 | 1855 - 990 pages
...centre, where it was soft and fluid, like melted pilch. It was thus evident that all the hnrd portions had risen in a fluid state, and by the heat of the...sun had been gradually spread out over the surface. Being constantly exposed to the dust, it had become so thoroughly incorporated with the asphalt that... | |
 | Geology - 1907 - 808 pages
...and some of them form largo ponds or lakes. One of the springs was passe* 1 on our way to the eity. and was near the . outcrop of bituminous shale in...had been gradually spread out over the surface; at (lie same time being constantly exposed to dust, it had become so I horoughly incorporated with it... | |
 | WILLIAM P. BLAKE - 1857 - 480 pages
...centre, where it was soft and fluid like melted pitch. It was thus evident that all the hard portions had risen in a fluid state, and by the heat of the...sun had been gradually spread out over the surface. Being constantly exposed to dust, which had become thoroughly incorporated with the asphalt, it had... | |
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... One of the springs was passed on our way to the city, and was near the outcrop of bituminous shale in the banks of the creek already described. This spring was nothing more than an overflow of the bitumen from a small aperture in the ground, around... 