North American species of Tempskya and their stratigraphic significance Ash, Sidney R. 1928- creator author. Read, C. B. author. Zeller, Robert A. author. Geological Survey (U.S.) issuing body. text bibliography dcu 1976 monographic eng remote 1 online resource (iii, 42 pages) : illustrations, maps. 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. Title from title screen (viewed October 2, 2014). "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." Includes bibliographical references (pages 36-40) and index. n-us-nm Paleobotany Cretaceous Paleobotany New Mexico Hidalgo County Ferns, Fossil Geology, Stratigraphic Cretaceous Cretaceous Geologic Period Geology, Stratigraphic Paleobotany New Mexico Hidalgo County From 65 to 140 million years ago fast I 19.16:874 I 19.16:874 Stratigraphy and age of the Tempskya-bearing rocks of southern Hidalgo County, New Mexico North American species of Tempskya and their stratigraphic significance Ash, Sidney R., 1928-. (DLC) 75619201 (OCoLC)1528849 Geological Survey professional paper ; 874 https://purl.fdlp.gov/GPO/gpo89166 COP 141123 20211120182718.0 in00004007439 eng