. Bulletins of American paleontology. 16 Bulletin 295. 3. Map showing the probable maximum extent of the Campano- Maestrichtian transgression The Turonian sea extended up the Benue Valley and in it were deposited thick sequences of montmorillonitic marine shales with limestones at the base. Transitional and continental sandstones char- acterize the regressive phases (Burke and others, 1972). This sea apparently had direct connections with the Saharan area where a southward extension of the Tethys had formed an embayment in the vicinity of Hoggar and Sokoto as early as the Cenomanian (Furon, 19
. Bulletins of American paleontology. 16 Bulletin 295. 3. Map showing the probable maximum extent of the Campano- Maestrichtian transgression The Turonian sea extended up the Benue Valley and in it were deposited thick sequences of montmorillonitic marine shales with limestones at the base. Transitional and continental sandstones char- acterize the regressive phases (Burke and others, 1972). This sea apparently had direct connections with the Saharan area where a southward extension of the Tethys had formed an embayment in the vicinity of Hoggar and Sokoto as early as the Cenomanian (Furon, 1963, p. 50; Reyre, 1966, fig. 7). This embayment has been variously termed the Sokoto Embayment (Reyment, 196Sa, fig. 9) or the lullemmeden basin (Greigert, 1965; Monciardini, 1966). Ammonites from Damergou in the lullemmeden Basin share several species in common with those from Pindiga in the Benue Valley (Woods, in Falconer, 1911; Barber, 1957; Carter and others, 1963; T. F. J. Des- sauvagie, oral communication).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Paleontological Research Institution (Ithaca, N. Y. ); Columbia University. Ithaca, N. Y. , Paleontological Research Institution [etc. ]
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