PEALE.J DESCEIPTIVE GEOLOGY BEAR RIVER RANGE. 599 



These correspond very closely to fossils found in the same beds by 

 Mr. Hague. He refers the limestones to his Wahsatch Group, the lower 

 portion of which he considers as Devonian. At the forks of the stream 

 the dip to the westward is 15° or 20°, and lower beds appear. The 

 general section in the bluff on the I^orth Fork facing the east is as fol- 

 lows: 



Section iVb. 31. 



1. Massive limestones. 



2. Laminated limestones and shales. 



3. Massive blue limestones. 



4. Dark blue limestones. 



5. Thin laminated limestones, mtb bands of sandstones and slates. 



6. Sandstone, with fucoidal markings and interlaminated limestones. 



7. Laminated limestones. 



Station 125 was located on the east side of the Korth Fork on a white 

 saccharoidal Mmestone which lies at the top of the massive blue lime- 

 stones (So. 3 of the section). This was merely a fragment capping the 



hill. They dipped to the westward and contained Leptopora I 



and crinoidal stems. In the limestones below I found crinoidal stems 

 and an undeterminable Rhynclionella. 



In layer IsTo. 5, running down to 6, the following were obtained: 



OrtMs like 0. plicatella. 

 Fragments of trilohites. 



In ISo. 7 similar forms were found, and at the forks an OrtMs like 0. 

 testudinata. Looking north from the station, the beds on the east side 

 of the North Fork, at a point about 5 miles north of the station, appear 

 to dip to the eastward, so that there is probably an anticlinal axis a 

 little to the east of the station. On the west side of the North Fork 

 there were some dips seen from a distance that seemed to indicate that 

 the synclinal which enters into the formation of this ]3ortion of the 

 range gradually dies out to the northward as the beds rise. If so, the 

 western dip noted at the forks must soon give place to an eastern dii), 

 and the anticlinal axis just noted must also fade ont. 



On Station 111, which is a little north of east from Station 125, and 

 nearly six miles distant, the beds dip gently to the westward, and just 

 west of the station there is a bluff face. Between this i)oint and the 

 North Fork there must be a synclinal. This, as we shall presently see, 

 probably continues northward and forms the principal part of the range. 



Eeturning again to the western sub-range, we found that the lime- 

 stones that outcrop at the mouth of Logan Canon rise as we go to the 

 northward, and outcrop only at the summit of the range when we reach 

 Station 123.' Following up the main caSon of the creek that flows 

 through Smithfield, we have first limestones which show somewhat ob- 

 scui'ely, dipping about 17° south of east. Above the Umestones are red- 

 disli quartzites, and then come thin yellowish argillaceous slates that 

 are highly calcareous. Next foUow limestones and a layer of slates 

 like those below the limestones. In some of the layers of the up]3er 

 slates the surfaces were covered with impressions of a Discina. Above 

 these are massive limestones as far as I penetrated u\) the canon. Mr. 

 Mushbach reports that blue limestones outcrop on the station, and a 

 little below is a white quartzite in which a fragment of Productus was- 

 found. Below this he noted a reddish quartzite with fucoidal markings. 

 The latter is probably the same as layer No. 6 in the section at the forks, 

 of Logan Canon ; if so, the limestones above are the same as Nos. 4: 

 and 5, which are probably Carboniferous. 



Station 114 is located on the north side of Bloomington Creek, be- 



