Which one of the following is a mafic volcanic rock?
Show Hint
- Dacite
- Trachyte
- Rhyolite
- Basalt
The Correct Option is D
Solution and Explanation
Top Questions on Seismology
- Match LIST-I with LIST-II (Seismic Waves):\[\begin{array}{|c|c|} \hline \textbf{LIST-I (Type of seismic wave)} & \textbf{LIST-II (Characteristic of particle motion)} \\ \hline \text{A. Primary Wave} & \text{III. in longitudinal direction} \\ \hline \text{B. Shear Wave} & \text{IV. is perpendicular to the direction of wave propagation} \\ \hline \text{C. Love Wave} & \text{I. in horizontal plane and transverse to the direction of wave propagation} \\ \hline \text{D. Rayleigh Wave} & \text{II. in vertical plane and retrograde} \\ \hline \end{array}\]
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In seismology, Born approximation of the scattered (perturbed) wavefield is given by \[ \delta u(\mathbf{r}, \mathbf{s}; t) \approx \int_V \delta r(\mathbf{x}) \left(u_0(\mathbf{x}, \mathbf{s}; t) _t u_0(\mathbf{r}, \mathbf{x}; t)\right) \, d\mathbf{x}. \] Here, \( _t \) denotes temporal convolution, \( \delta r(\mathbf{x}) \) is the strength of the scatterer at \( \mathbf{x} \) in volume \( V \), \( \delta u(\mathbf{r}, \mathbf{s}; t) \) is the scattered wavefield measured at the receiver \( \mathbf{r} \) from the source \( \mathbf{s} \), \( u_0(\mathbf{x}, \mathbf{s}; t) \) is the downgoing wavefield (to the scatterer at \( \mathbf{x} \) from the source \( \mathbf{s} \)) in the unperturbed medium, \( u_0(\mathbf{r}, \mathbf{x}; t) \) is the upgoing wavefield (to the receiver \( \mathbf{r} \) from the scatterer at \( \mathbf{x} \)) in the unperturbed medium.
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Is there any good show __________ television tonight? Select the most appropriate option to complete the above sentence.
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