480 ON THE TRAP-KOCKS IN YORKSHIRE, &C. 
the north of England, and also to a comparison of the 
phenomena of their various junctions, alternations, and 
intermixtures with those exhibited in other parts of Eng- 
land and particularly in Scotland, a country eminently dis- 
tinguished for the varied and highly interesting displays 
of the formations of the trap-rocks. 
