Hawaiite is an aphanitic (fine-grained) volcanic rock produced by rapid cooling of lava moderately poor in silica and enriched in alkali metal oxides (potassium oxide plus sodium oxide). It is often impractical to determine the mineral composition of such a fine-grained rock, and so hawaiite is defined chemically.

Hawaiite is a volcanic rock that resembles basalt. It is generally somewhat lighter gray in color than basalt which usually is either black or dark gray. Hawaiite often contains olivine phenocrysts. Hawaiite from Hawaii (Mauna Kea lava flow in NW part of the island few kilometers from Hapuna Bay). Width of the sample is 12 cm.

Hawaiite: Mineral information, data and localities. This page is currently not sponsored. Click here to sponsor this page. for the Isles of Hawaii, USA. A term originally defined as a variety of olivine-bearing basalt in which the normative plagioclase is oligoclase or andesine. A sodium-rich trachybasalt where (Na2O-2)>K2O.

2017年11月16日 · The lumpy, grassy landscape to the right of the road results from the eruption of hawaiite, a unique type of lava that is notably stiffer and richer in silica and potassium than Mauna Loa flows. The numerous upslope cones belong to the Pu‘uloa volcanic field, which last erupted about 4,600 years ago and was the source of the hawaiite.

Hawaiite is volcanic rock that resembles basalt. It is an olivine basalt with intermediate composition between alkali olivine and mugearite. Hawaiite is available in black, brown, light to dark grey colors.

Hawaiite is an olivine basalt with a composition between alkali basalt and mugearite. It was first used as a name for some lavas found on the island of Hawaii.

hawaiite (plural hawaiites) An olivine basalt intermediate between alkali olivine and mugearite. A gem variety of olivine peridot.

Hawaiite A basalt in which the normative and modal feldspar is andesine, and with soda:potash ratio greater than 2:1. It generally, but not always, lacks normative quartz, and commonly contains normative and modal olivine.

Hawaiite is a fine-grained, hard rock that forms when bits of lava shoot out of volcanoes and reach the Earth's surface. What is Hawaiite? In this section, we will learn more about properties of …

Video shows what hawaiite means. An olivine basalt intermediate between alkali olivine and mugearite.. A gem variety of olivine peridot.. Hawaiite Meaning. ...