Igneous rocks Flashcards
1
Q
Igneous rocks
A
form when molten rock from the Earth’s mantle cools and hardens
Examples of igneous rocks include granite and basalt
2
Q
Examples of igneous rocks include
A
granite and basalt
3
Q
Igneous rocks features
A
Erode and weather very slowly
Can be categorised into two types:
Intrusive igneous rock - forms within the ground, cools slowly, and has large course crystals
Extrusive igneous rock - forms on the
Earth’s surface, and cools quickly, forming smaller crystals
Has interlocking crystals
Fewer joints and weaknesses than in other rocks
