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 Palaeoenvironments, pp.1-16.
The PDF file is at:
https://www.researchgate.net/publication/326955395_Fossil_burrow_assemblage_not_mangrove_roots_reinterpretation_of_the_main_whale-bearing_layer_in_the_late_Eocene_of_Wadi_Al-Hitan_Egypt
https://www.researchgate.net/profile/Paul_Sander2
The abstract is at:
https://link.springer.com/article/10.1007/s12549-018-0337-0
Yours,
Paul H.