I have to admit, I was beginning to wonder where Prof Rory Mortimore’s update of his excellent Chalk of Sussex and Kent was. And now I know. It wasn’t a second edition he was working on, but this magnificent magnum opus in two volumes covering a vastly greater area than that other guide. And the wait was more than worthwhile. The thoroughness, writing quality, content and publication standards are superb.

West Dorset is rightly famous for its fossils, but few people visit its wonderful, fossiliferous cliffs to look at them as landforms, rather than as an endless source of ammonites and belemnites. This guide does just that and, covers a series of itineraries in the context of landform type.

This is another of the GA’s short guides, being only 21 pages long and therefore easy to put in a cagoule pocket. Importantly, the five excursions described in the guide are centred on the city of Plymouth. Therefore, the logistics necessary to visit the itineraries should be relatively easy.

This GA guide is intended as a major guidebook to the exposures of highly significant Precambrian, Carboniferous and Permo-Triassic sediments, through to Jurassic rocks of the East Midlands. Personally, it is an area I only partly know (I know Edale in the Peak District quite well) and, for that reason, is an interesting set of locations for me.

This GA guide is stated to be a “Geology Teaching Trail”. Well, it may be, but when I ambled along the trail with the guide in my hand, I certainly wasn’t in a teaching situation. Rather, I was out for a nice walk and a guide to explain what I was seeing. And it did just that and the classic Silurian/Ordovician unconformity you can see was just that. Classic!