Rocks which contain above average amounts of sodium and/or potassium for the group of rocks for which it belongs. For example, the basalts of the capping stage of Hawaiian volcanoes are alkalic. They contain more sodium and/or potassium than the shield-building basalts that make the bulk of the volcano.

Glossary of volcanic terms. - University of Wisconsin Oshkosh. . 2001.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • alkalic — adj. 1. having the properties of an alkali. Opposite of {acidic}. Note: when used of aqueous solutions, it signifies that the solution has a pH greater than 7. Syn: alkaline (vs. acidic), basic [WordNet 1.5] …   The Collaborative International Dictionary of English

  • alkalic — [al kal′ik] adj. Geol. designating or of igneous rocks having an unusually large amount of alkali metals, esp. sodium and potassium …   English World dictionary

  • alkalic — /al kal ik/, adj. Geol. (of igneous rock) containing a relatively high percentage of sodium and potassium alkali. [1725 35, in sense alkaline; ALKAL(I) + IC] * * * …   Universalium

  • alkalic — adjective ælˈkælɪk Containing a relatively high proportion of alkali; alkaline …   Wiktionary

  • alkalic — [al kalɪk] adjective Geology (of a rock or mineral) richer in sodium and/or potassium than is usual for its type …   English new terms dictionary

  • alkalic — al·kal·ic …   English syllables

  • alkalic — adjective relating to or containing an alkali; having a pH greater than 7 alkaline soils derived from chalk or limestone • Syn: ↑alkaline • Ant: ↑amphoteric (for: ↑alkaline), ↑acidic ( …   Useful english dictionary

  • Superior craton — in the west. The western margin extends from northern Minnesota through eastern Manitoba to northwestern Ontario.The formation of the Superior craton is best explained within the context of 2.72 2.68 Ga accretion of small continental plates and… …   Wikipedia

  • igneous rock — Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary …   Universalium

  • Evolution of Hawaiian volcanoes — Most of the Hawaiian volcanoes (that is, the volcanoes that make up the Hawaiian Islands) go through several defined stages of evolution during their lifespans. These stages of growth are influenced by the position of the volcano in relation to… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”