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INVESTIGATIONS AT ASSOS, 1881. 183

narrow, and fertile. Along the northwestern base of Coslou-dagh
the river flows through a deep gorge. The pinnacled slopes of
coarse angular conglomerate at this place give a peculiarly wild
aspect to the scenery. The river then enters the broad fertile
plain from which the ancient Assians derived their supplies; turn-
ing northwestward, it passes another deep defile, about eight kilo-
metres in length, before reaching the great Halesian Plain of the
western coast.

Judging from the distribution of the streams, one would naturally
suppose that there was but little system in the arrangement of the
mountains of the Troad. This impression is only heightened by a
casual study of these highlands, but when their geological structure
is fully known, they will be found to be a closely related and ex-
tremely interesting group, the diversity in the arrangement of which
is due to differences in structure and origin.

Mount Ida, or Caz-dagh (Goose Mountain), as it is known to
the Turks, is the chief mountain of the peninsula, and reaches a
considerable height above the timber line. Viewed from the great
Plain of Edremit, it appears to be a low cone upon a small but lofty
plateau. Such is apparently the case from other positions, for the
present summit is only a small portion of the rim of a great dome
which once formed the top of that grand mountain. The arrange-
ment of the spurs and ridges connected with Caz-dagh is peculiar,
and can be fully understood only when the geological structure of
that group is better known. It is certain, however, that none of the
parts which properly belong to Mount Ida extend beyond the great
Plain of Beiramitch, or further west than Dikeleh-dagh, upon a spur
of which (Cojaykia-dagh) are situated the remains of ancient
Gargara.

The divide between the valley of the Touzla and that of the
Bahchahlee, which is the largest tributary of the M^ndereh, is low,
and the topography so misleading that the position of Ivadjik, the
largest town in the southern part of the Troad, is, upon most maps,
incorrectly represented. The watershed south of the one just men-
tioned, separating the valley of the Touzla from the sea, between the
sites of Gargara and Lamponeia, is comparatively low and broken,
thus completing the semicircle of plains and low hills which mark
the topographical as well as the geological limits of Mount Ida.
 
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