Dodecanese / by J.L. Myres [and others].

  • Great Britain. Naval Intelligence Division
Date:
1943
Catalogue details

Licence: Public Domain Mark

Credit: Dodecanese / by J.L. Myres [and others]. Source: Wellcome Collection.

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    chief cultivable districts; they are usually maritime lowlands, inter- sected by steep-sided ravines, which indicate recent elevation and erosion. IV. Volcanic Rocks. It was in the Tertiary period that the Aegean depression was formed, by faulting and collapse; with many volcanic vents, represented by the craters of Nisyros and Patmos; weathered ‘necks’ of lava, in Telos, in the west end of Cos, and at Chifut Kale on the mainland opposite; obsidian (volcanic glass) in Yali island between Nisyros and Cos; hot springs in Nisyros and Calymnos; and pumice gravels on valley-sides in Calymnos and extensively opposite Cos. ‘This phase of collapse and subsidence continues. The Levitha islands west of Leros are the sunken north end of Amorgos, fractured along the present cliff-line. Other fractured coasts, with very little subsequent erosion, are seen in Calymnos, Cos, Rhodes, and Castellorizo. Volcanic rocks, though some are very hard, usually weather easily into red or black soil, exceedingly rich and very fertile as they retain much water. They yield sulphur (in Nisyros, not now worked) and have mineral springs (some still warm) which are frequented for their medicinal effects, in Calymnos, Cos, Nisyros, and Rhodes. Water-supply There are no perennial streams, except in Rhodes (q.v.); but oleanders and other shrubs, along watercourses apparently dry, indi- cate that water may be found below the shingle. Deep-seated peren- nial springs are noted in the islands where they occur, usually at the base of massive limestones or in volcanic areas. Wells are sunk in the lowlands, but seldom to great depth; and may suffice for irrigation by wooden machines worked by mules, and (recently) by European pumps driven by windmills or oil-engines. On alluvial coasts there is often quite good water close to the beach and a few feet from the surface. CHAPTER III DETAILED TOPOGRAPHICAL DESCRIPTION [See Part I]. ‘THe IsLanps In Derait (pp. 71 ff.)]
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