What Are Igneous Rocks?

The video tutorial explores igneous rocks, focusing on granite, an intrusive rock formed deep in the Earth's crust. It explains the formation of intrusive rocks like gabbro and extrusive rocks like basalt and rhyolite. The video also covers vesicular rocks such as scoria and tuff, and discusses obsidian and andesite. It highlights the prevalence of igneous rocks in Earth's crust and their various formations and characteristics.

What is the primary mineral composition of granite?

• Calcium and carbonate

• Magnesium and iron

• Quartz and feldspar

• Silicon and feldspar

Which of the following is an example of a plutonic landform?

• Grand Canyon

• Mount St. Helens

• Half Dome Mountain

• Devils Postpile

What type of rock is basalt?

• Metamorphic rock

• Intrusive igneous rock

• Extrusive igneous rock

• Sedimentary rock

How does scoria form?

• From the consolidation of volcanic ash

• From the rapid rise of magma and gas release

• From the slow cooling of magma

• From the solidification of lava without crystal formation

What is the texture of andesite known as?

• Vesicular texture

• Porphyritic texture

• Glassy texture

• Granular texture