Untersuchungen fossiler Hölzer aus dem westen Vereinigten Staaten von Nordamerika

Abstract

THE Tertiary rocks of some of the south-western portions of the United States have been long known to be remarkable for the abundance and diversity of the silicified trunks of Coniferous and Angiospermous woods, often beautifully preserved, which they have yielded. In this dissertation Dr. Paul Platen, a pupil of Prof. Felix, of Leipzig, whose work on the anatomy of petrified woods is widely known, has described the structure of a considerable number of trunks, for the most part of Tertiary age, from California, Nevada, Texas, Arizona and elsewhere, including also two specimens from Alaska. The great majority of the woods have proved to be Angiospermous, and two new genera, with many new species, are attributed to the families Quercineæ, Simarubaceæ, Araliaceæ and Platanaceæ among others.

Untersuchungen fossiler Hölzer aus dem westen Vereinigten Staaten von Nordamerika.

By Dr. Paul Platen. Pp. xvi+155; with three plates. (Leipzig: Quelle and Meyer, 1908.) Price 3 marks.