3D chemical map and a theoretical life model for Neuropteris ovata var. simonii (index fossil, Asturian, Late Pennsylvanian, Canada)
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Chemometric study of structural groups in a large frond segment of N. ovata var. simonii

3D chemical map derived by PCA from semi-quantitative FTIR data

Pinnule and rachial coalification differences revealed by the 3D chemical map

3D chemical map demonstrates interrelationship between frond architecture and functional groups

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