Permo-Triassic rocks of Nottingham

The city is blessed with many fine exposures of what for many years has been known as the Nottingham Castle Sandstone, but, following a very recent review of the Sherwood Sandstone Group by BGS, will now be known as the Chester Formation. Some 22 members of the Society survived the road closures due to the tram works and the Robin Hood Marathon to meet at Clifton. The Sherwood Sandstone Group has long been subdivided into three main units with different names for different regions or basins. As we can now correlate the units across the country with the aid of geophysical logs. the stratigraphy has been simplified with one name for each of the three subdivisions. A number of names have been abandoned, such as the Nottingham Castle Sandstone and Bromsgrove Sandstone, while other well-established names have become members, such as the Wildmoor Sandstone and St Bees Sandstone Members. The main aim of this rationalisation is to simplify the seamless geological map of Britain and to make the construction of 3D geological models much easier. The Mercia Mudstone Group has also recently been reviewed and its stratigraphy simplified.