OF C LAC KM AN AN S HIRE. 4H5 



an inch thick, and composed of numerous thin la- 

 minae. The mytili are in general quite soft and 

 friable, and they cannot be taken from their place 

 in general without breaking. 



Some time ago, the shell of a common crab was 

 found in the clay near Alloa, when digging an 

 arc for a mill-wheel ; and near the same place, 

 entire stags horns and broken pieces have been 

 found ; and it is common to find large pieces of 

 oak trees, quite fresh, though of a very dark co- 

 lour. 



These are the particulars which have occurred 

 to me respecting the alluvial rocks or soil that 

 rest on the coal formation, which we are next to 

 describe. 



SECTION XL 



COAL FORMATION* 



Having in the preceding section treated of iht: 

 alluvial soil which covers the strata of Clackma- 

 nan, we shall now give a general description of 

 the strata, the beds of coal, and the great slips 

 which occur in this district. 



We have but few opportunities of examining 

 that part of the strata which is next the earth co~ 



Mh 3 



