Answer:
Porous rocks and pervious rocks are both types of rocks that allow the movement or flow of fluids through them, but they have distinct characteristics:
1. **Porous Rocks:**
- Porous rocks have interconnected pore spaces within their structure, allowing fluids (such as water or oil) to flow through them.
- These pore spaces can vary in size and shape, and the interconnectedness of these pores determines the permeability of the rock.
- Examples of porous rocks include sandstone, limestone, and some types of volcanic rocks.
2. **Pervious Rocks:**
- Pervious rocks, also known as permeable rocks, refer to rocks that allow the movement of fluids through them but may not necessarily have interconnected pores.
- The permeability of pervious rocks is typically lower than that of porous rocks, and fluid movement may occur through fractures, joints, or other discontinuities in the rock.
- Pervious rocks may include fractured igneous or metamorphic rocks, as well as some sedimentary rocks with significant fracturing.
In summary, porous rocks have interconnected pore spaces, while pervious rocks allow fluid movement through fractures or discontinuities in the rock mass.
