Series: University of California Publications in Geological Sciences Volume: 142
By: Daniel I Axelrod
104 pages, 4 illus, 15 b&w plates, 2 tabs
An Eocene (45 Ma) flora from Thunder Mountain caldera shows that montane conifer forest species from upper slopes descended to interfinger with mixed conifer-deciduous hardwood forest on the caldera floor then near 1700m. Most species are allied to those in the USA, but a few genera are in China.
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