87 
wet — oe made “ almost peo i one 
sions.” 
There are some curious facts connected with this Sine 
enon which have not yet been mentioned, and which the lim- 
its I must paesaeitie to myself will not allow me to do more 
than enumerate :— 
ist, In most instances the counter i impressions are distinct. 
ly marked in relief on the under surface of the layer cover- 
ing the foot prints, these projections corresponding to the 
cavities below as exactly as a cast to its mould, 
The impressions never occur but on what the wo 
call a clay face, by which is meant a stratum, the outer coat 
of which has a slight admixture of clay, rendering it harder 
than the rest of the rock, accompanied sometimes with a thin 
layer of soft clay in the seam between the under and up- 
per stratum. 
3d, All the tracks are constantly in a direction either up or 
down, sometimes inclining a very little either to the right 
or left, but never running across the slope in any great de- 
“Ath, In aie of the impressions there are wae of the 
matter being displaced by the foot-marks, and wherever 
such an appearance occurs, the matter is ag to have ated 
earried directly downwards, with re the present 
inclination of the quarry. 
These two last circumstances, as well as that of the sii. 
ding tracks, prove that the strata must have been very much 
inclined, while in a soft state, and while in the act of form- 
ing though this is eisai to the received opinion as to the 
ation of sandstone. 
-» 6th, The sand must have possessed very considerable tena- 
city, and have even been sometimes skinned over with a stiff 
coat, for in one of the specimens preserved at Ruthwell, the 
claws of the animal had evidently broken through om outer 
coat at every step, and in two others, where the 
have rested on the matter just displaced by the for paws, 
their pressure, instead of obliterating the appearance of su- 
sero t —_ has “merely caused an indentation of the 
part rested 
6th, There ai dre “continuous strata of sandstone testi ing 0 
soda in which the impressions are found, for the distance of 
not less than a quarter of a mile, all of which must have been 
