Author: Bayley, W., 1893.:
Title: The eruptive and sedimentary rocks of Pigeon Point, Minnesota and their contact phenomena. [U.S. Geol. Surv. Bull., 109.]
Description: Washington 1893. 8vo, 24.5cm. Pp. 121, 3 double-page colouded geol. maps, 1 double-page geogr. map, 12 plates (mostly of rock samples), 15 figs., notes & refs., ,index. Stapled as issued in orig. printed wrappers, uncut. - Scarce original printing.

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