300 MILLION YEAR OLD FOSSILIZED HORSETAIL [EQUISITOPSIDA]
The term ‘permocarbonian’ refers to time period[s] straddling 300 mya, and is used for events that begin in the Carboniferous period and continue into the Permian.
The horsetail here is a member of the plant kingdom, a close relative of the fern.
Dr. Josef Spacek
Charles University Hospital, Department of Pathology
Hradec Kralove, Czech Republic
Fossilized permocarbonian horsetail polished section (100x) Technique: Reflected Light