Geological Guide to Robinswood Hill

The Jurassic rocks of Robinswood Hill are of the Aalenian, Toarcian, and Pliensbachian. There are six sites to visit along this trail, covering various formations.

The trail starts at the first site with the middle lias, the Dyrham Formation. This is mostly of ferruginous beds, with alternative bands of shale. Below this formation, is the Charmouth is the Mudstone Formation, although not visible, something interesting to compare geology with.

As you progress along the route, the rocks become younger, with the Marlstone Rock Formation with Iron Oolite at the middle part of the trail, and the final sites along the trail, being the Whitby Mudstone Formation and Bridport Sand Formation.

What makes this area so fascinating is that many of the major geological important sites of the UK, and indeed top collecting areas, of Charmouth, Bridport, and Whitby, the rocks can all be found along this route.

Large limestone block with fossils