Abstract
The micromorphological investigations of the quartz sand grains from a soil each from Pakistan and Saudi Arabia revealed the following microtcxtural features: 1. angular, irregular and rounded shapes; 2. conchoidal fractures; 3. Si-precipitation; 4. rough grain surface; 5. oriented v-shapcd, dish shaped and crcsccntic chipping and upturned plates ctc .. H is concluded that in the soil from Pakistan solution of quartz and other sand grains and the subsequent precipitation of Si are the main mechanisms which bring out the microtextural changes on the sand grains, whereas by contrast in the Saudi Arabian soil abrasion and mechanical fracture are the main modifiers of the surface textures.
