Igneous
121Roche ignée — Roche magmatique Roches magmatiques équivalentes Roche volcanique Roche plutonique rhyolite : granite : basalte  …
122Roche mafique — Roche magmatique Roches magmatiques équivalentes Roche volcanique Roche plutonique rhyolite : granite : basalte  …
123Roche magmatique — Roches magmatiques équivalentes Roche volcanique Roche plutonique rhyolite : granite : basalte  …
124Roche ulramafique — Roche magmatique Roches magmatiques équivalentes Roche volcanique Roche plutonique rhyolite : granite : basalte  …
125mica — micalike, adj. /muy keuh/, n. any member of a group of minerals, hydrous silicates of aluminum with other bases, chiefly potassium, magnesium, iron, and lithium, that separate readily into thin, tough, often transparent, and usually elastic… …
126Devonian Period — Interval of geologic time from 417 to 354 million years ago; it was the fourth period of the Paleozoic Era. During the Devonian, a giant continent was situated in the Southern Hemisphere (see Gondwana), and other landmasses were located in the… …
127Silurian Period — Interval of geologic time, 443–417 million years ago. The third period of the Paleozoic Era, the Silurian follows the Ordovician Period and precedes the Devonian. It marks the first appearance of land plants and jawed fishes. The continents were… …
128Tertiary Period — Interval of geologic time, 65–1. 8 million years ago. It constitutes the first of the two periods of the Cenozoic Era, the second being the Quaternary. The Tertiary has five subdivisions: (from oldest to youngest) the Paleocene, Eocene, Oligocene …
