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Download pdf Bulletin Volume 11-13

Bulletin Volume 11-13 by Washington Geological Survey

Bulletin Volume 11-13
Author: Washington Geological Survey
Number of Pages: 138 pages
Published Date: 01 May 2012
Publication Country: Miami Fl, United States
Language: English
ISBN: 9781231492055
File size: 42 Mb
File Name: Bulletin.Volume.11-13.pdf
Download Link: Bulletin Volume 11-13

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: ...age occur at intervals from the town of Winlock in the north to Castle Rock in the south. The lowermost beds are exposed near the town of Castle Rock. Successively higher strata are encountered to the north and the uppermost beds are exposed near Winlock. Approximately 8,000 feet of strata are involved in this section. In northern Clallam County in the vicinity of Port Crescent Eocene lavas and shales possess a total thickness of about 4,000 feet. In the central and eastern Cascade Mountains the Swank, Teanaway and Roslyn formations, all of Eocene age, have a total maximum thickness of 12,000 feet. STRATIGRAPHY. The details of the stratigraphy are given in the descriptions of each area. The most complete sections have been measured in portions of King, Pieree and Lewis counties. In the other areas the exposures are so scattered that only fragmentary sections can be made. The type marine section for western Washington is the one just described as occurring between Winlock and Castle Rock. The following lithologic subdivisions are recorded: Top of Section Feet Massive day shale, grading in places into sandy shale, as exposed along the banks of Olequa Creek south of Winlock and also in the banks of Cowlitz River in Section 5, Township 1l North, Range 2 West, at locality 239. These strata constitute the basal member of the Oligocene 600 Chiefly sandy shale grading into massive clay shale of a dark brownish gray color. Exposures of this member are not very abundant but contain occasional specimens of Vcnericardia planicoata and Tureilclla uvasana. This is the uppermost marine Eocene as yet recognized within the state 960 Shaly sandstone 100 Slightly banded sandy shale 130 Slightly carbonaceous sandy shale 50 Sandy shale 430 Laminated sandstone and sandy shale 15...

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