GSI and UPSC aspirants, answer the following questions
GSI – Write short answer for each of the following with sketches wherever necessary
(a) Alkali-aggregate reaction in concrete.
(b) Utility of gamma-gamma logging in coal exploration.
(c) Magma-mixing model for origin of stratiform chromite deposits.
UPSC – Citing an example of Al2SiO5 ploymorphs, draw T-P phase diagram. Discuss its significance in metamorphism.