DOI Seite / Zitierlink:
https://doi.org/10.11588/diglit.748#0211
168 ARCHAEOLOGICAL INSTITUTE.
this fluidal structure, and more frequently there is an irregular
columnar structure at right angles to the slope.
The elongated cells and other marks which indicate the former
fluidity of the first trachyte occur in all parts of the area in which
this rock is exposed, and it is important to notice that these lines
of fluidal structure point to the Acropolis as a common source from
which the trachyte has proceeded.
The form of the hill of Assos, taken in connection with the facts we
have just noticed, together with the composition and distribution of
the volcanic conglomerate to be hereafter considered, make it evident
that the site of Assos was once the crater of an ancient volcano,
from which proceeded most of the volcanic rocks in its immediate
vicinity. It is probable that there are other ancient volcanic craters
in the Southern Troad, but as far as the explorations of the present
expedition have extended, the eruptions, excepting those at Assos,
have been through^ large fissures.
VOLCANIC CONGLOMERATE.
The term conglomerate cannot be properly applied to all of the
rocks considered under this head, for some of them are fine ashes
the separate particles of which cannot be perceived by the unaided
eye. However, the rocks are with few exceptions well-defined
conglomerate, and the exceptions are so intimately associated with
the conglomerate both in origin and distribution, that all must be
considered under one head.
The conglomerate is one of the most varied and by far the most
irregularly distributed formation in the vicinity of Assos. It occurs
chiefly upon the seaward slope in small areas varying greatly in
shape, and rests directly upon the irregular surface of the first
trachyte. The small patches are simply the remains of a once
more or less continuous sheet of fragmental material filling the
depressions in the old trachyte and hanging upon the steep slopes
of the hill.
In its most common constitution the conglomerate consists of
numerous fragments of trachyte of various sizes up to half a metre
in diameter. The light-colored groundmass which generally fills
the interstices is sometimes nearly wanting; in that case the rock
this fluidal structure, and more frequently there is an irregular
columnar structure at right angles to the slope.
The elongated cells and other marks which indicate the former
fluidity of the first trachyte occur in all parts of the area in which
this rock is exposed, and it is important to notice that these lines
of fluidal structure point to the Acropolis as a common source from
which the trachyte has proceeded.
The form of the hill of Assos, taken in connection with the facts we
have just noticed, together with the composition and distribution of
the volcanic conglomerate to be hereafter considered, make it evident
that the site of Assos was once the crater of an ancient volcano,
from which proceeded most of the volcanic rocks in its immediate
vicinity. It is probable that there are other ancient volcanic craters
in the Southern Troad, but as far as the explorations of the present
expedition have extended, the eruptions, excepting those at Assos,
have been through^ large fissures.
VOLCANIC CONGLOMERATE.
The term conglomerate cannot be properly applied to all of the
rocks considered under this head, for some of them are fine ashes
the separate particles of which cannot be perceived by the unaided
eye. However, the rocks are with few exceptions well-defined
conglomerate, and the exceptions are so intimately associated with
the conglomerate both in origin and distribution, that all must be
considered under one head.
The conglomerate is one of the most varied and by far the most
irregularly distributed formation in the vicinity of Assos. It occurs
chiefly upon the seaward slope in small areas varying greatly in
shape, and rests directly upon the irregular surface of the first
trachyte. The small patches are simply the remains of a once
more or less continuous sheet of fragmental material filling the
depressions in the old trachyte and hanging upon the steep slopes
of the hill.
In its most common constitution the conglomerate consists of
numerous fragments of trachyte of various sizes up to half a metre
in diameter. The light-colored groundmass which generally fills
the interstices is sometimes nearly wanting; in that case the rock