2.2 Igneous Rock Flashcards Preview

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Flashcards in 2.2 Igneous Rock Deck (14):
1

Rock formed from the cooling and solidification of magma beneath the Earth's surface

Intrusive Igneous Rock

2

Rock that forms as a result of volcanic activity at or near the Earth's surface

Extrusive Igneous Rock

3

Hot, liquid rock

Magma

4

Light-colored rock made from rich elements such as aluminum, potassium, silicon, and sodium

Felsic Rock

5

Dark-colored rocks rich in calcium, iron, and magnesium, but poor in silicon

Mafic Rock

6

Sheetlike intrusions that CUT ACROSS previous rock formations

Dike

7

Sheetlike intrusions that are oriented PARALLEL to previous rock units

Sills

8

The largest of all igneous rock intrusions

Batholiths

9

Intrusive bodies that are exposed over smaller areas than batholiths

Stocks

10

When lava erupts from a volcano

Lava Flow

11

Long cracks in the Earth's surface

Fissures

12

Large amounts of lava flows from fissures on to land, lava covers a large area and forms a small plain which is called a _______

Lava Plateau

13

Forms when a dike or sill is exposed to the surface. The rock around it erodes away and only the igneous rock is left behind

Volcanic Neck

14

Magma that reaches the Earth's surface

Lava