Papers on geology
Contributors: Ladd, Harry S. (Harry Stephen), 1899-1982; Lugn, Alvin Leonard, 1895-1976
Series: University of Iowa studies in natural history -- vol. XI, no. 8; On cover: University of Iowa studies. New ser., no.104. March 1, 1926; University of Iowa studies in natural history (1918) -- v. 11, no. 8
Publisher: The University
Published: 1926
Place of publication: Iowa City, Ia
Language: eng
Number of pages: 31
Subjects: Cystoidea; Fossil Crinoidea; Paleontology; Limestone; Sedimentation and deposition
Table of contents: title: Additional cystoids and crinoids from the Maquoketa shale of Iowa, by A. O. Thomas and H. S. Ladd.; title: A theory of origin of some limestone masses and septaria, by A. L. Lugn.; title: Methods of collection sediment samples from the Mississippi river, by A. L. Lugn.