IGH16 - Hydrogeology Theme
This geological theme is a very specialised one which will eventually select only a handful of sites which are important for their exceptional characteristics. The kinds of sites to be examined include warm springs, other non-karstic springs, or sites which demonstrate particular hydrogeological processes or unusual water chemistry. Some of the warm springs known around the country have been tapped for public or private supplies or to make sure of the heat, so the number of sites will probably be quite small, but they will be worth flagging as NHAs for their unusual nature.