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: 
Geology of the Boophiors 198 
action, has enjoyed since historic times a long immunity from 
earthquakes. Many earthquakes have been recorded in Con- 
c 
ness and desolation, on the other the luxuriant and picturesque 
scenery which has made the Bosphorus so famous. The local- 
glomerates, and variously-colored clays and earths. The metal- 
liferous rocks 
furnish pyrites of iron, and arsenic, and are decidedly 
opposite Sariya, but higher up in the eruptive rocks, or where 
these meet i we n : 
everywhere, but there is no trace of copper below Sariya until 
Wwe come to the Prince’s Islands in the Sea of Mermora. 
The origin of the Bosphorus.—It is evident, from the facts 
already stated, that what now constitutes the Paleozoic zone of 
le 2 Sen a territory of about 700 square miles, rose 
as asingle island. For ages it continued to be so. It was not 
until the close of the Tertiary period that it was united to the 
Continent of Europe, although it was probably during the Cre- 
Ceous epoch that it became a part of Asia. Until its union 
