INVESTIGATIONS AT ASSOS, 1881. 215
The peculiar drainage of the southern part of the Troad is due to
the great east-and-west dikes of trachyte of which Coslou-dagh and
the plateau south of the Touzla are composed.
The basaltic rocks were extruded either during the latter part of
the miocene or after its close, and their presence has not materially
modified the topography of the country.
The Halesion Plain, near the mouth of the Touzla, has been sub-
ject to a considerable change, in the position of its stream, within
the historical period (two thousand years).
University Press : John Wilson and Son, Cambridge.
The peculiar drainage of the southern part of the Troad is due to
the great east-and-west dikes of trachyte of which Coslou-dagh and
the plateau south of the Touzla are composed.
The basaltic rocks were extruded either during the latter part of
the miocene or after its close, and their presence has not materially
modified the topography of the country.
The Halesion Plain, near the mouth of the Touzla, has been sub-
ject to a considerable change, in the position of its stream, within
the historical period (two thousand years).
University Press : John Wilson and Son, Cambridge.