468 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



[vol. 50 



is by far the most striking and suggestive of the series. No red 

 sandstone is here visible. The limestone is shattered and turned up 

 at an angle of 8o°, the cliff face having an average slope of about 46 . 

 Immediately beneath this appears the white sandstone, at first 

 crushed to powder, but beneath gradually assuming a more solid 

 form, until at the bottom of the outcrop it is nearly normal in ex- 



\ 



29 

 30 \ 



\ * 



28 



26 



"H'3od 



\ 



VI 



4— 



Main Shaft 



III D 8 

 1 0ID2 o 



22 

 o 



3©4 



23 



IV 

 D 7 

 o 



20 

 o 



,/ 



y 



/ 



/ 

 10 



Scale / 



1C0 100 200 300 iOOft 11 

 k~-h 1 1 1 1 



12 13 



15 

 o 



25 



24 



-23 



II 



D 

 021 



19 

 o 



.22 

 -21 



—20 

 — 19 



-18 



"17 



\ 



\ 

 15 



16 



□ Shafts 

 O Drill Holes 



Fig. 125. — Diagram Showing Position of Drill Holes and Shafts in Bottom of 



Crater. 



ternal appearance. This, too, dips away at a high but smaller angle 

 than the limestone, which is undoubtedly faulted against it, as 

 shown in the sketch. An almost equally interesting point in the rim 

 is that at Station 16 (S. 56 E.), where the sandstone in the face of 

 the cliff is faulted up so as to abut squarely against the limestone, 

 the beds to the northeast having a dip of 44°-54°, while those to the 

 southwest lie at angles of but 6°-20°. This vertical fault is shown 



