FREE BOOKS

Author's List




PREV.   NEXT  
|<   111   112   113   114   115   116   117   118   119   120   121   122   123   124   125   126   127   128   129   130   131   132   133   134   135  
136   137   138   139   140   141   142   143   144   145   146   147   148   149   150   151   152   153   154   155   156   157   158   159   160   >>   >|  
s the angler with various species of fish, many of them of large size. A former race, presumably the modern Indian, did much work within the cave. Tons of travertine or stalagmite, the so-called alabaster, have been quarried from some of the deposits, while a large number of flint nodules has been dug out of the cave-earth where they fell from the disintegrating limestone. Some of this labor was carried on more than a mile from daylight. The mouth of the cave was formerly almost closed by a mass of talus. About 10 feet has been removed from the top of this, so that one may now walk in without difficulty. On the inner side of the portion remaining there is a slope for 96 feet, to a vertical depth of a little more than 27 feet. The next 100 feet gives a descent of about 3 feet; then another steep slope begins. The first point at which bedrock floor is found within the cave is 120 feet lower than the point of entry. It is supposed that the drainage to which the cave owes its origin was outward; if this was the case the floor must be more than 120 feet below the roof at the doorway. While this may be true, it is not indicated by the condition of the visible strata. For about 50 feet outward the side walls are nearly parallel and nowhere more than 30 feet apart. Then they terminate at an angle in the outcrop of the ledge along the hillside. The appearance and condition of the upper strata, together with this narrow separation of the side walls outside the cave, produce the impression that at a period not very remote the roof of the cavern reached to the outcropping ledge in which the walls end. Even though the rock floor should be at the great depth supposed there is a possibility that an earth floor could be found below the detritus which has accumulated since the roof fell in or has worn away. To test the matter a shaft was begun at a point 16 feet in front of the doorway. This was as near as such work could be done without interfering with the advent of visitors, and allowed a margin of 30 feet toward the outer slope. The shaft, 6 feet in diameter, soon passed into a compact mass of red clay filled with rocks of various sizes. At 14 feet down this was broken by an irregular stratum averaging a foot in thickness, of coarse sand or fine gravel with a slight admixture of clay, such as would form in a running stream. Its slope was inward or toward the cave. As there are sandstone ledges on the hillside above, this sand
PREV.   NEXT  
|<   111   112   113   114   115   116   117   118   119   120   121   122   123   124   125   126   127   128   129   130   131   132   133   134   135  
136   137   138   139   140   141   142   143   144   145   146   147   148   149   150   151   152   153   154   155   156   157   158   159   160   >>   >|  



Top keywords:

outward

 

hillside

 

doorway

 

strata

 

condition

 

supposed

 

accumulated

 

possibility

 
detritus
 
outcrop

matter

 

impression

 
period
 

produce

 

narrow

 

separation

 

remote

 
appearance
 

cavern

 
reached

outcropping

 
interfering
 

gravel

 

slight

 

coarse

 

thickness

 

irregular

 

stratum

 

averaging

 

admixture


sandstone
 

ledges

 
running
 

stream

 

broken

 

margin

 

diameter

 

allowed

 

visitors

 

advent


passed

 

filled

 

angler

 

compact

 

species

 

nodules

 
remaining
 

portion

 

number

 

vertical