![]() ![]() Yardang formation is facilitated by homogeneous lithology, namely by widespread weakly consolidated, sandy sediments. Yardangs can form even under semi-arid climates however, the rarity of these occurrences suggests that this requires a special association of environmental conditions. The main control on yardang formation appears to be the existence of strong unidirectional winds, in the Pannonian Basin facilitated mainly by the channeling effect of topographic lows in the surrounding mountain chains. Since the Early Holocene the system has been inactive, and demonstrates that yardangs can persist in a recognizable form for several millennia even under less arid conditions. The long temporal range of wind erosion compared to average yardang formation rates and the rarity of advanced yardang forms indicate intermittent and relatively short, most probably millennial-scale deflation periods. OSL-dated young loess, from which well-developed yardangs were sculpted, and wind-blown sands show that eolian action continued until the early Holocene. Dating of ventifact surfaces with in situ produced cosmogenic nuclides places the onset of significant wind erosion to the Early Pleistocene (1.5 Ma). Together with ventifacts, deflation hollows and wind-blown sand areas, the yardang field is part of an integrated eolian feature system driven by northerly to northwesterly winds. The length of the largest features exceeds 60 km, their height varies around 150 m. The yardang field is composed of advanced, streamlined forms and of less aerodynamic ridges separated by well- developed corridors. Here we report on the mega-yardang field of the Pannonian Basin (Hungary), which was uniquely formed under periglacial, probably semi-arid conditions, and discuss its implications on factors controlling yardang formation in general. Mega-yardangs are known to form under extremely arid, warm or in some instances moderate climates. Obviously, having various desert attractions and multiple geotourism potentials, Dasht-e Lut has the capability of being considered among global geoparks of UNESCO. Furthermore, towards developing the region geotourism, some other fun and exciting activities such as sand skiing, racings and desert rallies, endurance cycling, sun bath, star observation, camel riding and so on, are suggested. In addition, geotourism development obstacles in Lut Desert are identified, and such solutions as development of ways for access to attractions, erection of geotourism development centers, advertisement and introduction of the desert's attractions, dispatch of guides with tourists, promotion of the region security, extension of accommodations and… for better use of the potentials of the desert, are provided. The results of the studies show that Lut Desert has considerable capability for carrying out complementary studies as well as effect on economic development process in national and international levels. ![]() Using library studies, interpretation of satellite images and field studies, this study has been conducted. Such unique perspectives as the biggest Nebkhas of the world, the largest Yardangs or Kaluts of the world, the hottest point of the earth, as well as rare species of desert structures such as salt marshes and salt polygons, Gandom Beryan Hill, massive sand dunes, Barchans, clay zones in pretty shapes, saline river, etc., present a vast and diverse extension of geographical beauties and phenomena of the desert. Dasht-e Lut of Iran, a desert which contains a collection of exclusive desert relieves and geological and geomorphological records of the world. ![]() The present study aims at studying and introducing wonderful geomorphological attractions and numerous geotourism potentials of very hot paradise of the earth, e.g. Given special tectonic and climatic conditions, Iran has the most diverse land-forms and beautiful geological phenomena, which could attract many scientific, adventurous tourists and geological researchers. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |