1 Enoch 18:5; "And I proceeded towards the south; and it burns day and night there where seven hills of precious stones are, three towards the east, three towards the south. But of those towards the east, one of the colored stone, one of pearls, and one of antimony; and those towards the south of red stone. But the middle one reach up to heaven, like the Throne of God, of alabaster, and the summit of the throne of sapphire." Enoch could be describing the heavenly mirror of the Aravah watershed. The topography is the same but with an awesome facade in keeping with God's glory. Enoch 26 describes the bottom of the heavenly watershed from which a deep valley descends. This accursed valley is where the souls of the wicked are tormented. Isaiah 14 corroborates Enoch by identifying Sheol at the base of the cosmic mountain.
The line of demarcation between heaven and earth is the horizon line at dusk. The Hebrew word Erev (dusk) is cognate to Aravah. At dusk, a bright crescent of refracted light and a dark shadow cast from the earth's own atmosphere can be seen together. The blending of these two phenomena creates an ombre effect called earth's umbra. The Glory of God (refracted light) and the darkness of the deep valley's (tehom) were seen as the mirror image of the Red Sea where deep calls to deep.