Geology quiz #1- are you a true geologist

Thought of starting a quiz in the Earth Science section mostly aimed at the sections top contributers.

Only for fun guys so no mean stuff ok!

Q1= what make chalk a suitable aquifer?

Please no cheating, answer if you genuinely know the answer.

Thanks for joining in!

Chalk is porous (up to 40%) - porosity provides storage space for water in the rock. Trouble with chalk is that the permeability may be low depending on what sort of limestone the chalk is made of.

An aquifer is a porous rock, and chalk is very porous.