Dartmoor geology overviewAnybody with an interest in Dartmoor will happily while away a few interesting hours with the new online tool from the British Geological Survey (BGS). It is a free interactive map of the geology of the UK. The local geology is shown shaded and superimposed on a google map and you can choose satellite or map view. The opacity of the shading is alterable. Zoom down as far as 1:50 000 or up to the whole of the UK.

Click on the shaded area and the geological information comes up. Click on the name of the deposit and a new BGS info page opens. The info pages are academic so a google search for items that have caught your eye might bring you more accessible information.

It also has details about the ‘superficial’ layers. On the geological info popup there’sGeology of Drewsteignton Quarries another tab named ‘superficial’ which can give you info such as: ‘Alluvium – Clay, silt, sand and gravel’ and an info page to bounce onto.

The geology, the landscape and exploitation of the resources are given a new clarity with this tool. If you have a hankering to look further you can identify the different features on the ground using the iGeology App: http://tinyurl.com/3lnhjbr. is also for IPhone or Android.

Above you can see how the old quarry pits near Drewsteignton exploited the small outcropping of limestone. The green area is the spot where the quarries were placed.

Sourton Tor Dartmoor GeologyOn the right is the position of Sourton Tor near Meldon Reservoir; one of the few non-granite tors on Dartmoor. The tor is off the granite massif in the purple area of geology.

The edges of the granite massif and the river valleys are given a new clarity with this tool. Highly recommended whether as a way to get a different insight into Dartmoor or as a gateway to exploring the geology in greater depth.

Any insights found that you care to share, feel free to post them below.