The Irumide Belt is a Mesoproterozoic terrane of deformed basement and folded supracrustals, which occurs along the southern margin of an Archaean/Palaeoproterozoic unit called the Bangweulu Block in Zambia.
The Irumide Belt comprises deformed crystalline basement units dated at 2.7 Ga and between 2.05 and 1.93 Ga, unconformably and in places structurally overlain by a supracrustal sequence of shallow water quartzites and pelites, the Muva Supergroup, in which sparse volcanic tuffs have given ages of between 1.88 and 1.85 Ga. This complex is intruded by limited granitoids at ca. 1.66-1.55 Ga and an extensive suite of syn-orogenic plutonic rocks at between 1.05 and 1.00 Ga.
Famous quotes containing the word belt:
“The shore is composed of a belt of smooth rounded white stones like paving-stones, excepting one or two short sand beaches, and is so steep that in many places a single leap will carry you into water over your head; and were it not for its remarkable transparency, that would be the last to be seen of its bottom till it rose on the opposite side. Some think it is bottomless.”
—Henry David Thoreau (1817–1862)