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Lesson 3

The document explains the rock cycle, detailing the formation and transformation of rocks: metamorphic rocks can become igneous through melting, while igneous rocks can weather and form sedimentary rocks through processes like compaction and cementation. It describes the processes of crystallization, lithification, and the types of sedimentary rocks, including detrimental and chemical sedimentary rocks. Additionally, it highlights how metamorphic rocks originate from pre-existing rocks and undergo changes due to heat and chemical agents.

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9 views2 pages

Lesson 3

The document explains the rock cycle, detailing the formation and transformation of rocks: metamorphic rocks can become igneous through melting, while igneous rocks can weather and form sedimentary rocks through processes like compaction and cementation. It describes the processes of crystallization, lithification, and the types of sedimentary rocks, including detrimental and chemical sedimentary rocks. Additionally, it highlights how metamorphic rocks originate from pre-existing rocks and undergo changes due to heat and chemical agents.

Uploaded by

yannamaureen777
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Earth and Life Science

Lesson 3: Rocks

Suppose you start with METAMORPHIC rocks. The Compaction - when sediment is pushed
magma cools and solidifies through the process of together by the weight of water and other
CRYSTALLIZATION which may occur either beneath sediment pushing down on it
the surface of the Earth or at the surface through
volcanic eruption. The IGNEOUS rocks will undergo Sedimentary Rocks
weathering. The eroded materials are deposited as - results from the uplift and weathering which
sediments. The sediments undergo LITHIFICATION are transported and deposited in different
to become SEDIMENTARY rocks when compacted areas
and cemented. If the SEDIMENTARY rocks are buried
deep within the Earth. They will be subjected to
heat and pressure changing them into
METAMORPHIC rocks. If the metamorphic rocks are
subjected to higher temperature, will melt forming
magmas. Likewise, igneous rocks are subjected to
heat and pressure like sedimentary rocks will be
changed to metamorphic rocks.

Cementation - happens when sediment is


glued together by the minerals such as the
Igneous Rocks silica and calcium carbonate as the mineral
- came from the latin word ignis means fire inflirate pore space between compacted
- magma consist mainly of silicon and oxygen and sediment
extrusive rocks and intrusive rocks
Detrimental sedimentary rocks - from weathered
rocks
Chemical sedimentary rocks - from soluble
materials produced by chemical weathering

Metamorphic Rocks
- came from pre-existing rocks called parent rock
- they undergo changes in the mineralogy, texture
and chemical composition by heat and chemical
agent

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