CONDENSED STATEMENT ON THE POINT. 67 
calcareous slate and arenaceous schist. Numerous 
blendings and alternations of the three deposits 
also attesting the reciprocal junctions of each kind 
with the others. 
3. The changeableness of the relative positions 
of the three rocks likewise greatly favours the idea. 
Lime is often received in small beds into the lap of 
the slate, and vice versa slate occurs resting on the 
lap of the lime in large or in very small patches, or 
even running through it in narrow veins. The 
respective relations of sandstone and lime, are 
prone to vary; and the slate intermixes greatly with 
the sandstone ; I have also even seen the former 
resting on the latter as a mere shallow bed. 
4. The course and dip of the three strata may in 
some measure be said to be similar. 
5. Lime and slate are both traversed by veins of 
jasper, and slate and sandstone are greatly loaded 
by veins of ordinary quartz. 
6. Lime and slate at points of approximation 
have been found impregnated by flinty matter. At 
one spot the lime assumes a siliceous character de¬ 
rived from the adjoining sandstone which contains 
a great proportion of that matter. 
7. The contained fossils are often generically 
and specificially identical. They are also congre¬ 
gated greatly at the points of union of the strata. 
8. There is no tenable indication of progressive 
improvement from a presumed lowest member of the 
series of animals (or beings generally) upwards. 
9. The strata appear to have been connectedly 
simultaneously and similarly affected by Plutonic 
disturbances ; the lime (except when very solid) 
and slate are both often bent towards their surfaces 
and margins where the consequences of igneous 
irruption might be looked for. They are both also 
(rarely) found bent in their very interiors. 
