If the younger date (early Lutetian) is accepted, then Pakicetus is nearly, if not actually, contemporaneous with Rodhocetus , an early Lutetian fossil from another formation in Pakistan.

As an example, most of the stones are Lutetian Limestone from the famous Mines of Paris.

Discovery of the Recent genus Trigonognathus (Squaliformes: Etmopteridae) in the Lutetian of Landes (southwestern France).

For those wondering, Lutetian comes from an old name for the city in Roman times, Lutetia.

Geologically, the area is occupied by a vast limestone plateau of the Lutetian covered mostly in silt.