clinopyroxene

plural clinopyroxenes

1. countableuncountablechemistryAny pyroxene that has a monoclinic crystal structure.

   The alkali basalts are fine-grained in hand specimen with scattered phenocrysts of greenish olivine up to 5 mm in size. In thin section, the fine-grained groundmass is composed of intergranular olivine, clinopyroxne, plagioclase, Fe–Ti oxides and intersertal glass.

   2011, M. C. Bruce, “Geodiversity of the Southern Barrington Tops Lava Field, New South Wales: A Study in Petrology and Geochemistry”, in M. L. Augee, editor, Proceedings of the Linnean Society of New South Wales, volume 132, pages 58–9

   2 more examples

   It is well illustrated and it is good to see photographs of macrofauna and microflora of the Cambrian rocks of St Tudwal’s Peninsula; thin section photomicrographs, for example the glomeroporphyritic cluster of andesine and augitic clinopyroxene within the Bryn Crin Basaltic Trachyandesite (Plate 18, page 65), are also very welcome.

   2003, “Book Reviews: British Geological Survey Publications”, in M. R. D. Seaward, editor, The Naturalist, volume 128, number 1044, Yorkshire Naturalists’ Union, page 118

   Abundant phenocrysts and glomerocrysts of altered olivine and fresh clinopyroxene, up to 2 mm across, occur with sporadic microphenocrysts of opaque iron oxide and alkali feldspar (Figure 3.1). The olivine is replaced by carbonate and clay. Euhedral clinopyroxenes are sometimes partially resorbed along their margins and exhibit strong core to rim and sector growth zoning.

   2007, F. L. Sutherland et al., “Unusual Baryte-bearing Hybrid Basalt, Bourke-Byrock Area, Northern New South Wales”, in Journal and Proceedings of the Royal Society of New South Wales, volume 140, →ISSN, page 29