The international geography . dependentcourse eastward across the deltaic plain. Although as true torrential riversthe streams of the Plain of Lombardy do not attract population to theirbanks, their valleys have played an important part as strategic lines in timeof war. Configuration of the Appennines.—The Appennines present afine example of a folded mountain chain broken off abruptly on oneside by the sunken area of the Tyrrhenian depression. The parallelism ofthe successive chains is clearly shown in the northern and central Appen-nines by their arrangement en echelon so that the general sou
The international geography . dependentcourse eastward across the deltaic plain. Although as true torrential riversthe streams of the Plain of Lombardy do not attract population to theirbanks, their valleys have played an important part as strategic lines in timeof war. Configuration of the Appennines.—The Appennines present afine example of a folded mountain chain broken off abruptly on oneside by the sunken area of the Tyrrhenian depression. The parallelism ofthe successive chains is clearly shown in the northern and central Appen-nines by their arrangement en echelon so that the general south-easterlytrend of the chains, like the wings of a theatre, pushes a more easterlybefore a more westerly which gradually falls off in height and is finallybroken at the Tyrrhenian trough. Each chain thus forms a portionof the watershed until that function is taken over by a more this way—and not as a simple chain—the mountain wall, which servesi)so as a dividing line of climates, is formed between Genoa and. 356 The International Geography Ancona, and about the 44th parallel separates Northern and CentralItaly. The Northern Appennines are usually separated into the Ligurian andEtruscan from the Col di Cadibona (1,600 feet high) which separates theLigurian Appennines from the Alps, to the Bocca Serriola (2,400 feet).They have a small elevation both for crest and peaks, the highest summitbeing Monte Cimone (7,110 feet) which is crowned by a meteorologicalobservatory. The northern section of the range is formed throughout ofTertiary strata, mainly clay, which, in spite of the moderate elevation of thepasses (rarely above 3,000 feet) makes the construction and maintenanceof roads very difficult. This is true, indeed, for the whole range of theAppennines as far as Sicily. Throughout the whole range also, the outeror eastern side is cut into blocks by the valleys of parallel streamswhich flow at right angles to the direction of the chain, , the Trebbia,Panars,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectgeography, bookyear19
