GEOLOGICAL SUEVEY OF THE TERRITOEIES. 453 



All of that portion of tlie well-marked Cretaceous series here forming 

 divisions 1 to 10, inclusive, along with an important bed of coal, it will 

 he seen, stands in very nearly a vertical posture. On going a little far- 

 ther westward, however, across a lower space, showing no rocks, we 

 come to another Cretaceous exposure, (division 12 of the section,) con- 

 sisting of thin layers of light colored sandstone, including a workable 

 bed of coal, all dipping at an angle 55° below the horizon, in a nearly 

 south-southeast direction. In this sandstone, above the coal, numerous 

 casts of Inoceramus jyrohlematieus, and a few other Cretaceous fossils 

 occur. 



That the bed of coal found in this last mentioned outcrop, although 

 said to agree with the bed 7 in thickness and other characters, is really 

 not a part of the latter thrown over from above, or flexed and thrust up 

 fi:om beneath, is almost beyond doubt ; because the rocks in which it is 

 included do not agree lithologically with those immediately associated 

 with the bed 7, while none of the fossils filling the sandstone of division 

 12 were seen in any of the rocks directly associated with the coal 7. 



It therefore appears to be quite evident that there are at least two 

 distinct beds of coal in the Cretaceous rocks here. Exactly how the 

 beds forming division 12, with their included coal, connect with the 

 other Cretaceous strata, included- in the divisions 1 to 10, we cannot 

 very clearly explain. The probability is, however, that they, and possibly 

 other associated strata hidden under the soil, were originally tilted with 

 the other Cretaceous beds, (1 to 10,) to a vertical posture at the time of 

 the upheaval, and then fell over to the present inclined condition. We 

 observed no evidence whatever that they correspond to any part of the 

 series included in the same section farther west. 



If only the strata already mentioned (1 to 12 inclusive) at this 

 locality are Cretaceous there would then be, exclusive of other beds 

 that inay be hidden in the spaces 11 and 13, about 1,213 feet of rocks 

 seen here that are certainly of Cretaceous age. 



West of the out-crop of division 12, we have first another lower 

 space of probably about 450 feet, in which no exposures of rock in place 

 were seen. Then we come suddenly to a great series of sandstones, 

 clays, conglomerates, &c., more than 2,000 feet in thickness, (forming 

 divisions 14 to 2Q, inclusive of the section,) all standing in a vertical 

 posture, excepting the beds from 14 to about the 18th, all of which lean 

 slightly to the eastward of an exact perpendicular. Whether or not all 

 of this great series, from division 14 to 26, should also be included in 

 the Cretaceous along with those forming the eastern portions of the 

 section, we were unable to determine, because we saw no organic re- 

 mains in any of these beds, excepting a few undeterminable fragments 

 of shells in the upper layer of division 15. The fact, however, that 

 these strata stand so very nearly conformable to the well-marked Cre- 

 taceous beds, from 1 to 10, would rather favor the conclusion that they 

 belong to the same system of rocks, though it would not necessarily 

 demonstrate that this is the case. 



West of division 26, we come to a space of about 260 yards or more, in 

 which no rocks were observed in place, excepting a few low out-crops of 

 light grayish sandstone, but little above the base line of the section. 

 These are almost horizontal, or show only a slight inclination below the 

 horizon toward the west; being thus strikingly unconformable to all of 

 the other strata of the section. We saw no fossils in these beds, but 

 they are almost certainly Tertiary. 



Immediately on the west of the last-mentioned outcrops, and nearly 

 in contact with one of them, there is exposed, in a cut made for the pass- 



