Jonas Didero TAKODJOU WAMBO

Department of Earth Sciences, University of Yaoundé I, P. O. Box 812 Yaounde, Cameroon

Sylvestre GANNO

Department of Earth Sciences, University of Yaoundé I, P. O. Box 812 Yaounde, Cameroon

Aloysius AFAHNWIE NGAMBU

Department of Geology, University of Buea, P. O. Box 63 Buea, Cameroon

Emmanuel NOMO NEGUE

Department of Earth Sciences, University of Yaoundé I, P. O. Box 812 Yaounde, Cameroon

Joseph MVONDO ONDOA

Department of Earth Sciences, University of Yaoundé I, P. O. Box 812 Yaounde, Cameroon

Jean Paul NZENTI

Department of Earth Sciences, University of Yaoundé I, P. O. Box 812 Yaounde, Cameroon