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McAbee Fossil Beds Plant Fossils Archive

Plant Fossils from the McAbee Fossil Beds, Kamloops Group, Tranquille Shale, Cache Creek, B.C. Canada - Geological Time: Middle Eocene

What is now thelacustrine deposits of the McAbee Flora of the Eocene of British Columbia 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.

The Ginkgophyta fossils that are found are considered living fossils. 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.

Alnus parvifolia
Gingko biloba
Gingko dissecta
Gingko dissecta Gingko dissecta and Metasequoia occidentalis (Dawn Redwood) Association
Metasequoia occidentalis (Dawn Redwood) and Alnus parvifolia  
Metasequoia occidentalis (Dawn Redwood) and Alnus parvifolia