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22188C

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Image #   22188C
Name:   Petrified redwood / sequoia (Sequoia affinis)
Copyright:   Copyright 2002 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Petrified redwood / sequoia (Sequoia affinis, longitudinal section). This image of petrified redwood shows lignified cell walls of the original xylem tissue still perfectly intact. Note the bordered pits in vertical vessel elements and also in the perpendicular ray cells. Petrifaction (petrification) is an important part of the fossil record. Petrified wood typically forms in sediment in the presence of mineral-rich water. Entire forests were petrified when volcanic eruptions occurred during the Eocene epoch (50 million years ago). Eruptions caused massive landslides and buried forests in layers of mud and ash. In the absence of oxygen, the wood was preserved. In wet areas, mineral rich water seeped into the wood cells and infused cell contents (lumens) with minerals (most often a silicate, such as quartz) to create a permanent record of the past.
Magnification*: x50
Type: SEM
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   22188C 07.01.02 bordered pits plant plants ray cell redwood sequoia Sequoia affinis vessel element wood SEM petrified wood sieve tube fossil cellulose

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