Attempts to break through by the valley roads were quickly frustrated.
Intrusions of a serpentine-like rock break through the Miocene strata north of Bhamo, and similar intrusions occur in the western ranges.
As this lower chain does not reach the snow-line, the streams rising from it are scanty, while the Santa, Pativilca and other coast-rivers which break through it from sources in the snowy chain have a greater volume from the melted snows.
At last the weatherly qualities of the ships enabled Monk to break through the Dutch line, cutting some of their ships off from the others.
As a rule, the streams flow alternately east and west down the intermont latitudinal valleys, until they break through some transverse glen in the range on the northern side of the valley.
