The below paper is an interesting reinterpretation of the depositional environment of the Birket Qarun Formation of the UNESCO World Heritage Site Wadi Al-Hitan, also known as either Valley of Whales or Zeuglodon Valley, in the Western Desert of Egypt.
The paper is:
Gee, C.T., Sander, P.M., Peters, S.E., El-Hennawy, M.T.,
Antar, M.S.M., Zalmout, I.S. and Gingerich, P.D., Fossil
burrow assemblage, not mangrove roots:
reinterpretation of the main whale-bearing layer in
the late Eocene of Wadi Al-Hitan, Egypt.
Palaeobiodiversity and Palaeoenv