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An interpretation of high montane conifers in western Tertiary floras

Published online by Cambridge University Press:  08 February 2016

Daniel I. Axelrod
Daniel I. Axelrod*
Affiliation:
Department of Botany, University of California, Davis, California 95616
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Abstract

Megafossil remains of conifers allied to taxa of the high montane fir-spruce-hemlock-white pine zone often occur in relatively lowland Tertiary floras together with taxa typical of the mixed-conifer and broadleaved sclerophyll forest zones. Even though these forests are now separated in elevation by fully 1,000 m and in distance by 10–20 km or more, it has been generally accepted that the structures of the high montane conifers were transported to the basins of deposition from distant, high mountains. Several lines of evidence show that montane conifers were regular members of both mixed-conifer and montane conifer forests. They were restricted to higher elevations in the late Neogene–Quaternary; as summers became drier and hotter, the germinating seedlings failed to become established in the mixed-conifer forest zone. They were further isolated from the broadleaved sclerophyll zone, which was confined to lower levels as winters became colder and snow more frequent.

Type
Articles
Information
Paleobiology , Volume 14 , Issue 3 , Summer 1988 , pp. 301 - 306
Copyright
Copyright © The Paleontological Society 

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References

Literature Cited

Axelrod, D. I. 1941. The concept of ecospecies in Tertiary paleobotany. National Academy of Science Proceedings 27:545–551.CrossRefGoogle ScholarPubMed
Axelrod, D. I. 1944a. The Oakdale flora (California). Carnegie Institute of Washington Publication 553:147–166.Google Scholar
Axelrod, D. I. 1944b. The Sonoma flora (California). Carnegie Institute of Washington Publication 553:167–206.Google Scholar
Axelrod, D. I. 1956. Mio-Pliocene floras from west-central Nevada. University of California Publication in Geological Science 33:1–316.Google Scholar
Axelrod, D. I. 1966a. The Pleistocene Soboba flora of southern California. University of California Publication in Geological Science 60. 108 pp.Google Scholar
Axelrod, D. I. 1966b. The Eocene Copper Basin flora of northeastern Nevada. University of California Publication in Geological Science 59. 124 pp.Google Scholar
Axelrod, D. I. 1968. Tertiary floras and topographic history of the Snake River Basin, Idaho. Geological Society of America Bulletin 79:713–734.CrossRefGoogle Scholar
Axelrod, D. I. 1976a. History of the coniferous forests, California and Nevada. University of California Publication in Geological Science 70. 62 pp.Google Scholar
Axelrod, D. I. 1976b. Evolution of the Santa Lucia fir (Abies bracteata) ecosystem. Annals of the Missouri Botanical Garden 63:24–41.CrossRefGoogle Scholar
Axelrod, D. I. 1979. Desert vegetation: its age and origin. Pp. 1–72. In Goodin, J. R. and Northington, J. R. (eds.), Arid Land Plant Resources. Texas Technical University, Center for Arid and Semi-arid Studies, Austin.Google Scholar
Axelrod, D. I. 1986a. Analysis of some palaeogeographic and palaeoclimatic problems of palaeobotany. The Palaeobotanist 35:115–129.Google Scholar
Axelrod, D. I. 1986b. Cenozoic history of some western American pines. Annals of the Missouri Botanical Garden 73:565–641.CrossRefGoogle Scholar
Axelrod, D. I. 1987. The Late Oligocene Creede flora, Colorado. University of California Publication in Geological Science 130. 235 pp.Google Scholar
Becker, H. F. 1961. Oligocene plants from the upper Ruby River Basin, southwestern Montana. Geological Society of America Memoir 82. 127 pp.Google Scholar
Bonham, H. F. 1969. Geology and mineral deposits of Washoe and Storey counties, Nevada. Nevada Bureau of Mines Bulletin 70. 140 pp.Google Scholar
Brown, R. W. 1937. Additions to some fossil floras of the western United States. U.S. Geological Survey Professional Paper 186-J:163–206.Google Scholar
Chaney, R. W. 1959. Miocene floras of the Columbia Plateau. Part 1. Composition and interpretation. Carnegie Institute of Washington Publication 617:1–134.Google Scholar
Fowells, H. A. 1965. Silvics of forest trees of the United States. U.S. Department of Agriculture, Agricultural Handbook 271. 762 pp.Google Scholar
Graham, A. 1965. The Sucker Creek and Trout Creek Miocene floras of southeastern Oregon. Kent State University Bulletin, Research Series 9. 147 pp.Google Scholar
MacGinitie, H. D. 1933. The Trout Creek flora of southeastern Oregon. Carnegie Institute of Washington Publication 416:21–68.Google Scholar
McQueen, D. R. 1969. Macroscopic plant remains in recent lake sediments. Tuatara 17:13–19.Google Scholar
Raven, P. H. and Axelrod, D. I. 1978. Origin and relationships of the California flora. University of California Publication in Botany 72. 134 pp.Google Scholar
Rose, R. L. 1969. Geology of parts of the Wadsworth and Churchill Butte quadrangles, Nevada. Nevada Bureau of Mines Bulletin 71:1–27.Google Scholar
Sawyer, J. G. and Thornburgh, D. A. 1977. Montane and sub-alpine vegetation of the Klamath Mountains. Pp. 699–732. In Barbour, M. G. and Major, J. (eds.), Terrestrial Vegetation of California. Wiley-Interscience; New York.Google Scholar
Spicer, R. A. and Wolfe, J. A. 1987. Plant taphonomy of late Holocene deposits in Trinity (Clair Engle) Lake, northern California. Paleobiology 13:227–245.CrossRefGoogle Scholar
Stebbins, G. L. and Major, J. 1965. Endemism and speciation in the California flora. Ecological Monograph 35:1–35.CrossRefGoogle Scholar
Whittaker, R. H. 1961. Vegetation history of the Pacific coastal states and the “central” significance of the Klamath region. Madrono 16:5–23.Google Scholar
Willden, R. and Speed, R. C. 1974. Geology and mineral deposits of Churchill County, Nevada. Nevada Bureau of Mines and Geology Bulletin 83. 95 pp.Google Scholar