which disclosed, at the depth of thirteen feet, the branches and buds of a cedar-tree. They were found lying across the excavation, and in the sides of it; and were in excellent preservation. No one could conjecture in what age they had been buried. But this discovery would seem to establish the position that the catastrophe occurred in the spring.
Madrepore.—A madrepore, measuring eight inches in diameter, was found in the upland soil of Caledonia, Genesee County. Smaller specimens of the same species occur in that township. Madrepores of a large size have also been found imbedded in the soil, or lying on the surface, in various places in Cattaraugus and Alleghany counties. They are locally denominated petrified wasps' nests. The lands containing these loose fossil remains are contiguous to, or based on, secondary rocks at considerable elevations.
Boulders and Primitive Gravel.—But the most abundant evidences of diluvial action are furnished by the masses of foreign crystalline rocks which are scattered, in blocks of various sizes, on the surface of the soil, or imbedded at all depths within it. Primitive rocks are foreign to the district, and these masses could not, therefore, have resulted from local disintegration. They must have been transported from a distance. They required not only an adequate cause for their removal, but one commensurate with the effects. Such a cause Cuvier supposes, in discussing the general question, may have existed in eruptions, or in the action of oceanic masses of water, operating at an ancient period.
The latter opinion appears to be generally adopted. Dr. Mitchell, in reference to northwestern boulders, attributes their distribution over secondary regions to the draining of interior seas or lakes. Mr. Hayden, in his Geological Essays, refers them to the action of oceanic currents setting "from north and east to south and west."
Subordinate and Equivalent Strata.—These constitute the most intricate subjects of reference. They are either adjuncts or residuary deposits of leading formations. But their order, as accompanying series, must sometimes be sought for by a previous determination of the formations themselves. Could we certainly know, for instance, that the sandstone of Western New York is or is not the true coal-sandstone, or the limestone is or is not the carboniferous limestone, it would at once direct to positive eras, and serve to impart confidence in the prediction of unknown deposits of an important character. But, in order to fix the formations, it is often the safest mode of procedure to employ the subordinate and local deposits as evidences of the character of the formations embracing them.