From the map of Nigeria, the southern landscape of the state forms part of the low plains of the Benue origin. Other parts of the state
are composed of undulating lowlands and a network of hills developed on
granites, migmatites, pegmatites and gneisses. Around the saltmining
village of Awe are a number of worn volcanic cones.
Most
parts of the state that lie within the Benue (valley are composed of
sandstones. However,) around tshe saltbearing districts of Awe, Keana
and Akiri, are detached synclinal
areas formed by localised folding. The
brine springs of Awa, Azara and Bomanda are associated with anticlinal
axes along which saltbearing beds within the synclines ) approach the
surface.
The
high land areas of the state are found towards the north, notably in
Wamba, Nassarawa t Eggon and Akwanga Local government Areas. The Eggon
rolling hills for example, rise to an average ; height of about 1,200m.
The Maloney Hill in Keffi is of historical significance.
The
state is drained by numerous fastflowing streams/rivers that take their
source from the Jos Plateau and flow into the River Benue which also
marks the state's southern boundary. Prominent among these are the Mada,
Dep, Ayini, and Farin Ruwa rivers.