Is granite permeable

Answer 1

No, being crystallized from liquid magma there are virtually no pore spaces so it has a low porosity and fluids can not flow through it very easily. However granite usually has lage open joints in it (a result of the shrinkage during cooling) and these do allow water to flow.

Answer 2

Not really. It was originally a clay (sedimentary rock) which became a shale through intens compaction (most often because of burial) which became a slate (metamorphic rock) through low-grade regional metamorphism. In general, compaction and low-grade regional metamorphism reduces porosity, so it is not really porous.

But most strikingly is its VERY low permeability. Because clay particles are very platy, they tend to align themself during compaction, making the slate and thus the shale impermeable.

That's why shale is often a cap rock of an oil reservoir, it keeps the oil from escaping.

That's why shale and slate are sometimes used as a roof cover, rain can't penetrate through because of its low permeability.

Answer 3

there Dave,

Errm ... This is a tough question. I have been on many websites and most of them have said that slate is a permeable rock but then comes a problem.

Usually on roofs, the tiles used are slate tiles. Why would builders use slate tiles on your roof if they are permeable?

Please help me find the answer to this question. It really does puzzle me.

Thankyou ...

:)

Answer 4

Slate is not porus due to the fact that in england,people use slate as a material for roofing. From that we can highly assume that slate is not porus.

Answer 5

No, i think...

Answer 6

Is slate permeble

Answer 7

Yes.