Loulia Quarry, near Bou Regreg, trying to reach the  Miocene- Pliocene boundary near the bottom of the pit

Erwin van der Laan drills to a depth of ~5.5 m

Ain el Beida section

In Spain:

with Wout Krijgsman & Paco Sierro

Tortonian - Messinian boundary at Gibraleon clay pit, north of Huelva (Andalucia)

In Greece:

Akrotiraki section on the island of Milos, with Johan Meulenkamp and Constantin Doukas

 In Romania:

Beautiful sections in the Southern Carpathians of Romania, e.g. at Badislava (above and below)

• Hilgen, F.J., Kuiper, K.F., Krijgsman, W., Snel, E., Van der Laan, E. (2007). Astronomical tuning as the basis for high resolution chronostratigraphy: the intricate history of the Messinian Salinity Crisis, Stratigraphy, 4, 231-238. 

• Snel, E., Marunteanu, M., Macalet, R., Meulenkamp, J.E., Van Vugt, N. (2006). Late Miocene to Early Pliocene chronostratigraphic framework for the Dacic Basin, Romania, Palaeogeogr. Palaeoclimatol. Palaeoecol., 238, 107-124. 
• Van der Laan, E., Snel, E., de Kaenel E., Hilgen, F.J. and Krijgsman, W. (2006). No major deglaciation across the Miocene–Pliocene boundary: integrated stratigraphy and astronomical tuning of the Loulja section (Bou Regreg area, NW Morocco). Paleoceanography, 21 (3): Art. No. PA3011 

• Van Hinsbergen, D.J.J., Snel, E., Garstman, S.A., Marunteanu, M. , Langereis, C.G., Wortel,M.J.R. and Meulenkamp, J.E. (2004). Vertical motions in the Aegean volcanic arc: evidence for rapid subsidence preceding volcanic activity on Milos and Aegina, Mar. Geol., 209, 329-345. 

• Snel, E., Marunteanu, M., Meulenkamp, J.E., 2001. The position of the Pontian relative to Mediterranean stages. Ber. Inst. Geol. Palaontol. Karl-Franzens Univ. Graz, 4, 13.