Igneous Rocks

Réussis tes devoirs et examens dès maintenant avec Quizwiz!

pegmatite

a very coarse grained intrusive rock

porphyry

an intrusive igneous rock with large crystals surrounded by small crystal forms when magma cools slowly at first and then rapidly

grains

most rocks are made of little particles of minerals or other rocks. it gives rocks texture.

what do geologists study when observing rocks?

the rock's mineral composition, color and texture

how is metamorphic rock formed?

when an existing rock is changed by heat, pressure, or chemical reactions

how is sedimentary rock formed?

when particles of other rocks or remians of plants and animals are pressed together

basalt

a dark colored rock that is low in silica

rhyolite

a fine grained extrusive igneous rock with a mineral composition similar to granite

granite

a generally light colored rock that has a high silica content

how is igneous rock formed?

from cooling rock or magma

what are the properities of little particles that make up minerals and other rock?

grain, size, shape, and pattern

extrusive rock

igneous rock formed from lava that erupted onto the earth's surface

intrusive rock

igneous rock that formed when magma hardens beneath the earth's surface

how is igneous rock classified?

origin, texture, and mineral composition

rock forming minerals

rocks are made of mixtures of minerals and other materials. some rocks contain only a single mineral. others contain several minerals.


Ensembles d'études connexes

intro to cinema (chapters 1,2,3,4,5,6,7,9,12)

View Set

LearningCurve Chapter 4: Consumer and Producer Surplus

View Set

U.S. history of food week 4 study guide

View Set

Applied Behavior Analysis and Change, mastery quiz, Chapter 17

View Set

Slope and writing equations of lines

View Set