The minerals are classified into following groups:- 1. Quartz Group 2. Feldspar Group 3. Mica Group 4. Amphibole Group 5. Garnet Group 6. Kaolin 7. Carbonate Group 8. Sulphide Group 9. Oxide Group 10. Sulphate Group 11. Staurolite and Talc. 1. Quartz Group: Form—Granular Colour—(Varieties of quartz) Streak—Colourless Lustre—Vitreous Cleavage—Absent Fracture—Conchoidal to uneven Hardness—7 [High] Sp. Gr.—Low to Medium. CC—SiO2 [...]
After reading this article you will learn about:- 1. Definition of Fold 2. Parts of a Fold 3. Types 4. Recognition 5. Engineering Considerations. Definition of Fold: It is frequently seen that the strata forming the earth's crust have been not only tilted out of the horizontal but also bent and buckled into folds. Such a fold may range from [...]
This article provides an example to illustrate and explain the problem on borehole. Three boreholes are sunk at 3 points of an equilateral triangle whose sides are 480 m each. Is West of Q and R is North of midpoint PQ. Boreholes and R-reach the upper surface of a rich coal seam at 100 m, 220 m, and 260 m [...]