Analysis of information sources in references of the Wikipedia article "Shephelah" in English language version.
Topographically, the Shephelah represents a transition zone between the Coastal Plains and the Hebron and Jerusalem Mountains. It is relatively narrow – about 8 mi. (13 km.) – in proportion to its south-north extension – about 35 mi. (60 km.). Though they form the foothills of the Judean Mountains, the Shephelah hills differ from the former in almost all respects. Structurally, they constitute a major synclinal part of the south Judean anticlinorium, composed mainly of chalky formations of Senonian-Eocene origin. Hypsographically, the Shephelah consists of two parts: a western one (the "Low Shephelah"), rising to a height of about 600 ft. (200 m.) above the Coastal Plains, and an eastern one (the "High Shephelah") about 600 ft. (200 m.) higher than the former. On the north the Shephelah borders on the tectonically conditioned Aijalon Valley, one of the main natural approaches to the Judean Mountains. The Shephelah is a region of gently sloped hills separated by the confluents of the major rivers descending into the area from the Judean Mountains. At their entrance into the Shephelah, these rivers, and several of their tributaries, form relatively wide-floored valleys that run for a considerable stretch along the border between the hill and the mountain region. Passage between these longitudinal valleys is relatively convenient, and this natural communication channel has been very important throughout history.
