Grexy Cross: 300m north of ST553.047
Site description: 3m deep ravine cut by stream.
Geology: Jurassic, Lower Oxford Clay. Thin papery pyritic shales with septarian nodules and profuse fauna.
Access: By prior arrangement e-mail for contact details.
Parking: at side of road near Grexy Cross.
Size of party: up to 5.
Education level: Research.