North American species of Tempskya and their stratigraphic significance / by Sidney R. Ash and Charles B. Read, with a section on stratigraphy and age of the Tempskya-bearing rocks of southern Hidalgo County, New Mexico, by Robert A. Zeller, Jr.
A description of two new species of the Early Cretaceous tree fern Tempskya and a discussion of the characters and distribution of the other North American species.
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| Other Authors: | |
| Language: | English |
| Published: |
Washington :
U.S. Govt. Print. Off,
1976.
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| Series: | Professional paper (Geological Survey (U.S.)) ;
no. 874. |
| Subjects: | |
| Physical Description: | iii, 42 pages, 13 leaves of plates : illustrations ; 29 cm. |
| Format: | Government Document Book |
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