472 C. D. Walcott — Camurian Pocks of Pennsylvania. 



of the anticlinal in the New Red sandstone. No such anti- 

 clinal exists. The southern leg of Dr. Frazer's anticlinal is 

 formed of rocks that bear no resemblance to the Mesozoic Red 

 sandstone, and fossils of lower Cambrian age are abundant in 

 the nine feet of compact, fine grained sandstone described by 

 him. The section, from the fault line southward, is as 'follows : 



Thickness. 

 Feet. 



1. Gray, banded and mottled limestones, with purplish bed 



of limestone at summit three feet thick. This limestone 

 weathers into a more or less arenaceous shale. 



Strike, E. & W. (Mag.) Dip, 25° S 33 



2. Gray and buff sandy shales passing (at 21 feet) into shaly 



sandstone and then into sandy shale, where a belt of 

 calcareous quartzite occurs in layers varying in thickness 



from 2 to 12 inches 105 



Fossils : — Camerella minor, and fragments of Olenel- 

 lus, showing portions of the head and thoracic segments.* 



3. From the fossiliferous beds just mentioned, for a distance 



of 500 feet the hillside on the east of the railroad is 

 covered with the debris of sandy shales, and several ex- 

 posures occur along the wagon road. From the last of 

 these to the first outcrop of limestone, a distance of 250 

 feet, the debris of sandy shales and thin-bedded calcare- 

 ous quartzite occur abundantly in the southward-facing 

 hillslope. As the last observed dip was 25° S., it is 

 assumed that the section is unbroken, and a thickness is 



assigned to this division of 315 



Fossils : — Numerous fragments of Olenellus and casts 

 of Camerella minor occur in the calcareous quartzite 

 interbedded in the shale. 



4. Massive-bedded, dove colored, banded limestones. Strike 



N. 20° W. (Mag.) Dip, 25° S.f near base of series. Al- 

 though the section is more or less concealed by soil, 

 numerous outcrops occur in quarries to the south. These 

 show a banded limestone in the lower portion of the sec- 

 tion with numerous irregular, small, concretionary bits 

 of limestone, usually elongated with the bedding plane. 

 The average dip of the beds is from 20° to 25^° S. A 

 beautiful section is shown in a quarry about one-fourth 

 of a mile east of Emigsville, and in a quarry on the 

 turnpike west of the railroad in the outskirts of the 

 town. A little higher up in the section the limestones 

 are massive, light colored, and, in places, almost a white 

 crystalline marble. 



* On the line of strike of these beds, two miles northwest of Emigsville, the 

 following fauna was found in the calcareous sandstones : Camerella minor, Ooo- 

 lella crassa, Hyolilhes communis, and fragments of Olenellus. 



f Dr. Frazer's section indicates a dip of 85°. I was not able to discover the 

 locality where he observed it. 



