banded ore

banded ore

[′ban·dəd ′ȯr]
(geology)
Ore made up of layered bands composed either of the same minerals that differ from band to band in color or textures or proportion, or of different minerals.
References in periodicals archive ?
Anywhere you have greenstone belts or sedimentary basins, you get these banded ore formations that go and go for kilometres along strike length.