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Cretaceous polar forests were temperate forests that grew at polar latitudes during the final period of the Mesozoic Era, known as the Cretaceous Period 145–66 Ma. [1] During this period, global average temperature was about 10 °C (18 °F) higher and carbon dioxide (CO 2 ) levels were approximately 1000 parts per million (ppm), 2.5 times the ...
The Hell Creek Formation was a low floodplain at the time before the sea retreated, and in the wet ground of the dense woodland, the diversity of angiosperms and conifers were present. An endless diversity of herbaceous flowering plants, ferns and moss grew in the forest understory.
Cretaceous period birds, in the Mesozoic Era. The Cretaceous is a geologic period and system from circa 145 million years ago to 66 million years ( Ma ) ago. See also the succeeding Category:Paleogene birds
It is possible that increasing animal and plant diversity were linked. The Yixian is characterized by extensive forests, dominated by trees such as ginkgoes, conifers, cycads, and seed fern trees. Ground cover plants included lycopods, horsetails, ferns, and primitive flowering plants, which were rare compared to the others. [2]
The Nemegt Formation (also known as Nemegtskaya Svita) is a geological formation in the Gobi Desert of Mongolia, dating to the Late Cretaceous. The formation consists of river channel sediments and contains fossils of fish, turtles, crocodilians, and a diverse fauna of dinosaurs, including birds.
Nestled in Olympic National Park in western Washington state, Hoh Rain Forest is like stepping into a green fantasy world with its moss-covered maples, vibrant ferns, and coniferous trees such as ...
Podozamites is an extinct genus of fossil conifer leaves. In its broader sense, it has been used as a morphogenus ( form taxon ) to refer to any broad leaved multi-veined conifer leaves. Modern broad-leaved conifers with a similar form include Agathis in the family Araucariaceae and Nageia in Podocarpaceae , with some Podozamites sensu lato ...
Cheirolepidiaceae (also spelled Cheirolepidaceae) is an extinct family of conifers.They first appeared in the Triassic, and were a diverse and common group of conifers during most of the Mesozoic era, primarily at low latitudes, [1] where they often formed a dominant element of the vegetation. [2]