* Porosity is a property of rocks, not a defining characteristic of any single rock type. Porosity refers to the amount of empty space within a rock.
* Metamorphic rocks form under pressure and heat. This can either:
* Reduce porosity: The pressure can squeeze out air and water spaces, making the rock denser and less porous.
* Increase porosity: Some metamorphic processes can create new spaces, increasing porosity. Think of how squeezing a sponge can make it more porous.
* The specific minerals and texture of the metamorphic rock matter. For example, a metamorphic rock with many large crystals might have more porosity than a fine-grained metamorphic rock.
So, in summary:
* Some metamorphic rocks are non-porous.
* Some metamorphic rocks are porous.
* The specific characteristics of the rock determine its porosity, not just its metamorphic origin.
Let me know if you want to delve deeper into specific examples of metamorphic rocks and their porosity!
