...measured by the abundance of secondary minerals resulting from rock decay. "Surveyor, 1907, 81,406. (5) Metamorphic rocks have, as a rule, a low binding...of their useful properties for road construction. FIG. 2.— SYENITE. FIG. 1.— DIORITE. FIG. 2.— GABBRO. FIG. 1.— HYPERSTHENE-GABBRO. FIG. 2.—...

...demonstrated. (4) The cementing value of rocks is, to a certain degree, measured by the abundance of secondary minerals resulting from rock decay. (5) Metamorphic...of their useful properties for road construction. i Surveyor, 1907. SI, 406. o FIG. 2,— SYENITE. FIG. 1.— DIORITE. FIG. 2,— GABBRO. FIG. 1.—...

...demonstrated. "(4) The cementing value of rocks is, to a certain degree, measured by the abundance of secondary minerals resulting from rock decay. " (5) Metamorphic...of their useful properties for road construction. " ART. 37. METHODS OF TESTING STONE. Final judgment concerning the value of stone for road purposes,...

...demonstrated. "4. The cementing value of rocks is, to a certain degree, measured by the abundance of secondary minerals resulting from rock decay. "5. Metamorphic...to a regeneration of secondary minerals and to the effect of heat and pressure. The foliated types part readily 'along planes of schistosity, and therefore,...

...demonstrated. 4. The cementing value of rocks is, to a certain degree, measured by the abundance of secondary minerals resulting from rock decay. 5. Metamorphic...therefore are not well adapted to road construction. (j. The quantitative mineral analysis of rocks serves to a certain extent as a measure of their useful...

...demonstrated. 4. The cementing value of rocks is, to a certain degree, measured by the abundance of secondary minerals resulting from rock decay. 5. Metamorphic...pressure. The foliated types part readily along planes of sehistosity, and therefore are not well adapted to road construction. (5. The quantitative mineral...

...certain degree, measured by the abundance of secondary minerals resulting from rock decay. 5. Metamorphie rocks have, as a rule, a low binding power, owing...pressure. The foliated types part readily along planes of schist osity, and therefore are not well adapted to road construction. 6. The quantitative mineral...

...of the repairs Is etlmated at $3,000. The foliated types part readily along: planes of schistoslty, and therefore are not well adapted to road construction....of their useful properties for road construction. Rock* for Road Building. The office of public roads of the U. 8. Department of Agriculture has Issued...

...demonstrated. (4) The cementing value of rocks is, to a certain degree, measured by the abundance of secondary minerals resulting from rock decay. (5) Metamorphic...their useful properties for road construction. The above is useful as showing the opinion of an American road expert in 1907 ; and the following table,...