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Q131. Which one of the following is a chronostratigraphic unit?
'System' refers to the actual rock strata deposited during a specific time interval. Eon, Period, and Era are geochronologic (time-only) units.
Q132. Which of the following statements is TRUE for the temperature variation with altitude in the earth's atmosphere?
Temperature rises in the stratosphere due to ozone absorbing UV radiation, but drops in the mesosphere as ozone concentration decreases.
Q133. Incorrect Himalayan stratigraphy
Tethyan is Paleozoic–Mesozoic & The Lesser Himalayan Sequence rocks are not younger than the Higher Himalayan Crystallines
Q134. An active trench is present in the vicinity of:
The Andaman & Nicobar islands lie along the convergent boundary where the Indian Plate subducts, forming an active trench.
Q135. The continuous series of Bowen's reaction series is represented by:
The continuous branch describes the evolution of plagioclase feldspar from Ca-rich (Anorthite) to Na-rich (Albite) as magma cools.
Q136. In seismic refraction surveys, the critical distance is:
The critical distance is where the refracted wave first reaches the surface. The crossover distance is where the refracted wave overtakes the direct wave (which happens further out).
Q137. Out of the following symmetry elements, which one is present in all classes of the cubic system?
The defining characteristic of the Cubic system is the presence of four 3-fold rotation axes along the body diagonals of the cube.
Q138. Which one of the following river systems forms the largest fluvio-deltaic system in the world?
The Ganges-Brahmaputra Delta (Sunderbans) is the largest river delta in the world, covering over 100,000 square kilometers.
Q139. Which one of the following layers of the Earth has the largest volume?
The Lower Mantle represents the largest percentage of Earth's volume (~55%), significantly more than the core or upper mantle.
Q140. The age range of reservoir rock in Cambay oil field is:
The main reservoir rocks in Cambay are of Eocene age (approx 56 to 34 million years ago).