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The Eocene Thunder Mountain Flora of Central Idaho
Daniel I. Axelrod
出版University of California Press, 1998-03-17
主題Nature / Plants / GeneralScience / Life Sciences / BiologyScience / Life Sciences / BotanyScience / Earth Sciences / GeologyScience / PaleontologyScience / Earth Sciences / Sedimentology & Stratigraphy
ISBN05200982349780520098237
URLhttp://books.google.com.hk/books?id=O9Tvi_WzzOEC&hl=&source=gbs_api
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註釋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 1700 m. Most species are allied to those in the western United States, but a few genera are in China. Precipitation was near 100 cm yearly, with most in summer.