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I INTRODUCTORY CHAPTER
The two shores of the Adriatic are totally different in their natural
characteristics; the western being almost islandless and destitute of harbours,
while the eastern is fringed by an almost continuous chain of islands and
possesses several magnificent harbours which communicate with the open sea by
narrow channels easily fortified, the rocks rising precipitously from the water
along the greater part of the coast, whereas on the Italian side there is an
equally continuous strip of alluvial plain between the foothills and the sea.
The Adriatic was once bounded by a kind of ridge stretching from Monte
Gargano to Albania. North of this line the depth is much less than in the Ionian
Sea. When the surface of the earth sank, the Dalmatian islands were formed by
the letting in of the sea. The depth near Parenzo is about 120 ft.; in the
Quarnero, near Fiume, 195 ft.; between Cherso and Arbe, 335 ft.; and south-west
of the island Zuri (some 24 miles from the mainland), about 700 ft. Depths as
great as 335 ft. to 490 ft. are, however, not very common within nine miles of
the mainland. In the Bocche di Cattaro the depth near the mouth is 165 ft., but
half a mile west of the Punta d'Ostro, 335 ft. North of the line from Monte
Gargano to Pelagosa, Cazza, and Curzola it is never as much as 780 ft.;
south-east of this line the [2] bottom sinks so much that
between Cattaro and Brindisi it reaches a depth of over 5,000 ft. The tide is
scarcely perceptible, and the currents are very slight. The land is still
sinking, as is proved by the Roman sarcophagi found beneath the water at Vranjic
and the submerged roads between Aquileia and Grado; while there are records of
the destruction of ancient towns from sudden subsidences, as that of Cissa, near
Rovigno. The subsidence has been calculated as about a yard in 1,000 years.
Cluverius proves from Ptolemy that in antiquity the name Adriatic only applied
to that part of the gulf which lay to the north of a line between Monte Gargano
and Durazzo. A passage of
Strabo,
describing the people of Epirus, runs: "The Adriatic being ended, the Ionian
commences, the first shore of which is in the neighbourhood of Epidamnus and
Apollonia." When Venice conquered Durazzo the limits of the Adriatic were
extended, and it was thenceforth called the Gulf of Venice. In 1859 the almost
incredible fact is recorded that it was frozen for several days!
The Austrian provinces which lie along the coast are, commencing at the
north, the Küstenlande, Istria, and Dalmatia. In the first the Julian Alps form
a great boundary wall to the plain of the Isonzo, from which the ground rises
between Monfalcone and Nabresina to the stony district of the
Karst. The Istrian
ranges are spurs from this lofty plateau, the chain culminating in
Monte
Maggiore, north-west of Fiume. All these heights belong to the Julian Alps.
Beyond Fiume, southwards, there are three principal mountain chains, all of
which have much the same formation of limestone, pale brownish or grey in
colour, with fossils and streaks of other colours. The first is the Dinaric Alps
or Velebits, a continuation of the Julian Alps. These separate Dalmatia from
Bosnia as far as Imoschi, where they enter Herzegovina, finally joining the
[3] Montenegrin chain. The chain of the shore
commences on the left bank of the Kerka and extends to the Narenta, which cuts
it. It runs as far as Trebinje, beyond the river. The Montenegrin mountains,
which are so impressive above the Bocche di Cattaro, joining with those of the
Herzegovina, make the third chain. The islands and rocks in the sea appear to be
submarine branches of the littoral chain; the strata lie in the same direction—in
the North Dalmatian islands to the northwest, in the Southern to the west. On
the peninsula of Sabbioncello they lie partly in one and partly in the other
direction. The former connection between the islands and the mainland is proved
by the remains of rhinoceros, horse, and stag in the diluvial bone breccias of
Lesina, and the survival of the jackal in Giuppana, Curzola, and Sabbioncello.
Geologists hold that the deeply cut bays of Sabbioncello and Gravosa, as well as
of the Bocche di Cattaro, and the step-shaped sinkings of the northern and
eastern limestone mountains towards the Adriatic basin are signs of the tearing
away of the islands from the mainland, perhaps through the destruction of the
permeable strata.
These generally show in their forms the craggy and stony character of the
Dinaric Alps, rising perpendicularly from the water on the side of the
prevailing wind, and without vegetation. On the other side are softer hills and
plains with southern vegetation, the.aromatic scents from which are carried by
the breeze. There are about twenty large islands, some of which are over 30
miles long; but the number may be raised to a hundred by counting in the small
ones. They are generally in groups or chains, though some are isolated. The
water is generally deep up to the shore, so there are very few sandbanks.
The greater portion of the naked surface of the land is formed of limestone
and dolomites, which are closely [4] related: there are
also, on the lower levels, grey or red sands, among which schistous loams of
uniform colour predominate. These two formations stretch from one end of the
province to the other in sloping beds. They are interrupted here and there by
loam and schistous clay and horizontal beds of a kind of limestone: below these
are lignites and chalky limestone, in which shells are found belonging to a
later formation. The oldest formations are the volcanic mountains near Knin and
on Lissa. Next follow the trias strata, as under the Velebits and westwards from
Sinj, then the sandstone beds, the different eocene beds and alluvial strata, as
in the plain of Dernis, north of the
Vrana Lake, by
Nona and Imoski. The principal characteristic of the Karst district (to which
Dalmatia belongs geologically) is the way the water flows, sometimes above,
sometimes under ground. Where the woods were cut down to supply the Romans and
Venetians with material for constructing their fleets, and where natural
afforestation has been stopped by the feeding of sheep and goats, the red earth
has either been washed away by the rains or blown away by the winds, so that it
is only in the hollows that cultivation can be carried on.
The bitter north wind, the
Bora, is the curse of the district. In the island
of Arbe it sometimes blows even in June and July, stripping the vineyards as if
hundreds of men had been at work, and carrying the salt spray all over the
island, to the great detriment of vegetation. It is sometimes strong enough to
upset pedestrians, and it is said that if it were not for it, there would be
neither winter nor cold in the Dalmatian littoral. On the heights winter begins
in November and lasts till April, with heavy snowfalls; but on the coast spring
begins in February, and winter only at the beginning of December. The summer,
which commences in May, is usually rainless, with the heat tempered by
sea-breezes, [5] though at the end of August heavy rains
commence, and in autumn the frequent changes of temperature are dangerous. The
flora consists of nearly 2,500 species, described by
[Roberto de] Visiani in his "Flora
Dalmatica." The aquatic flora contains nearly 700 varieties, many of the seaweeds
being exclusively Dalmatian. Views on the coast of Ragusa, or at Castelnuovo, in
the Bocche, resemble those of Sardinia and Sicily. On one side may be seen green
meadows, fruit trees, flowing water, cornfields, beechwoods, &c.; on the other,
olive groves, thickets of arbutus, hedge plants the height of a tree, myrtles,
and bay; on the naked rock aloes grow and the opuntia; in gardens, dwarf
and date-palms, unprotected cycas revoluta, and orange and lemon trees;
and wide valleys are filled with lofty carob trees—so close are the boundaries
between the flora of middle Europe and of the Mediterranean. Almonds flower in
December, and peas and beans are often gathered at Christmas. At Cannosa the
date-palm ripens its fruit, and flowers are always to be seen. The Euphorbia
Dendroides grows as high as in Crete, and
rosemary bushes are frequently up to
the shoulder of a man. In August the Syrian hibiscus is violet-red and the
scarlet-red arbutus fruit hangs till Christmas. On Monte Marjan, near Spalato,
where Diocletian had his parks, the sheltered aspect creates a tropical climate.
Wild aloes grow 6 ft. high, and in midwinter numbers of field flowers may be
picked as if it were spring.
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