The section of the bank at the mouth of the Bear Lake River is as follows, beginning with the lowest bed:—
| 81 | Gravel, with thin layers of sand rising from the water's edge in a perpendicular cliff, to the height of | 30 | feet |
| Lignite (70 to 80 and 84) | 1 | ||
| 83 | Potter's clay of a bluish gray colour, alternating with layers of sand | 40 | |
| A sloping uneven brow, covered with soil, extends to the summit of the bank | 20 | ||
| 91 |
Lydian stone is the most abundant, and whitish quartz the least so of the pebbles mentioned in the text as entering into the composition of the gravel.
82A little farther up the Mackenzie, this bed of gravel passes into sand, which, in some spots, has sufficient coherence to merit for it the name of sandstone. During a great part even of the summer season, all the beds of sand are frozen into a hard sandstone; but a piece having been broken off and put into the pocket, speedily thawed into sand.
83Specimens of the clay, which I have denominated potter's clay, taken from near the beds of lignite, have a colour intermediate between yellowish-gray and clove-brown, a dull earthy fracture, and a slightly greasy feel. It is not gritty under the knife, and acquires a slightly shining smooth surface, adheres slightly to the tongue, and, when moistened with water, assumes a darker colour, and becomes plastic.
Section II.
About five miles above Bear Lake River, the cliff consists of Slaty sandstone evidently composed of the same materials with the friable kinds described in the text, but having tenacity enough to form a building stone. It incloses some
| seams of lignite | 10 | feet | |
| Lignite | 14½ | ||
| Clay and Sand | 50 | ||
| Irregular slope from top of cliff to summit of bank | 90 | ||
| 154½ |
Section III.
A little farther up the river than the preceding:—