The closest I’ve come across to the Mixon Rock which is the main focus of this website is the Calcaire de Couquèques of the Gironde region of south west France.
Formerly dated to the Lutetian I gather the Calcaire de Couquèques is now accepted as dating to the Bartonian, which now aligns it to the dating of the Mixon Rock. The former Lutetian dating might tie both deposits to the beginning of the Bartonian.
I note a great similarity of the foraminifera of both deposits. I might detail more about that at a later date.