Annual Report of the Board of Regents of the University of Minnesota to the Governor for the Fiscal Year Ending ..., Volumes 1876-1878St. Paul Press Company, 1878 |
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Página 30
... quartz and mica . No. 6. Mica schist , with associated talcose rock . No. 7. Mica schist with veinings of calcite . No. 8. Mica schist , changed in color by heat applied since it was taken out of the well . ( Same as No. 6. ) No. 9 ...
... quartz and mica . No. 6. Mica schist , with associated talcose rock . No. 7. Mica schist with veinings of calcite . No. 8. Mica schist , changed in color by heat applied since it was taken out of the well . ( Same as No. 6. ) No. 9 ...
Página 33
... quartz 2. Finer material , principally quartz sand .. 28 per cent . 18 per cent . 3. Fine dust , ( passes through a sieve of 80 to an inch .. 54 per cent . Total .... 100 per cent . COMPOSITION OF NO . 3 . Loss by ignition ( water and ...
... quartz 2. Finer material , principally quartz sand .. 28 per cent . 18 per cent . 3. Fine dust , ( passes through a sieve of 80 to an inch .. 54 per cent . Total .... 100 per cent . COMPOSITION OF NO . 3 . Loss by ignition ( water and ...
Página 50
... quartz . The rock in some places also varies to a massive , compact hard rock with sharp jointage angles , whch , when broken , has nearly the color and texture of the staurolite crystals , if fractured . found in the rock at Pike ...
... quartz . The rock in some places also varies to a massive , compact hard rock with sharp jointage angles , whch , when broken , has nearly the color and texture of the staurolite crystals , if fractured . found in the rock at Pike ...
Página 54
... quartz , which is white and opaque , was evidently taken from some vein in the slate in this neighborhood , for the slate at Little Falls has several veins of that kind of quartz . Subsequently however , these chips were found to extend ...
... quartz , which is white and opaque , was evidently taken from some vein in the slate in this neighborhood , for the slate at Little Falls has several veins of that kind of quartz . Subsequently however , these chips were found to extend ...
Página 55
... clayey loam . 2. Gravel and sand . 3. Sand , loamy above and gravelly below ; 60 feet above the river at low water . 4. Trap dyke . 5. Slate rock . The quartz chips occur in No. 3 , and abundantly UNIVERSITY OF MINNESOTA . 55.
... clayey loam . 2. Gravel and sand . 3. Sand , loamy above and gravelly below ; 60 feet above the river at low water . 4. Trap dyke . 5. Slate rock . The quartz chips occur in No. 3 , and abundantly UNIVERSITY OF MINNESOTA . 55.
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