Note 13 — XXXVI.

A bed of lime-stone has been recently discovered on the shore at Natchez below high water mark, two hundred feet lower than the summit level of the state of Mississippi. There are some extraordinary petrifactions in the north part of this state, among which is the fallen trunk of a tree twenty feet in length, converted into solid rock. The outer surface of the bark, which is in contact with the soil, is covered as thickly as they can be set, with brilliant brown crystals resembling garnets in size and beauty.

Thin flakes of the purest enamel, the size of a guinea and irregularly shaded, have been found in the ravines near Natchez. In the same ravines mammoth bones are found in great numbers, on the caving in of the sides after a heavy rain.