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adjacent Agiapuk Alaska Alexander Archipelago altered argillites basin bed rock belt calcite Carboniferous carry chiefly chloritic claim claim.—This Coast Range Coast Range granite conglomerate copper pyrite country rock Creek Dawson deposits Devonian diabase dikes diorite east Elias feet foliation fossils geology glacial Glacier Bay gold values gravel Gravina Island greenstone greenstone-schist igneous rocks Inlet intrusive iron pyrite Kasaan Bay Kasaan greenstone Ketchikan Ketchikan district Ketchikan series Kuzitrin Kuzitrin River limestone localities located massive Mesozoic metamorphism mica-schists miles mineralized zone mining Niblack Anchorage northern occur outcrop Paleozoic pegmatite phyllites plateau Port Clarence Port Clarence limestone Prince of Wales probably prospectors quartz quartz veins region Rept schist schistose sediments shear zones Silurian slates southeastern Alaska southern Stikine River tributary tunnel U. S. Geol Upper Paleozoic Vallenar Vallenar series valley Wales Island Wales series white crystalline limestone width writer
Seite 50 - Reconnaissances in the Cape Nome and Norton Bay regions, Alaska, in 1900,
Seite 34 - Island, is a lake about a mile long and a quarter of a mile broad, which is entirely surrounded by a rock rim.
Seite 14 - The two latter lie without the region under discussion, and will not be further considered. The so-called Coast range extends from near the boundary of Washington northward through British Columbia into southeastern Alaska. In British Columbia it has a width of about 100 miles, which decreases to the northward.
Seite 22 - ... several of the main subdivisions of the geological scale. In so far as the information obtained in the region here in question enables conclusions on the subject to be formed, the lowest part of the rocks, (1) consists of greenish and gray schists generally...
Seite 22 - Palaeozoic rocks of very varied region ^ appearance, and probably referable to several of the main subdivisions of the geological scale. In so far as the information obtained in the region here in question enables conclusions on the subject to be formed, the lowest part of the rocks, (1) consists of greenish and...
Seite 38 - The indications on the surface are that Prince of Wales island contains much mineral. Gold, both free milling and in sulphurets, silver, galena, copper, and iron have been found in many places, but as yet no extensive efforts have been made to demonstrate whether any of the ores mentioned exist in paying quantities. If minerals exist in other portions of the district the very limited prospecting done has failed to show it. Annette island may be an exception, and also Dall island. Some of the finest...
Seite 27 - In a previous report f the writer grouped the Carboniferous and Devonian beds of the upper White and Tanana rivers together under the name Nutzotin series. This Nutzotin series would in a measure correspond to the subdivision called Upper Paleozoic on the accompanying map, but will probably also embrace a part, at least, of the argillites which lie adjacent to the Coast range. In the report cited the limestones of Glacier bay were all put in the Nutzotin series, as they were then believed to be Carboniferous.
Seite 28 - ... black slates. The Kennicott series, however, in the Copper river of Jura-Cretaceous age is made up of fragmental rocks similar in character to the Mesozoic of southeastern Alaska. The Tertiary sediments of southeastern Alaska are chiefly Kenai, and this horizon has been identified in many parts of Alaska. Dawson's last investigation * on the geology of this northern region is a report on the Kamaloop district in southern British Columbia.