The Main Tungsten Area of Boulder County Colorado
The Main Tungsten Area of Boulder County Colorado
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In our eReader you can find the full English version of the book. Read The Main Tungsten Area of Boulder County Colorado Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Main Tungsten Area of Boulder County Colorado
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The fractures occupied by the veins commonly follow one or other wall of the dike. Oc- casionally they split the dike and both walls of the vein are formed by the dike rock. In some cases the vein leaves the dike entirely and passes out into the country rock, usually at a sharp angle with the dike, leaving a thin wedge of country rock be- tween. In the northeastern area the long line of mines and pros- pects roughly parallel to Middle Boulder and Boulder Creeks from near Castle Rock to Wheelmen... is closely associated, in a large part of its course, with a narrow, but rather continuous dike of fine-grained granite. In places the entire width of the dike is occupied by the vein. In others, alteration in both the dike and the country rock has left the two quite similar in ap- pearance.
Trend of the veins: There is no regular system of veins such as characterizes certain camps. But in the Nederland and Beaver Creek part of the field, a large proportion of the veins trend be- tween north and east, ranging from due north to north 80 east.
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You can find similar books in the "Read Also" column, or choose other free books by Russell D George to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The fractures occupied by the veins commonly follow one or other wall of the dike. Oc- casionally they split the dike and both walls of the vein are formed by the dike rock. In some cases the vein leaves the dike entirely and passes out into the country rock, usually at a sharp angle with the dike, leaving a thin wedge of country rock be- tween. In the northeastern area the long line of mines and pros- pects roughly parallel to Middle Boulder and Boulder Creeks from near Castle Rock to Wheelmen... is closely associated, in a large part of its course, with a narrow, but rather continuous dike of fine-grained granite. In places the entire width of the dike is occupied by the vein. In others, alteration in both the dike and the country rock has left the two quite similar in ap- pearance.
Trend of the veins: There is no regular system of veins such as characterizes certain camps. But in the Nederland and Beaver Creek part of the field, a large proportion of the veins trend be- tween north and east, ranging from due north to north 80 east.
What to read after The Main Tungsten Area of Boulder County Colorado?
You can find similar books in the "Read Also" column, or choose other free books by Russell D George to read onlineMoreLess
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