The largest site is Bradgate Park and Cropston Reservoir at . It has rocks dating to the Ediacaran period around 600 million years ago, and is very important for the study of Precambrian palaeontology.
Bradgate Park and Cropston Reservoir are the biggest sites with rock formations from the Ediacaran period, approximately 600 million years old, which are crucial for understanding Precambrian paleontology.