Mesones Group
The Mesones Group is a Cambrian geologic group in Spain. It preserves numerous soft-bodied and hard-shelled taxa such as echinoderms and trilobites. It is often stated to contain the Mansilla, Murero and Valdemiedes Formations, however just as often the Murero Formation is used to refer to the entire group, with the main lagerstätte being placed interchangeably in Mansilla, the "broader" Murero or occasionally a broader Valdemiedes.