BY FRITZ NOETLING, M.A., PH.D. 99 



1913. 



(4) Leaf beds- 



(b) Altered, 4 to 6 feet. 



(a) Normal, about 90 feet. 



(3) Breccia, about 12 feet. 



(2) Leaf beds, normal, about 40 feet. 



(1) Breccia, about 80 feet. 



(b) Southern part. 



iv. Humus, about 4 to 5 feet. 



iii. Basalt. 



(b) Normal, 

 (a) Vesicular. 



ii. Leaf beds. 



(a) Altered, about 4 to 5 fe^t. 



(b) Normal, about 40 to 42 feet. 



(c) Arenaceous, about 18 feet. 



i. Breccia, about 130 feet. 



The sequence of strata as given above shows that 

 the two parts of the section north and south of the fault 

 are somewhat different. The differences are slight only, 

 and may not be material, yet they have to be noted. 



The most important is the appearance of a Breccia 

 bed in the lower portion of the leaf beds; where it reaches 

 the surface it has a thickness cf about 18 feet, but it very 

 rapidly becomes thinner in the direction of the dip, and 

 has probably died out completely before reaching- the level 

 of the road. This conclusively proves that though the 

 deposition of the leaf beds was continuous, it was locally 

 interrupted by lay el's of Breccia. In other words, the 

 agencies which produced the Breccia continued to some 

 extent during the deposition cf the leaf beds, though on 

 the whole it would appear that the Breccia is older than 

 the leaf beds. 



The leaf beds are overlaid by a fairly thick layer of 

 vesicular Basalt, which is, however, of small horizontal 

 extension, and rests unquestionably on altered leaf beds. 

 The southera portion is somewhat obscured : the altered 

 leaf beds foi-m a conspicuous yellow band, which extends 

 from underneath the Basalt up to the fault; above this 

 are about five feet of leaf beds, which appear as if they 

 had been worked up, and seemingly dip in northern direc- 

 tion ; these are followed by a bed of humus appearing as 

 a conspicuous dark band. 



The remarkable feature is that the humus does not 

 overlap the Basalt, but abuts against it, and the same ap- 



