Sentence examples for composed of quartz from inspiring English sources

This sediment, composed of quartz, mica and feldspar, became brownstone.

For example, if a sandstone has a ρB of 2.38 grams per cubic centimetre (g/cm3) and is composed of quartz (SiO2) grains having ρG of 2.65 g/cm3, the total porosity is Apparent (effective, or net) porosity is the proportion of void space that excludes the sealed-off pores.

Soil particles falling into the three principal size categories may have various mineralogical or chemical compositions, although sand particles often are composed of quartz and feldspars, silt particles often are micaceous, and clay particles often contain layer-type aluminosilicates (the so-called clay minerals).

These rocks are composed of quartz, feldspars, biotite and hornblende.

The veins are composed of quartz, and some also contain minor calcite.

They are essentially composed of quartz, feldspars, clay minerals, carbonates and minor pyrite and Fe oxyhydroxides.

Quartz is mostly composed of single crystal quartz.

The original sediment composed of kaolinite, quartz, and water will thus have been metamorphosed into a rock composed of sillimanite and quartz, and perhaps some metastable andalusite or kyanite, depending on the details of the burial and heating history.

A jet nozzle was composed of a quartz tube with two cylindrical electrodes.

The red portions of the flow structure are cryptocrystalline or hyaline, and the white portions are composed of microcrystalline quartz.

The Silurian and Devonian sedimentary strata have an average thickness of 2,363 m and are composed of various quartz schists.