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ironstone |
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ironstone 1. any rock consisting mainly of an iron-bearing ore 2. a tough durable earthenware ironstone [′īยทərn‚stōn] (petrology) An iron-rich sedimentary rock, either deposited directly as a ferruginous sediment or resulting from chemical replacement. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| The Yagba and Batis prospects currently cover at least five substantial west-northwest trending gold in soil anomalies (30 ppb Au threshold with more intense eyes of greater than 100 ppb Au) of 1,500-2,500 metres length, that are underlain by an intercalated sequence of banded ironstones, chlorite-sericite schists, amphibolites and quartz-biotite schists (greywackes). The anomaly is underlain by banded ironstones, schists with alteration similar to that within the Bambari Permits suggesting that the belt is of Archaean age. Overlying the ironstone on the flanks of the fold are highly weathered saprolitic clays, poorly developed ironstones and cherts. |
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