Malheur National Forest, Oregon, Willamette Meridian: Supplement 2 from "Stratigraphy and correlation of the marine Jurassic deposits of central Oregon" (Thesis)

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NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. Marine Jurassic rocks occupy an area of more than 200 square miles in the pre-Tertiary area of Central Oregon. Eight formations are recognized in a series that ranges in age from the middle Lias to the Callovian of the upper Jura. The faunas are grouped into four chronologic divisions which are not coincident with the stratigraphi divisions. The two sets of divisions may be compared in the following manner: [...].

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