By Rowland W. Tabor, Ralph A. Haugerud, Edwin H. Brown, R. Scott Babcock, Robert B. Miller
About The Product
Published by way of the yankee Geophysical Union as a part of the Field journey Guidebooks Series.
The Cascade diversity is an lively north-trending volcanic arc on the western fringe of North the US (Figure 1). on the northern finish of the variety, among 47°N and 49°N, the common elevation raises, peaks turn into sharper, various small glaciers continue to exist at the better slopes, and volcanic rocks of the Cascade arc are scarce. This quarter is the North Cascades variety. The North Cascades are bounded at the west via the fore-arc basin of the Puget Lowland, at the south via the arc volcanic rocks of the principal Cascades, and at the southeast by way of the back-arc flood basalts of the Columbia Plateau. The geologic id of the variety isn't so essentially outlined to the north, however it is geographically bounded at the northeast by means of the Okanogan levels and at the northwest by way of the Fraser River, which separates the Cascades from the Coast Mountains.
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Extra resources for Accreted Terranes of the North Cascades Range, Washington: Spokane to Seattle, Washington, July 21-29, 1989
We cross the Columbia River plateau with views of plateau basalts and glacial features. In the late afternoon we make a few stops in rocks of the Methow terrane and look at the Ross ·Lake fault zone. Hills to the north are the crystalline rocks of the Okanogan gneiss dome, a middle Eocene metamorphic core complex emplaced into rocks of the Quesnel terrane. 3) Junction. Tum right onto WA 17. 0 Intersection of 1-90 and Maple Street, Spokane. Take 190 west 2 miles (3 Ian) to US 2, follow US 2 west through Reardon (22 miles/35 km) and Davenport (35 miles/56 km).
Much of this defonnation may be related to forceful emplacement of the Oval Peak into a preexisting shear zone. 0 Campsite, upper Eagle Creek. 9) Eagle Pass (-2220 mn280'); scramble south up ridge to Stop 3-2 (see discussion above). 5) Junction with Summit trail (-2040 m/6680'). Continue to right (north) on Summit trail. 9) Junction with Fish Creek trail (-1720 m/5640'); continue straight on Summit trail. 7) Trail passes campsite ("Camp Comfort") on left. 4) Ridge crest (-2220 mn280'). Excellent views of peaks to the west of Lake Chelan (Figure 11).
6) Bridge across the North Fork of the Cascade River. The junction of the north and south forks was the site of an early mining camp called Mineral Park. Prospectors stopped here on their way to the silver diggings (none could really be called mines) above Cascade Pass and beyond in Horseshoe Basin. Beyond are scattered outcrops of quartz-rich schist (metachert) on the road to Marblemount. 9) Turn left (southwest) on Irene Creek Road (USFS 1550). 5) Bridge across Cascade River. 0 Begin road miles.
Accreted Terranes of the North Cascades Range, Washington: Spokane to Seattle, Washington, July 21-29, 1989 by Rowland W. Tabor, Ralph A. Haugerud, Edwin H. Brown, R. Scott Babcock, Robert B. Miller