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  2. Gravel - Wikipedia

    en.wikipedia.org/wiki/Gravel

    Gravel (largest fragment in this photo is about 40 mm (1.6 in)) Gravel (/ ˈ ɡ r æ v əl /) is a loose aggregation of rock fragments.Gravel occurs naturally on Earth as a result of sedimentary and erosive geological processes; it is also produced in large quantities commercially as crushed stone.

  3. Construction aggregate - Wikipedia

    en.wikipedia.org/wiki/Construction_aggregate

    In Europe, sizing ranges are specified as d/D, where the d shows the smallest and D shows the largest square mesh grating that the particles can pass. Application-specific preferred sizings are covered in European Standard EN 13043 for road construction, EN 13383 for larger armour stone, EN 12620 for concrete aggregate, EN 13242 for base layers of road construction, and EN 13450 for railway ...

  4. Boulder clay - Wikipedia

    en.wikipedia.org/wiki/Boulder_clay

    The gravel content of boulder clay varies from 1 to 99 percent and ranges in size from pebbles to boulders of large dimensions. The size, shape, and composition of these gravels vary according to the distance through which they have travelled and the hardness, structure, and composition of the bedrock source from which they have been plucked.

  5. Agricultural lime - Wikipedia

    en.wikipedia.org/wiki/Agricultural_lime

    Agricultural lime, also called aglime, agricultural limestone, garden lime or liming, is a soil additive made from pulverized limestone or chalk. The primary active component is calcium carbonate . Additional chemicals vary depending on the mineral source and may include calcium oxide .

  6. Calcarenite - Wikipedia

    en.wikipedia.org/wiki/Calcarenite

    Calcarenite is a type of limestone that is composed predominantly, more than 50 percent, of detrital (transported) sand-size (0.0625 to 2 mm in diameter), carbonate grains. The grains consist of sand-size grains of either corals , shells , ooids , intraclasts , pellets , fragments of older limestones and dolomites , other carbonate grains, or ...

  7. Grain size - Wikipedia

    en.wikipedia.org/wiki/Grain_size

    Grain size (or particle size) is the diameter of individual grains of sediment, or the lithified particles in clastic rocks. The term may also be applied to other granular materials . This is different from the crystallite size, which refers to the size of a single crystal inside a particle or grain.

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  9. Permanente Quarry - Wikipedia

    en.wikipedia.org/wiki/Permanente_Quarry

    When that venture failed, Swayne sold the property for $1500. Granite Rock Company of Watsonville bought it from the subsequent owner for $2500 to mine the limestone. In 1902 the Alvarado Sugar Company contracted with Granite Rock to produce 5,000 tons of limestone to be shipped at the rate of two carloads per day. [6]