Question
Compressional wave velocity is the highest in
The correct answer is
Dunite
Rock Compressional Wave Velocity Comparison
Compressional wave velocity, denoted as $V_p$, measures how fast primary seismic waves travel through a material. This velocity is influenced by factors like rock composition, density, porosity, and pressure.
Different rock types exhibit varying $V_p$ values. Here's a comparison based on typical values:
| Rock Type | Typical Compressional Wave Velocity ($V_p$) (km/s) |
|---|---|
| Granite | 5.5 - 6.5 |
| Dunite | 7.0 - 8.0+ |
| Syenite | 5.0 - 6.0 |
| Gabbro | 6.5 - 7.5 |
Dunite, an ultramafic rock primarily composed of olivine, generally has a higher density and rigidity compared to granite, syenite, and gabbro. Minerals like olivine possess inherently high seismic velocities.
Based on these typical values, Dunite shows the highest compressional wave velocity among the given rock types.
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