Image: Banded iron formation, Eyre Peninsula, South Australia
Description: Banded iron formation (11.5 cm across at its widest) from South Australia’s Lower Middleback Fe-Fm. Orangish-brown = quartz mixed with limonite Silvery-gray = hematite Here is a BIF sample from South Australia’s Lower Middleback Fe-Fm. (a.k.a. Lower Middleback Jaspilite). It is dominantly composed of silvery-gray hematite and yellowish-brown limonite (FeO(OH)·nH2O). Portions of the Lower Middleback Fe-Fm. have economic concentrations of iron & are actively mined. Stratigraphy & age: Lower Middleback Iron-Formation, Middleback Subgroup, Hutchinson Group, upper Paleoproterozoic, ~1.859-1.945 billion years or 1.81 billion years. Locality: hillslope ~3 km west of the Iron Duke Mine, southern South Middleback Range, WSW of Whyalla, northeastern Eyre Peninsula, Cleve Subdomain of the Gawler Craton, South Australia.
Title: Banded iron formation, Eyre Peninsula, South Australia
Credit: Banded iron formation (Lower Middleback Iron-Formation, Paleoproterozoic, 1.81 or 1.859-19.45 Ga; hillslope 3 km west of Iron Duke Mine, South Middleback Range, Eyre Peninsula, South Australia) 2
Author: James St. John
Usage Terms: Creative Commons Attribution 2.0
License: CC BY 2.0
License Link: http://creativecommons.org/licenses/by/2.0
Attribution Required?: Yes
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