Gräfe, K.-U. and Wiedmann, J. 1998. Sequence stratigraphy on a carbonate ramp: The Late Cretaceous Basco-Cantabrian Basin ( Northern Spain ); pp. 333-341 in de Graciansky, P.-C., Handoh, I. C., Bigg, G. R., Jones, E. J. W. and Inoue, M. (1999) An ocean modeling study of the Cenomanian Atlantic: Equatorial paleo-upwelling, organic-rich sediments and the consequences for a connection between the proto-North and South Atlantic . Geophysical Research Letters 26:223-226.