It is overlain conformably
by condensed hemipelagic, largely anoxic early Silurian black shale.
Massive basalt at Partridge Island, corresponding to the lower lava unit of North Mountain, conformably
overlies the Blomidon Formation.
He placed the top of the unit at the base of the conformably
overlying "red grit approximately 1 m thick containing calcareous siltstone pebbles" (p.
The depositional sequence in each subbasin typically consists of (i) a thick basal coarse-grained alluvial succession that rests unconformably on older basement rock, overlain by (ii) a dark-grey, fine-grained lacustrine succession, which is overlain conformably
to unconformably by (iii) an upper coarse- to fine-grained alluvial succession.
Our proposed unit is defined purely on the basis of lithostratigraphy, being a non-coal-bearing, red-bed succession positioned conformably
above the Boss Point Formation and conformably
beneath the coal-bearing strata of the Joggins Formation.
These older units are unconformably to conformably
overlain by the more voluminous and widespread younger and dominantly sedimentary units of the basin.
Mabou Group: Late Carboniferous sedimentation began with the Namurian Mabou Group, which conformably
overlies the Windsor Group and consists of two terrestrial sequences, the Hastings and Pomquet formations, that total 4700 m in thickness.
overlying Silurian Waweig Formation comprises approximately 4200 m of volcanic and resedimented volcaniclastic and siliciclastic sandstone and mudstone dipping moderately and uniformly to the southeast away from the Oak Bay conglomerate.
overlying lower Llandovery (Rhuddanian) beds are subdivided into lithostratigraphic units R and S assigned to the Chalmak Regional Stage.
The upper part of the Maina-Dieu group is overlain, perhaps conformably
, by Cambrian sedimentary rocks (Barr et al.
The formation conformably
overlies the Afowo Formation and Maestrichtian to Paleocene age has been assigned (Omatsola and Adegoke, 1981).
Ilaro formation conformably
overlies Oshoshun formation and composes of massive yellowish, poorly consolidated cross-bedded sandstone while the youngest stratigraphy in the basin is the Benin formation also known as coastal plain sands (Jones and Hockey, 1964).