List of top Geology and Geophysics Questions

A watershed has an area of 74 km\(^2\). The stream network within this watershed consists of three different stream orders. The stream lengths in each order are as follows: Ist order streams: 3 km, 2.5 km, 4 km, 3 km, 2 km, 5 km
IInd order streams: 10 km, 15 km, 7 km
IIIrd order streams: 30 km
The drainage density of the watershed is _________km/km\(^2\) (Round off to two decimal places)

The continuous series of Bowen’s reaction series is represented by

Which one of the following geophysical methods can provide information on deep Earth structures (of the order of 1000 km) with highest resolution?

A 3×3 image (Image A) has been linearly stretched to get the maximum contrast in an 8-bit display system. Digital Number (DN) values of the pixels in Image A are shown. The value of the pixel marked as '?' in the output Image B after linear stretching is ________
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On a normal fault plane dipping 60° towards east, the measured heave and throw are 5 m and 12 m, respectively. If the strike-slip component of the fault is 13 m, the magnitude of true displacement of the fault is ________m.

What is the value of the maximum shear stress in a rock, for which the state of stress is given by the following Mohr circle?

Which one of the following minerals has crystallographic axes \( a_1 = a_2 \neq c \) and all interaxial angles equal to 90°?

Choose the correct option where both organisms do NOT secrete any CaCO\(_3\) (calcite or aragonite).