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France - Autun, Psaronius sp., root mantle penetrated by roots of another fern, Permian, 9 cm |
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France - Autun, Psaronius sp., stars - vascular bundles - visible in adventitious roots, Permian, 12,5 cm |
France - Autun, Sigillaria brardii, Permian, 9 cm |
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France - Autun, Psaronius sp., Permian, 6 cm |
Francja - Autun, Psaronius sp., agate in adventitious roots visible, Permian, 9,5 cm |
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France - Paris Basin, petrified wood with chalcedony, 5 cm |
France - Autun,
Sigillaria brardii,
quartz mineralisation,
Lower Permian,
diameter 5,5 - 7 cm |
France - Autun,
Sigillaria brardii,
quartz mineralisation,
Lower Permian,
diameter 4 - 4,5 cm |
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France - Autun,
Sigillaria brardii,
quartz mineralisation,
Lower Permian,
diameter 5 - 5,5 cm |
France - Autun, Psaronius sp., quartz mineralisation, Lower Permian,
7 x 9 cm |
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