Gingko dissecta and Metasequoia occidentalis (Dawn Redwood)
Comment: Truly superb specimen, and considered a living
fossil. The Ginkgophyta probably originated about the same time as
the Cycads during the late Paleozoic, with fossils found in North America
until the Miocene. The fan-shaped leaves of most members are quite distinctive.
This one is atypical, with deeply dissected leaves with 4 lobes that are
further divided, making the derivation of the specific name obvious. Gingko
biloba is the only extant member. The flora was dominated by conifers farther
away from the lake, and elm, birch, beech, and alder near to the lakeshore.
This plaque displays a fine example of a tree from the lacustrine
deposits of the McAbee
Flora of the Eocene of British Columbia, Canada with fine
preservational details. The region was dominated by a shallow
lake. Plant matter which fell into the water was covered with
a fine layer of silt which built up over the years as a result
of deposition of diatoms which bloomed in the lake each spring
and died in the summer. This is a fine example of the preservation
for which this biota is known.