Birch creek schist

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August undefined, 2024

WebIn Alaska, these rocks were once collectively referred to as the Birch Creek Schist, after exposures on Birch Creek in the Circle mining district northeast of Fairbanks (Mertie, 1937). We have recognized and mapped four, structurally juxtaposed, metamorphic sequences in the study area. From oldest to youngest, WebThe Birch Creek Schist underlies a belt fr-10 miles wide along: Marchand, D.E. (1974) Professional Paper Vol. 352, Chemical weathering, soil development, and geochemical fractionation in a part of the White Mountains, Mono and Inyo counties, California. US Geological Survey doi:10.3133/pp352j.

Montgomery County, Kansas - Kansas Historical Society

WebMay 5, 2024 · Birch Creek’s bedrock is creatively named “Birch Creek Schist.”. It is some of the oldest rock in Alaska, formed by high temperatures and pressure, which in time makes, I don’t know, science happen, and then the rock is there. Exposed rock faces line the river banks, rising a hundred feet above the water’s surface. WebBelow the junction of East and West Forks, Glen Creek flows through a canyon cut into Birch Creek Schist. The creek then flows for about a mile over glacial till and outwash sediments, to its confluence with Moose Creek The gradient of Glen Creek is fairly steep. In the main drainage, from the mouth of the creek to the junction of East and West ... impurity\u0027s lm

Stratigraphy and Geologic History of Alaska: Encyclopedia …

WebLittle Moose Creek mostly flows through Birch Creek Schist (Bundtzen, 1981). In the headwaters of Little Moose Creek, across the divide from an unnamed north fork tributary of the North Fork of Canyon Creek, a half-mile- wide band of siliceous and graphitic schist of the Keevy Peak Formation is downfaulted into the Birch Creek Schist (Hawley and … WebNamed for exposures along Forty-mile Creek, tributary to Yukon River, east-central AK. Consists of intercalated marbles and quartzites with hornblendic, micaceous, garnetiferous, and sometimes graphitic schists. ... (1898) abandoned. Its rocks assigned in part to Precambrian Birch Creek schist and in part to the Paleozoic. Source: GNU records ... WebA, VaUey of Fortymile River at mouth of Steel Creek; B, Contorted schist on ridge north of Mosquito... pre-Middle Ordovician rocks, East Fork of Willow Creek, White Mountains._____ 27 50 US Geological Survey (1973) Bulletin Vol. 1374, Placer deposits of Alaska doi:10.3133/b1374 impurity\\u0027s lq

Epidote from Birch Creek, White Mountains, Inyo Co., California, …

Birch creek schist

Birch Creek Wild and Scenic River Bureau of Land …

WebThe Marilee prospect is along and near a northeast-striking fault contact between the … WebRocks originally mapped as Totatlanika Schist by Capps (1912) and as Birch Creek Schist by Wahrhaftig (1958) are named Keevy Peak Formation. Type locality designated as exposures on northwest shoulder of Keevy Peak from point on ridge 5700 ft N 40 deg W of summit to north side of saddle about 10,000 ft N 36 deg W, Healy D-3 quad, southern AK.

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Weboften see moose, caribou, wolves, peregrine falcons, and arctic grayling. Spectacular examples of the Birch Creek schist formation are found in rock outcroppings on hillsides above the creek and along the river where sheer rock walls have resisted the erosive action of the water. Shotgun Rapids, a Class III rapid, is one such location. WebThe age of the Birch Creek Schist in the Mount Fairplay area and the Yukon-Tanana …

WebNamed Birch Creek Schist abandoned because it has doubtful value as a rock-stratigraphic unit. Brief history of usage included. Authors say Spurr (1898) considered type area to be headwaters of Birch Creek about 80 mi northeast of Fairbanks, AK. This report describes metamorphic complex in two groups: rocks of Fairbanks-Big Delta region and ... WebLimestone is highly altered, finely crystalline, schistose, and often micaceous some layers becoming more and more foliated grade into mica schist. Is about 4000 ft thick. Seems to unconformably underlie Totsen series [now known to overlie abandoned Totsen series which is same as Birch Creek schist also abandoned].

WebBirch Creek Schist is the dominant bedrock type at BONA. Quartzite is also found here, … WebThe springs are near the headwaters of Little Champion Creek along the contact of the Mount Prindle granite pluton and the Birch Creek schist. Geochemical analyses of stream sediments in this drainage and that of Champion Creek show anomalously high amounts of uranium. Up to 400 parts per million (ppm) were detected in stream sediments and ...

WebA former Au mine located in the S½ (estimated) sec. 23, T6S, R35E, MDM, 3.0 km (1.8 miles) S of Index Hill (coordinates of record), along the North Fork Birch Creek (1¾ miles S of Roberts Ranch, on the divide between Wyman Creek and Birch Creek), on National Forest wilderness land (Birch Creek Roadless Area Review & Evaluation (RARE II) Area).

WebGeologic Unit: Birch Creek Usage: No current usage. (†Birch Creek Schist (AK) or … impurity\u0027s lrWebCurrent Weather. 11:19 AM. 47° F. RealFeel® 40°. RealFeel Shade™ 38°. Air Quality … impurity\u0027s lnWebThe Birch Creek schist, of "early pre-Cambrian age" (Mertie, 1937, p. 55) is the oldest … impurity\\u0027s lpWebBirch Creek. Just north of Fairbanks, Alaska, flowing out of the low mountains and rolling … impurity\\u0027s lsWebBirch Creek WSR begins approximately one mile upstream from the confluence of Twelvemile and Birch Creeks, near Mile 94 of the Steese Highway, and ends at the Steese Highway – Birch Creek bridge, near Mile 140 of the Steese Highway, a distance of 126 river miles. ... “Spectacular schist examples are found along the river in rock ... lithium ionen batterien recyclingWebNov 18, 2024 · Composed of a series of quartz-feldspar schists and gneisses which form much of foothill ranges of Bonnifield region and parts of higher mountains to south between Nenana and Delta Rivers, and … lithium ionen batterie autoWebThe Birch Creek schist in the Stampede Creek area has been divided on the basis of llthology into several units, one of which, the schistose quartzite, is the host rock of the antimony deposits at the Stampede mine. The schistose quartzite in the Stampede Creek drainage basin is as much as 200 feet thick, and ... impurity\u0027s lp