accessory mineral A mineral phase within a rock whose presence does not affect the root name of the rock. For instance, the root name ‘granite’ is defined by the presence of quartz, alkali feldspar, and mica. These are the ‘essential minerals’. The presence of the mineral sphene does not affect the root name and hence would be an example of an accessory mineral. Apatite and zircon are also common accessory minerals.
More From encyclopedia.com
Root , root1 / roōt; roŏt/ • n. 1. the part of a plant that attaches it to the ground or to a support, typically underground, conveying water and nourishmen… Roots , Roots Plants have three organs: roots, stems, and leaves. Growth, flowering, food production, and storage all depend on the activities of these three… Buttress Root , buttress root A stilt root, most commonly found in large, tropical trees, that emerges adventitiously from the trunk and is flattened, so it resemble… Prop Root , prop root Any of the modified roots that arise from the stem of certain plants and provide extra support. Such stems are usually tall and slender and… Root Cap , root cap (calyptra) A cone-shaped structure that covers the root tip and develops as a result of cell division by a meristem at the root apex (see ca… zedoary , zedoary root Root of the Indian plant Curcuma zedoaria, a member of the ginger family. Used in the manufacture of flavours and bitters. zedoary (root…
About this article
Updated About encyclopedia.com content Print Article
You Might Also Like