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Small-scale faults at high-angle from the primary bedding in the c. 2.8 Ga banded iron formation near Mount Magnet. The gap created during faulting is filled by basaltic lava flows. Photo ID 670

Small-scale faults at high-angle from the primary bedding in the c. 2.8 Ga banded iron formation near Mount Magnet. The gap created during faulting is filled by basaltic lava flows. Photo ID 670

Photograph: ivan zibra

Reference: Geological Survey of Western Australia. http://www.dmp.wa.gov.au/371.aspx