| All three localities yield permineralized peat, which initially formed in a swampy environment. |
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| Rarely, permineralized wood is found closely associated with the limb casts. |
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| He would also have become aware that not all dinosaur bones are permineralized. |
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| Coal balls are concretions of permineralized peat formed in place. |
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| Twenty specimens permineralized by limonite and pyrite were studied. |
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| The new ptyctodontid placoderm, Materpiscis attenboroughi, preserved an intrauterine embryo connected by a permineralized umbilical cord. |
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| Cells are permineralized in some specimens and thus are measurable. |
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| Large trunks of permineralized wood attest to the latter at least. |
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