ROCK TYPES

Rock Cycle Process

is a continious process where rock transform from one type to another due to geological forces

Igneous rocks

form when magna cools and solidifies

weathering and erosion

breaks rock into sediments, which compact and cement to from "sedimentary rocks"

metamorphic rocks

Intense heat and pressure beneath the earth's surface

Igneous rocks

are formed through the solidifcation of magna, lava or pyroclastic materials

latin word= Ignis or fire

Intrusive

magna cools slowly undersground, forming large crystals

Extrusive(volcanic)

Lava cools rapidly on the surface, forming small crystals or glassy texture

Common location of Igenous Rocks

-Major parts of the contintents and almost all oceanic crust at around 4/5

-Near convergenet and divergent plate boundaries

Types of Magna

-Felsic

-Intermediate

-Mafic

-Ultramafic

Felsic

Contains more than 65% silica

ex. Granite, Rhyolite

Intermediate

Contains about 53% to 65% silica and has a composition between mafic and felsic

example. Diorite, Andesite

Mafic

Contains about 45 to 52% silica

ex. Basalt and Gabbro

Ultramafic

Contains less than 45% silica

ex. Peridotite

Sedimentary Rocks

Formed from sediment, which originates through process of weathering, erosion, and deposition

Derital Sediment

soild particles broken of other rocks

Chemical Sediment

Subtances extracted from solutions through inorganic processes

Detrital sedimentary rocks

formed from the accumulation of particles like gravel, sand, silt, and clay.