huspa1-8, Exercise 1: How the water gets its minerals

Model answer:

Rain and snow soak into the rock of the hills, sink deep, and are heated by the earth. On the way they dissolve minerals from the rock, in the Buda hills mainly calcium and magnesium from limestone and dolomite, and rise again along faults. Springs differ because they follow different paths, depths and rock types, and so pick up different amounts of minerals, such as sulphate, chloride or traces of radon, and arrive at different temperatures. Analyses should be checked.