GeologyRocksStrange rock
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Gus Horsley
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I don't know the precise
Wed, 07/25/2012 - 06:39I don't know the precise geology of the area but I can say it's highly likely to be iron minerals in your specimen, probably limonite. However, I've seen similar stuff from old mines in Britain and often it turns out to be highly rusted ironmongery such as old rails and assorted junk which has recemented itself into dump material. An interesting specimen though.
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Strange rock
Submitted by Ando on Tue, 07/24/2012 - 08:25.This rock was found on an old mine site in South west Queensland, Australia. Was only from 30-40 meters down maybe. I think it was found either found in Marburg Sandstone (Triassic) or the Texas beads (Jurassic) I also found some slabs of sandstone with similar features on them but more horizontal. One of the slabs had poorly sorted, but very rounded quartz pebbles on the opposite side.
The reason we were checking this mine site was this littel gem from an old record.
The party trenched along the cap of the reef. They found gold not only in the reef, but in the sandstone country rock, 7 cm away from the quartz. 250kg of this material yielded 20 Oz's of gold.