Abstract
Facie Analysis and Geochemical Characteristics of Bima Formation at Wuyo, Part of Gongola Sub-Basin, Upper Benue Trough, Northeastern Nigeria Implications for Provenance, Paleoenvironment and Tectonic History
Highlights
Bima Sandstone is the name given to the continental intercalaire in the Chad Basin and Upper Benue Trough of Nigeria
LITHOSTRATIGRAPHY OF THE STUDIED SECTION The lithology of the Bima Formation usually ranges from medium to coarse grained feldspathic and calcareous sandstones
Its base is defined by a 5m grey poorly sorted, very coarse grained trough crossbedded sandstone with sub-angular grains and erosional base associated with mudclasts
Summary
Bima Sandstone is the name given to the continental intercalaire in the Chad Basin and Upper Benue Trough of Nigeria. It is the oldest sedimentary deposit in these regions. The composition of Bima Sandstone mainly arkose to quartz arenite and its depositional structures have generated wide speculations as to the source and environment of deposition. The Early Cretaceous continental Bima Sandstone (which is the formation of concern) unconformably overlies the Pan African basement rocks. In most places it represents by far the greatest proportion of the lithostratigraphic succession in the Upper Benue Trough. The Formation is divided into three siliciclastic members: lower (B1); middle (B2) and upper (B3) members
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