sandkornene

Sandkornene are small rock fragments or mineral grains with typical diameters between 0.0625 and 2 millimeters. Most sandkornene consist mainly of quartz (silica), but they can also include feldspars, micas, lithic fragments and, occasionally, heavy minerals such as zircon or magnetite. The shape of sandkornene ranges from angular to well-rounded, depending on how far they have been transported and how much energy the transport medium imparted. The degree of sorting describes how uniform the grain sizes are within a sand sample.

Sandkornene originate from the weathering and breakdown of rocks, and they are moved by wind, rivers, waves and glaciers before being deposited in various environments. Common settings for sandkornene include beaches, deserts, dunes, riverbanks and continental shelves. The grain size distribution and sorting of sandkornene in a deposit provide clues about the transport processes and the provenance of the material, making sand an important element in sedimentology and environmental reconstruction.

In human use, quartz-rich sandkornene are valuable for glassmaking and other industrial applications. Handling silica-containing dust requires safety measures due to health risks associated with inhalation.