are predominant in the study area covering over 50% (Fig.
Sandstones Aptian Granites, Gneisses, Schists, Migmatites
AGE DEPOSITIONAL BASIN ENVIRONMENT Quaternary Continental Niger Delta Tertiary Basin Pliocene Miocene Oligocene Continental Eocene Estuarine, Shallow marine Paleocene Shallow Marine, deltaic Upper Maastrichtian Fluvio-deltaic Anambra Cretaceous Basin Fluvio-deltaic Shallow Marine, deltaic Shallow Marine, deltaic Campanian Santonian Shallow Marine, deltaic Benue Trough Conician Middle Turonian Shallow Marine Cret.
The Bedonia Project is underlain by rocks of the Proterozoic Mount Andrews Migmatites
and contains a number of magnetic features (ten current targets) that may be related to intrusive mafic rocks (the host rocks for the Nova nickelcopper discovery).
Within the Garzon Massif the plutonic bodies intrude Precambrian high grade metamorphic rocks whereas in the Upper Magdalena Valley, plutonic rocks intrude migmatites
of unknown age (Alvarez, 1981; Kroonemberg, 1982; Alvarez and Linares, 1983; Velandia et al, 2001a, 2001b; Jimenez et al.
the GAC publication The Dynamics of Epeiric Seas, and the Atlas of Migmatites
published by MAC), textbooks (e.
2004), these soils were developed both from Devonian sedimentary rocks (Ponta Grossa Formation) and from Precambrian rocks such as subalcaline granites, syenites, and migmatites
This atlas of migmatites
, heterogeneous rocks often found in continental crusts, is designed for geologists and mineralogists who need a reference for identifying and classifying these substances in the field.
The Vijayan Complex rocks consists of mainly granitic gneisses, hornblende biotlite gneisses, and migmatites
formed under amphibolites facies, and are mainly confined to the eastern sector.
The latter often contains migmatites
or small bodies of enderbitic composition, otherwise plagioclase-potassium-feldspar leucosomes and granites prevail.
The extensive Orlice-Snieznik Complex is built by orthogneisses, metagranites and migmatites
with mica schists, paragneisses and phyllonites of the Stronie Group of the Lower Paleozoic and Upper Proterozoic age.
Examples are migmatites
(rocks that were once partially molten and have retained part of their melt) and dykes (magma conduits that now contain solidified magma).
The oldest formations consist of pre-Birimian migmatites
, gneisses and amphibolites underlying the Birimian rocks.