INDIAN OCEAN STUDIES. PART I. PHYSICAL GEOGRAPHY RECONNAISSANCE: LAS BELA COASTAL PLAIN, WEST PAKISTAN.
LOUISIANA STATE UNIV BATON ROUGE COASTAL STUDIES INST
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A geomorphologic description and physical changes which occurred during the Quaternary in the Las Bela Valley form the basis of this study. A climatically arid region, broken occassionally by winter and summer rainfall, has resulted with barren landscapes covered only with sparse xerophytic vegetation. Vegetation zonation delineates areas of Recent alluvium and beaches from older dunes, gravel fans, and foothills. Enormous sand dunes deposited by southwest winds dominate the east side of the central plain. Crustal displacement associated with Alpine-Himalayan geosynclinal movement has resulted in uplifted alluvium which form terraces 10 feet high in the central plain tilting of the windblown Pleistocene sands in the east and faults across the Recent beach ridges. Raised oyster beds, barnacles, and wave cut benches are evidence that the sea has invaded the area in past times. The growth of coastal sand spits, changes in the position of mangrove growth in the lagoon, and retreat of the present coast attest to changing environments produced by deposition of the Windar River and wave activity from the sea. Author
- Geology, Geochemistry and Mineralogy