This website is made to help students prepare for their competitive exams with ease and confidence.
Q11. Which of the following stratigraphic unit(s) of the Vindhyan Supergroup contain(s) commercially significant limestone deposit(s)?
The Bhander Group (Bhander Limestone) and the Semri Group (Rohtas Formation/Limestone) are the major limestone-bearing horizons in the Vindhyan Supergroup.
Q12. Which of the following is/are copper ore mineral(s)?
Bornite (Cu5FeS4) and Covellite (CuS) are copper ores. Pentlandite is a nickel ore; Gahnite is a zinc spinel.
Q13. Which of the following is/are the driving force(s) behind plate motion?
The primary driving forces for plate tectonics are Slab-Pull (subducting lithosphere), Ridge-Push (gravity at ridges), and Mantle Convection.
Q14. Which of the natural hazard(s) listed below can be caused by Earthquakes?
Earthquakes can trigger Tsunamis (displacement of water) and Landslides (ground shaking). Cyclones and Lightning are atmospheric phenomena.
Q15. The silicate mineral(s) that commonly occur(s) in regionally metamorphosed siliceous dolomitic limestone is/are
During metamorphism of siliceous dolomitic limestone, typical minerals formed include Tremolite, Diopside, Forsterite, and Wollastonite. Cordierite is typical of pelitic rocks.
Q16. Which one of the following is the optical spectral window suitable for remote sensing?
Optical remote sensing generally covers the Visible (0.4-0.7), Near IR, SWIR, and Thermal IR regions. The range 0.4 – 14 µm encompasses these useful optical windows.
Q17. The Hoek-Brown failure envelope is typically the segment of which one of the following?
The Hoek-Brown failure criterion is non-linear and is empirically defined as a parabolic curve in principal stress space.
Q18. Which one of the following is a dinosaur?
Stegosaurus is a dinosaur. Stegodon is an extinct proboscidean (elephant relative). Equus is a horse. Otoceras is an ammonoid.
Q19. Which one of the following cross-stratifications provides the paleocurrent direction on the truncated bedding surface of an undeformed cross-stratified sedimentary strata?
Trough cross-stratification shows curved sets in plan view (on truncated surfaces) which indicate the paleocurrent direction (the concave side points downstream).
Q20. In the geological map of India, which one of the following geological units has the largest area?
The Deccan Volcanic Province covers a vast area of Peninsular India (originally >1.5 million sq km, currently ~500,000 sq km), larger than the other listed units.