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Books Bücher 1 - 8 von 8 in ... in joints consists in their discontinuity or intermittence, their strike and...
" ... in joints consists in their discontinuity or intermittence, their strike and dip for the short spaces in which they occur being uniform. HEADINGS. In some places joints occur within intervals so short as to break up the rock into useless blocks. For... "
The Green Schists and Associated Granites and Porphyries of Rhode Island - Seite 39
von Benjamin Kendall Emerson, Joseph Hartshorn Perry - 1907 - 74 Seiten
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Bulletin, Ausgaben 313-315

1907
...-.">(!' w IS N. r>5°-70° E19 x. :,r,'-7o° \v - - - - _ 27 E.-W. to X. 7.V E. anil N. 75° W .'id .such a mass is left as the head or wall of the quarry. PL VIII, .1, shows a' typical heading on Dix Island. PI. IX, ft, from a photograph taken at the Longfellow...
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The Granites of Maine

Thomas Nelson Dale, George Otis Smith - 1907 - 202 Seiten
...short as to break up the rock into useless blocks. For a space of 5 to 50 feet the joints may be from 6 inches to 3 feet apart. A group of close joints is...a " heading," possibly because, when practicable, N. 20°-30° E 13 N. 20°-:»° W 8 N. 32°-.r>0° 10 25 N. 35°-50° W 18 N. 55°-70° E 19 N. 55°-70°...
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Bulletin - United States Geological Survey, Ausgabe 313

Geological Survey (U.S.) - 1907
...short as to break up the rock into useless blocks. For a space of 5 to 50 feet the joints may be from 6 inches to 3 feet apart. A group of close joints is...a " heading," possibly because, when practicable, Direction. N. 12° W.-N. 15° E Number of observations. 19 N. 20°-30° E 13 N. 20°-30° W 8 N. 32°-50°...
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Bulletin - United States Geological Survey, Ausgabe 354

Geological Survey (U.S.) - 1908
...short as to break up the rock into useless blocks. For a space of 5 to 50 feet the joints may be from 6 inches to 3 feet apart. A group of close joints is...a mass is left as the head or wall of the quarry. (See Bulletin 313, Pls. VIII, A, and IX, B, also this bulletin, Pl. VI, B.) Headings afford ample ingress...
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The Chief Commercial Granites of Massachusetts, New Hampshire and Rhode Island

Thomas Nelson Dale - 1908 - 228 Seiten
...as to break up the rock into useless blocks. For a space of 5 to 50 feet the, joints may be from 6 inches to 3 feet apart. A group of close joints is...a mass is left as the head or wall of the quarry. (See Bulletin 313, Pis. VIII, A, and IX, B, also this bulletin, PI. VI, B.) Headings afford ample ingress...
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The Chief Commercial Granites of Massachusetts

Thomas Nelson Dale - 1908 - 228 Seiten
...short as to break up the rock into useless blocks. For a space of 5 to 50 feet the joints may be from 6 inches to 3 feet apart. A group of close joints is...a mass is left as the head or wall of the quarry. (See Bulletin 313, Pis. VIII, A, and IX, B, also this bulletin, Pl. VI, B.) Headings afford ample ingress...
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Bulletin - United States Geological Survey, Ausgabe 484

Geological Survey (U.S.) - 1911
...F., Simultaneous joints : Proc. Washington Acini. Sci., vol. 7, July, 1905, pp. 267-275, Pl. XIII. called by q.uarrymen a " heading," possibly because,...a mass is left as the head or wall of the quarry. (See Bulletin 313, Pis. VIII, A, and IX, 5, also Bulletin 354, PI. VI, B.) Headings afford ample ingress...
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Congressional Serial Set

1907
...as to break 'ip the rock into useless blocks. For a space of 5 to 50 feet the joints may be from 6 inches to 3 feet apart. A group of close joints is...a mass is left as the head or wall of the quarry. 1*1. VIII, .1, shows a typical heading on Di.x Island. PI. IX. H. from a photograph taken at the Longfellow...
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