Annual Report of the United States Geological Survey to the Secretary of the Interior, Teil 7

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U.S. Government Printing Office, 1900
 

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Seite 308 - This little glacier illustrates very well the rapidity of the ice retreat and shows us the processes whose results only remain in portions of the New England landscape. One quarter of a mile out from its present terminus is a hillock 220 feet high and half a mile long, with its longer axis parallel with the glacier front. It is now separated from this latter by an open valley paved with bowlders. At first sight this elevation was supposed to be a simple terminal moraine, but upon examination it proved...
Seite 18 - April 1 April 2 April 3 April 4 April 5 April 6 April 7 April 8 April 9 April 10 April 11 April 12 April 13 April 14 April 15 April 16 April 17 April 18 April 19 April 20 April 21 April 22 April 23 April 24 April 25 April 26 April 27 April 28 April 29 April 30 May 1 May 2 May 3 /b/d,BkIII,ch. 12 Ibid. 'The Psalms' Pilgrim 's Regress, Bk IX, ch.
Seite 140 - Granwacke. 1. in old name of loose signification, applied to metamorphosed, shaly sandstones that yield a tough, irregularly breaking rock, different from slate on the one hand and from quartzite on the other.
Seite 179 - ... und Quarz bestehen und gar keine oder nahezu keine Eisenmagnesiasilicate als primäre Gemengtheile enthalten. Man muss dem Autor durchaus beistimmen, wenn er die Bedeutung dieser Gesteine hervorhebt und ihre selbständige Stellung im System befürwortet. Wenn er aber sagt: „the Alaskyte group is a distinct mineral group, consisting of quartz and alkali feldspar only, and in this sense it is quite new and so a new name is given", so lässt sich dagegen einiges einwenden. Glimmerfreie granitische...
Seite 14 - Inlet, Alaska, many of the beds being from 4 to 6 ft. thick, as : ". . . hardly more than a compressed mass of carbonized wood, it being possible to pull up from the back of a seam slivers from a few inches to 3 feet in length. Stumps 1 foot to '2 feet in diameter are common . . . Indeed, in some of the local bogs resting upon the coal measures there are stems and other woody tissues that closely approximate some of the less altered varieties of the lignitic material.
Seite 151 - Silurian (Upper) , and since there is nothing present to disprove a Middle Devonian aspect I assume that to be the age. The only other Devonian locality known to me in Alaska is Kuiu Island, Saginaw Bay, in southern Alaska, south of Sitka (see Seventeenth Ann.
Seite 158 - There are probably some volcanic flows interstratified with the arkose and conglomerates, although it is not absolutely proved that those examined may not be intrusive. The series is cut by andesitebasaltic (aleutitic) lava of later age, especially along the axis of the range, where the amount of volcanic rock is very great. "Throughout the whole series the arkoses carry abundant fossil remains, both of plants and of marine organisms.
Seite 308 - The combined melting from above and below soon removed this neck, leaving the former front isolated as it stands to-day. Since its isolation it has been shrinking each summer, and now occupies less than half of its original area.
Seite 158 - ... granite. There are probably some volcanic flows interstratified with the arkose and conglomerates, although it is not absolutely proved that those examined may not be intrusive. The series is cut by andesite-basaltic (aleutitic) lava of later age, especially along the axis of the...
Seite 138 - ... valley is filled with horizontally stratified sand, in which are great angular bowlders, which are also beautifully arranged in layers. This deposit has .a generally level top, but there are many sharp hillocks formed of bunches of huge bowlders. The streams have cut deep channels through this. On each side of the chain of volcanoes which form the axis of the range the stratified rocks dip away very gently and are slightly undulating. On the Katmai side of the divide the green fossiliferous rock...

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