After 1918 a steep decline set in, with changes in the structure of the industry and increasing difficulty in mining haematite.
22.
Sandur, which formed the southern boundary of the greater metropolitan region, is still known today for iron and haematite ores.
23.
Some were owned by the Kennedy Brothers Ltd . firm of Ulverston Barrow Haematite Steel Co and the Millom and Askam Iron Company.
24.
At both banded iron formations ( metamorphosed to staurolite-grade itabirites ) have been enriched to form haematite and haematite-goethite mineralisations.
25.
At both banded iron formations ( metamorphosed to staurolite-grade itabirites ) have been enriched to form haematite and haematite-goethite mineralisations.
26.
BHP identified haematite-goethite mineralization assigned to the Dales Gorge Member of the Brockman Iron Formation on the southern margin of the ranges.
27.
Nodules of haematite with highly polished surfaces have been found as well; the shiny surfaces suggest that the nodules were used to finish leather.
28.
In the intervening years, the Hodbarrow iron mines began extracting haematite from deposits between the village of Holborn Hill and the seashore at Hodbarrow.
29.
The matrix itself does not contain any metallic ions, the haematite is substituted in aluminium and titanium while the corundum is substituted in iron.
30.
The Koolan Island mine closed in 1994 after BHP had extracted 68 million tonnes of high-grade haematite ore, averaging 67 % iron.
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