3. Contents of the slide
• Introduction
• Rock classification
– Igneous rocks
– Sedimentary rocks
– Metamorphic rocks
• Human use of rocks
• Question and Answers
5. Igneous rocks
Close-up of granite
Various granites
(cut and polished surfaces)
Specimen of highly porous pumice
An active basalt lava flow
Plutonic or intrusive rocks Volcanic or extrusive
9. Sedimentary rocks
Claystone deposited in
(Glacial Lake Missoula, Montana, USA)
carved out of the surrounding
sandstone by both mechanical
weathering and chemical weathering.
(southwestern Arizona, USA)