BOX ELDER REGION. 405 



Cyatliophyllum Nevadensis. 

 Litliostrotion Whitneyi. 

 Productus cor a. 

 Productus punctatus. 



The IMhostrotion Whitneyi found associated with the other forms in 

 Box Elder Peak is of special interest. Professor Meek, in his report, says, 

 speaking of this group: ^^Litliostrotion is a genus very abundantly repre- 

 sented by one or two species in the Lower Carboniferous, but unknown in 

 the Coal-Measures of the Mississippi Valley." This genus is, however, 

 found in several localities associated with Coal-Measure forms in Utah. 

 The limestone of the summit possesses a dark bluish-gray color, with a 

 compact and somewhat granular texture. On the peak next north occurs, 

 stratified in the limestone, a bed of bluish-gray, slightly calcareous quartz- 

 ite, which is a hard, compact rock, with the physical habit of quartzite; but 

 dilute acids indicate the presence of a considerable amount of lime. Its 

 chief interest lies in the fact that the same bed appears to have been recog- 

 nized in a number of other localities of the range, and it probably forms a 

 persistent and well-defined stratum in the upper members of the Wahsatch 

 limestone. 



The canons on the west side of Box Elder Peak cut deeply into the 

 side of the mountain, affording fine exposures of the Palaeozoic strata. 

 The Wahsatch limestone extends down for 3,600 to 4,000 feet, which 

 would be about two-thirds of the entire thickness of the belt. Below the 

 limestone, the Ogden quartzite can be distinctly recognized on the face of 

 the spurs, between the two limestone bodies, sloping gently to the north. 

 At the mouth of the canon, about seven miles north of Brigham City, near 

 the little village of Call's Fort, in a body of dark blue argillaceous slates 

 in the lower portion of the Ute limestone body, were found the following 

 fossils of the Quebec group: 



Bikellocephalus Wahsatchensis. 

 Dikellocephalus gothicus. 

 Crepicephalus {Loganellus) quadrans. 

 Lingulepis Ella. 



