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Pieces of the basalt samples from the outcrop and the drill core were also sent to analytical laboratories, for major, minor, and trace element analyses to establish the character of these rocks, but mainly for radioactive ‘dating’ analyses.
That there was evidently a burst of much accelerated radioactive decay at some point in the past. G'day Andrew, Congratulations on a very interesting article.
The next image (below left) is of charred fossil wood; and beside that is intact fossil wood (Note biro gives size perspective).
The bottom two images are of basalt with holes from former gas bubbles (left) and visible fossil tree roots in siltstone.
The pieces of wood recovered by the miners were examined and photographed, as too was the leaf imprint, but access to the ventilation shaft was not possible, nor were samples of the enclosing basalt available, having long been dumped with all the other rubble and waste rock.
However, an exploratory hole had been drilled close to where the shaft was eventually dug.