Geobotany pp 109-131 | Cite as

Modern and Paleocene Metasequoias: A Comparison of Foliage Morphology

  • Jerry L. Harr
  • Francis T. C. Ting


Silicified peat from the Paleocene Fort Union Group in North Dakota has been studied using thin-section and peel methods. The internal structure of foliage identified as Metasequoia sp . is well preserved and is compared to the internal morphology of M. glyptostroboides foliage.

A single vascular bundle runs the length of the leaf, with a resin canal located abaxial to it, similar to M. glyptostroboides. Two additional resin canals occur in the mesophyll just above the lower epidermis, while M. glyptostroboides forms resin canals in the leaf margins. The vascular bundle is enclosed in a sheath of parenchyma and fibers with an incomplete ring of large endodermal-like cells located outside the sheath. No transfusion tracheids have been seen in fossil material. In the fossil material, preservation of the mesophyll is insufficient to differentiate it into palisade and spongy tissues. Palisade mesophyll is dorsi-ventral in M. glyptostroboides. No stomata are found on the upper epidermis but are well preserved on the lower surface. The degree of distortion of plant tissues during peatification is readily apparent.


Vascular Bundle Bundle Sheath Leaf Section Resin Canal Abaxial Epidermis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Arnold, C. A. 1970. Eocene Age Plant Bearing Chert in Northwestern United States and Canada. GSA Abstracts with Programs, Vol. 2, No. 6, pp. 373–374.Google Scholar
  2. Arnold, C. A., and Daugherty, Lyman H. 1963. The Fern Genus Acrostichum in the Eocene Clarno Formation of Oregon. Contributions to the Museum of Paleontology, University of Michigan, Vol. 18, No. 13, pp. 205–227.Google Scholar
  3. Arnold, C. A., and Daugherty, Lyman H. 1964. A Fossil Dennstaedtioid Fern from the Eocene Clarno Formation of Oregon. Contributions to the Museum of Paleontology, University of Michigan, Vol. 19, pp. 65–88.Google Scholar
  4. Brown, R. W. 1962. Paleocene Flora of the Rocky Mountains and Great Plains. USGS Professional Paper No. 375.Google Scholar
  5. Chaney, R. W. 1951. A Revision of Fossil Sequoia and Taxodium in Western North America Based on the Recent Discovery of Metasequoia. American Philosophical Society Transactions, Vol. 40, Part 3, pp. 171–263.Google Scholar
  6. Kidston, Robert, and Lang, W. H. 1917–1921. On Old Red Sandstone Plants Showing Structure, from the Rhynie Chert Bed. Royal Society of Edinburgh Transactions, Vol. 51, pp. 761–784; Vol. 52, pp. 603–627, 643–680, 831–854, and 855–902.Google Scholar
  7. Laird, Wilson M. 1950. Geology of the South Unit, Theodore Roosevelt National Memorial Park. North Dakota Geological Survey Bulletin No. 25.Google Scholar
  8. Laird, Wilson M. 1956. Geology of the North Unit, Theodore Roosevelt National Memorial Park. North Dakota Geological Survey Bulletin No. 32.Google Scholar
  9. Mackie, William. 1916. The Rock Series of Craigbeg and Ord Hill, Rhynie. Royal Society of Edinburgh Transactions, Vol. 50, pp. 205–236.Google Scholar
  10. Morley, Thomas. 1948. On Leaf Arrangement in Metasequoia glyptostroboides. Proceedings of the NAS, Vol. 34, pp. 574–578.CrossRefGoogle Scholar
  11. Nichols, D. J., and Ting, F.T.C. 1973. Palynology of Paleocene Petrified Peat (abstract). American Association of Stratified Palynologists Annual Meeting.Google Scholar
  12. Royse, C. F., Jr. 1967. Tongue River-Sentinel Butte Contact, Western North Dakota. North Dakota Geological Survey Report No. 45.Google Scholar
  13. Schopf, J. M. 1970. Petrified Peat from a Permian Coal Bed in Antarctica. Science, Vol. 169, pp. 274–277.PubMedCrossRefGoogle Scholar
  14. Schopf, J. M. 1971. Notes on Plant Tissue Preservation and Mineralization in a Permian Deposit of Peat from Antarctica. American Journal of Science, Vol. 271, pp. 522–543.CrossRefGoogle Scholar
  15. Stanley, E. A. 1965. Upper Cretaceous and Paleocene Plant Micro-fossils from Northwestern South Dakota. Bulletin of American Paleontology, Vol. 49, No. 22, pp. 179–384.Google Scholar
  16. Sterling, Clarence. 1949. Some Features in the Morphology of Metasequoia. American Journal of Botany, Vol. 36, pp. 461–470.CrossRefGoogle Scholar
  17. Ting, F.T.C. 1972. Petrified Peat from a Paleocene Lignite in North Dakota. Science, Vol. 177, pp. 165–166.PubMedCrossRefGoogle Scholar
  18. Ting, F.T.C. 1973. Petrology and Palynology of a Silicified Sapropelic Peat from a Paleocene Lignite Bed in North Dakota. Geoscience and Man, Vol. 7, pp. 65–66.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1977

Authors and Affiliations

  • Jerry L. Harr
    • 1
  • Francis T. C. Ting
    • 1
  1. 1.West Virginia UniversityMorgantownUSA

Personalised recommendations