Daniel I. Axelrod – författare
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4 produkter
4 produkter
Del 142 - UC Publications in Geological Sciences
Eocene Thunder Mountain Flora of Central Idaho
Häftad, Engelska, 1998
475 kr
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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.
Del 143 - UC Publications in Geological Sciences
Oligocene Haynes Creek Flora of Eastern Idaho
Häftad, Engelska, 1998
518 kr
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This flora of 70 species is dominated by deciduous trees, many with descendants in China. Precipitation was 890 mm, mean annual temperature 12.5!C, the annual range 10!C, and freezing rare. Elevation was about 1000 meters. Comparison with the Horse Prairie flora, 30 miles east and across the present continental divide, indicates that the divide was then low and discontinuous, with warmer climate to the east.
Del 145 - UC Publications in Geological Sciences
Miocene (10-12 Ma) Evergreen Laurel-Oak Forest from Carmel Valley, California
Häftad, Engelska, 2000
431 kr
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This is a study of the Miocene Carmel flora of California, an evergreen laurel-oak forest that grew in a mild temperate (mean annual temperature of 15 degrees C), frost-free climate, with annual precipitation of about 760 mm (30 in.). Collectively, the Carmel and other Miocene floras like the San Pablo and Temblor (broad-leafed deciduous trees, with few evergreen species), the Puente (evergreen oak forest with chaparral species), the Mint Canyon, Ricardo, and Tehachapi (numerous arid subtropical scrub associated with oak woodland and chaparral species) suggest they foreshadowed a similar distribution of the different California vegetation zones today.
275 kr
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