[The Petroglyph Calendar: An Archaeoastronomy Adventure]
The Petroglyph Calendar: An Archaeoastronomy Adventure, Hubert A. Allen, Jr.
1998, Hubert Allen & Associates, paper
148 pages, 3 b/w photos, 10 figures, 1 map, 6 tables, bibliography, index, notes, 5-1/2" x 8"

Self published book about the author's journey of discovery and study of a triangular shaped petroglyph located in the Sandia Mountains near Albuquerque, New Mexico. The author hypothesizes and argues that the petroglyph served as a base for a gnomon used to observe and mark the solstices, and possibly other times of the year in the calendar of prehistoric puebloan peoples.

Read a book review of this title by Joe Orman.

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