Kinds of Rocks According to Origin

   Kinds of Rocks According to Origin

1.    Igneous Rock

Igneous rock is the first rock to be formed on earth. It originated as magma, the molten material under the Earth's crust.

When the magma cools and hardens it becomes igneous rock.

The first minerals to crystallize as the magma hardens are silicates. They  contain magnesium and iron. The next to form are feldspars and quartz. An igneous rock that is made up of minerals with low silica content is called basic Gabbro. An Igneous rock that is made up of minerals with high silica j content is called acid. Other examples of igneous rocks are: granite, basalt,  pumice and felsite.

2. Sedimentary Rocks

Sedimentary Rocks consist of the remains of:

a.     Older rocks

b.     Ancient plants

c.     Skeleton of dead organism

For a long period of time, plants and animals decay. These organic materials are carried away by the water and are deposited in lakes, rivers, valleys and seas.

These materials are compacted and become sedimentary rocks.

Kinds of Sedimentary Rocks

a.    Detrital

These are rocks from materials that originated and carried as solid particles.

Clay minerals and quartz are examples.

b.   Chemical

These are rocks that are made of layers of minerals which were dissolved in water.

For example is a sea that dries up will leave behind halite (also known as sodium chloride or salt) and other minerals.

3.   Metomorphic Rock

Like sedimentary rock, metamorphic rock is formed from existing rock. In sedimentary rock, the older rocks are sedimentary rock, while metamorphic rock has changed its appearance and composition through intense pressure and heat.

An example is shale, a block,flaky sedimentary rock which may be changed to flat, leaf like crystals of the shiny mineral mica.

Marble is another example. It is originally limestone. Other examples are Gneiss which is originally granite while schist came from older rocks.

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Comments 75 comments

mia 6 years ago

ang ganda mo

Ekozy 6 years ago

for wat its worth,rocks are important in naija

ella 6 years ago

tnx for posting this photos did you know you have been help ohther people because of this.tnx for giving information about rocks

raffyielle 6 years ago

tnx for everythin!!!!!!!!!!

Randolf 6 years ago


the rock is cool rock cool

hello for my mama adora and all

I learn for this web please like it now!!!!

i learn that the rock have many formation but so long proses for thousands of years

also your website is beautiful and more info good website

cristian 6 years ago

salamat sa mga natutunan ko sa hub pages thanx happy birthday

angel 6 years ago

thanks to khnow what aim think joke lang

jc  5 years ago

ang ganda pag aralan ng kinds of rock

rolly 5 years ago

thanks for the trivia

alyssa 5 years ago

pang assignment lang ehehe

pamela blanco 5 years ago

pang grade skul man twon na uiptx.......chip kaa u

pamela ruth h lloren 5 years ago

love u mom and dad nce kaau mag learn ug rockx, , , , , , , , , ,

angel rose branggan 5 years ago

hay............ xalamat , naka ans. rin aqo hehehehehehehe!!!!! :)

chelsie 5 years ago

wowww,,,,,tnx co'z i make it,,k sagot din ako..

lara 5 years ago

wow ,I can answer my test tnx with the help

sharamae G.  5 years ago

wow tnx with the help hahahaha:)

sharamae gines  5 years ago

according to my book rocks are important,tnx with the help ~~~

anjanette l. luna 5 years ago

a amizing things

hana 5 years ago

an amazing

kate 5 years ago

well amazing!!!!!!!!!!!!!!!!!!!!!!

gago 5 years ago

baril kaba ang lakas ng putok mo

karen ardales 5 years ago

nice 1

tnkz po 5 years ago

ang galing

po thankyou

shyrene ygoña 5 years ago

thanks for the help

brixter nicerio 5 years ago


joyce anne dragon 5 years ago

ang ganda tlga ng kinds of rocks. :)

salamat sa nagcomment

Paul barrete mamugay 5 years ago

It is vry impormative and educational, tnx vry much.

wendell 4 years ago

ang ganda pala ng Metomorphic Rock tnx to all made

wendell 4 years ago

ang ganda pala ng Metomorphic Rock tnx to all made

stephanie fetalino 4 years ago

maraming salmat kung sino man ang gumawa nyan dahil may natutunan kami at nakakadagdag pa sa aming takdang aralin

potpot 4 years ago

tnx for the details my assignment n rn sawakas ahahahhahaha lols :)))))))

mia vargas 4 years ago

.culang pua rien ii ..

ngoy2x 4 years ago


mhei whun narca 4 years ago

tnx sa details for may assignment

lovely 4 years ago

thank you na my nalalaman na natutunan ko ang lahat na rocks :)

than 4 years ago

ang ganda grabeeeeeeeeeeeeeeeeeee!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

nikka 4 years ago

thankx .u rock my project

nikka 4 years ago

thankx .u rock my project

cj 4 years ago

tnx sau

argie 4 years ago

thanks po

jerick 4 years ago


jetter 4 years ago

ang ganda nang kinds of rocks diba(^^^)

ang ganda nang kinds of rocks ^_^ angeles 4 years ago


hahaha 4 years ago


ruthlyn ann 4 years ago

thanks its a great help 4 our contest in aloran

chathelyn v ababa 4 years ago

thanks computer you're the best you answer all the question im going to search and now i search for this i have something to answer in our class tnx computer and who made the computer she/he is very bright tnx also to whom who answer this bye for now google

from chathy cuttie ababa

anonymous 4 years ago

we must all learn without regret.... this is the only thing that no one can snatch.

tejay 4 years ago

oo nga ang ganda ng kind of Rocks

kyla 4 years ago

wow its amazing!

princess_joy20 4 years ago

wow...its so great,,,thank u!!:))

agz_23 4 years ago


genevieve 4 years ago

its so beautiful about the you many things you know

tracy joy gonzales 4 years ago

wow nalaman ko ang tunkol sa mga rocks amazing

maria pamela v. devillena 4 years ago

wow! thank you sa rocks at may natutunan ako thank you tlaga thank you rocks! :)

Patricia Denise R. Atienza 4 years ago

Thanks to your help!!!

yuhan tanio 4 years ago

thanks computer we thanks u

jessa mae 4 years ago

"huhuh...tnx ...may answer n arin

at may na learn na din....."

SHEENA 4 years ago


funny 4 years ago

super good na talaga hhhaaaaaaaaaaa!!!!!!!!!!!!!!!!!!!!!!


ERICKA 4 years ago


aldwin 4 years ago

the kinds of rocks are important in world because it gives minerals and cyrstal

nestlyn 4 years ago


lyann 4 years ago


angelica pujado 3 years ago


jalen senal 3 years ago

ok lang naman maganda

hahahahahaha 3 years ago

we dinga hahahahahahahah

nielray 3 years ago

wla nmn sagot

mrs.chance 3 years ago

,,,marami ako natutunan

arnold sacley 3 years ago

ulom amin

ciarenz 3 years ago

lalo lang akong naguluhan kasi ang gugulo niyo!!!!!!!!!............ pano naman kasi kung anu-ano yung mga sinasabi nyo nakakainis

dallas 3 years ago


dadadad 3 years ago


emmanuel wanjara 3 years ago

thanx i learn more about rocks

claire 2 years ago

oh i learn

allysa jane 2 years ago


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