List of top Geology Questions on Geophysics

Based on the figure, the anorthite content of first formed plagioclase crystals from a liquid composition having 50 mole % anorthite is ......... mole % (In integer). 
 


Correct Answer: 74 mole \% 
Solution:

The figure shows a coral reef deposit at the continental margin since 120 Ma. Assuming that there was no sea-level change, the average subsidence rate of this continental margin is ......... mm/year. (Round off to three decimal places)
A mountain of height 5 km is in static equilibrium with a crustal block of zero elevation. If the density of the crust and the mantle are 2700 and 3300 kg/m\(^3\), respectively, the thickness of the mountain root (h) is ........... km. (Round off to one decimal place)
The lithostatic pressure at the base of a 35 km thick continental crust of average density of 2.8 g/cc is................ \(\times 10^8\) Pa.
Which of the following processes is/are responsible for the alternate bands of magnetic polarity observed in seafloor basalts?
The Earth's gravitational acceleration is higher at the poles compared to that at the equator due to
The S wave velocity \( V_s \) is given by \( V_s = \sqrt{\mu / \rho} \), where \( \mu \) is shear modulus and \( \rho \) is density of the medium. \( V_s \) is lower in mantle plumes than in the ambient mantle because of
Choose the correct statement about Moho.
Which one of the following observations is consistent with the solid nature of the Earth's mantle?
What is the specific name for a tabular igneous intrusion that runs parallel to the bedding planes of the country rock?
In Bowen's Reaction Series, which mineral is the first to crystallize in the discontinuous series?
Which geological era is often referred to as the "Age of Reptiles"?
The primary ore mineral of Aluminium is known as?
Which silicate structure is characterized by a single chain of \(SiO_{4}\) tetrahedra?
In which type of plate boundary is new oceanic crust typically created?
The "Discontinuity" that separates the Earth's crust from the mantle is known as?
Which of the following minerals exhibits the highest hardness on the Mohs scale?