722 VICTOR ZIEGLER 



Eldridge discusses each geological formation in great detail, 

 and the care with which all structural features are described is 

 worthy of special note. Rather than cite at length from this 

 report the writer has arranged the pertinent data given in tabular 

 form/ 



Structural Features at Golden 



Permo-Trias (Fountain, Lyons, Lykens) 



i. Rapid disappearance of strata successively from the top down- 

 ward as they approach Golden. Lyons disappears i mile north 

 of Clear Creek, and J-mile south respectively. Lykens dis- 

 appears about two miles north and south of Clear Creek. 



2. Disappearance of Lykens is sudden north of Clear Creek; gradual 

 to the south. 



3. Discrepancy of io° in strike with upper formations on disturbed 

 area. 



4. Normal thickness of Morrison is present where much of Lykens is 

 missing. 



Morrison 



1. Missing for a distance of about i| miles. 



2. Discrepancy in strike (io°-i5°) with younger Dakota and older 

 rocks on disturbed area — especially marked in part north of 

 Clear Creek. 



3. Sudden disappearance of Morrison north of Clear Creek; gradual 

 disappearance south. 



Dakota and Purgatoire 



1. Disappears from bottom up and top down. 



2. Discrepancies in strike with rocks above and below on disturbed 

 area. 



3. More sudden disappearance on north side of area. 



4. Marked crumpling on north side — frequent changes in strike, not 

 shown by Laramie, which is only 600 feet to the east. 



5. Normal dip 45 . Dips 90 and overturned over disturbed area. 



6. Remarkable crumpling and recumbent folding south of Golden. 

 (Not noted by Eldridge.) 



Benton and Niobrara 



1. Completely disappear from top downward. Benton absent for 

 distance of about 5 miles; Niobrara for 9 miles. 



2. Conformable in dip and strike to Dakota, but not to Montana on 

 disturbed area. 



3. After disappearance of Niobrara, overlain by successively higher 

 Montana beds as it approaches Golden. 



1 Op. cit., pp. 91-97. 



