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Pans, closed depressions, are a widespread feature of many of the world's drylands. By using literature survey, air photographs, topographic maps, orbital photographs and imagery, combined with field work it is possible to describe the major areas where these features occur. Their distribution is controlled to a great extent by the availability of susceptible surfaces. They also develop in certain...
The Southeast Asian Tin Belt is a north-south elongate zone 2800 km long and 400 km wide, extending from Burma (Myanmar) and Thailand to Peninsular Malaysia and the Indonesian Tin Islands. Altogether 9.6 million tonnes of tin, equivalent to 54% of the world's tin production is derived from this region.Most of the granitoids in the region can be grouped geographically into elongate provinces or belts,...
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