Geology of High Teesdale. 173 
to pieces under the blows of the hammer. When thrown upon 
a plate of iron, at a temperature a little below red heat, the grains 
give out a beautiful pale yellowish phosphorescent light. 
7. About half a mile below the last-mentioned locality, and 0sier natwat 
immediately above a remarkable escarpment called the Falcon- 
clint, the trap on the north bank of the Tees appears to be nearly 
parallel to the inferior beds, and the effects produced by it are 
illustrated by several fine natural sections, some of which I proceed 
to mention*. 
SECT 1: 
No. Feet. 
(1.) Columnar trap, forming a high escarpment. 
(2.) An indurated mass, variable in colour and 
texture, and full of cells and cavities ....... 3 
(3:) ps Granular TuMmestOme pap. ser -sch5, <6 spsjeye cere, eodusetols,<+./ oA 
(2b welvard) “wihetoslater. < s) « 5 cess, snsiseyoas) ouees-pcinctse.s /_ 
(5.) Granular limestone.......... 8 
The inferior portion of the escarpment is concealed. 
Secr. 2. 
Feet. 
No, 
(1.) Prismatic trap, nearly forty fathoms thick, 
forming a succession of escarpments to the 
top of Widdy Bank. 
). Hard: wreeolar cellar beds s.-.a0)06.-01-s00 7 
(3.) Indurated slate-clay........... eile aster co tes or 
Clie Ocular DEO. cancer titer at anes oy 
(5.) Granular limestone...... BRGRN a cintapis ic. ae coe's LO. 
The lower beds covered by alluvial matter. 
* Each of these sections is given in descending order, No. (1.) forming the highest 
part of the escarpment. 
