Cretaceous-Tertiary Foraminifera and Palynomorphs from Djega Section and Inferred Paleodepositional Environments, Rio Del Rey Basin, Cameroon, West Africa

Table 1

Summary of the lithostratigraphic description and inferred depositional environment for sediments studied.

Facies code	Facies name	Lithology	Structure/fossil/mineralogy	Depositional setting/Environment
Sm	Massive sandstones	Fine-medium moderately to well sorted quartz arenite with sub angular to sub-rounded grains	Massive, over 90% quartz, >5% feldspars, micas and rock fragments. Glauconite is present	Shoreface setting/Shallow marine environment
Sw	Wave rippled sandstone	Fine-medium moderately well sorted sandstones with sub angular to sub-rounded grains	over 90% quartz, >5% feldspars, micas and rock fragments. Glauconite and wave ripple marks present	Flood-tidal to ebb-tidal deposits/Lagoonal to shallow marine environment
Smc	Massive Sandstone with mudclast	Fine-medium moderately to well sorted sandstones with sub angular to sub-rounded grains, hosting grey to black millimetric mudstone fragments	Massive, with sharp bed boundaries	Flood-tidal to ebb-tidal deposits/Lagoonal to shallow marine environment
SM	Sandstone-Mudstone couplets	Sandstone with intercalations of thin laminations of dark grey to black mudstones	Parallel laminations with sharp bed boundaries	Wash-over, Flood-tidal to ebb-tidal deposits/Lagoonal to shallow marine deposits
Fm	Massively bedded shale	Dark to dark-grey with iron stained colorations. Nodular and concretion beds at irregular intervals	Poorly bedded with visible tiny pyrite crystals. Fish head and turtle-like fossils	Deep Marine environment
Fl	Parallel thin-laminated shale	Dark grey to black highly fissile shale. Forms intervals that range in thickness from 20 cm to 2.5 m	Parallel laminations/bedding, contains tiny pyrite crystals. Fish head and turtle-like fossils, as well as bivalve moulds present	Deep Marine environment