Monday, February 21, 2011

Rock Formation

How are rocks formed?  Check out the following link and read about each of the 3 rock types.  What is required in order for each different rock type to form?  Give an example of each rock type and give me a bit of information about it

How rocks are formed

16 comments:

ciARRa said...

the different types of rocks are, sedementry rock, metamorphic, and igneous rock these Layers after layers of sedementry, eroded earth is deposited on top of each. These layers are pressed down more and more through time, until the bottom layers slowly turn into rock
Metamorphic rocks are rocks that have "morphed" into another kind of rock. These rocks were once igneous or sedimentary rocks. The rocks are under tons and tons of pressure, which fosters heat build up, and this causes them to change. If you exam metamorphic rock samples closely, you'll discover how flattened some of the grains in the rock are.Igneous rocks are also formed when volcanoes erupt, causing the magma to rise above the earth's surface. When magma appears above the earth, it is called lava. Igneous rocks are formed as the lava cools above ground.

Kilgore, Sydney said...

Igneous:Scoria, Pumice and Granite. This rock is formed by volcanic eruptions. In these eruptions magma is rekeased ad igneous is formed when the magma cools on the earths surface or in pockets inside the earth.

Metamorphic:schist and gneiss. They are formed by the rocks being under tons and tons of pressure and heat builds up, and this causes them to change.

Sedimentary:Shale,limestone and sandstone. It is formed by little bits of our earth being washed downstream where they settle n areas that for. These layers are pressed down more and more through time.

Park Deborah said...

Sedimentary rocks: When pieces of the earth is eroded and settles on the bottom of the ocean, through a thousand or even a million years of process of pressing down on the eroded bits of earth. They slowly turn into rocks.
Metamorphic rocks: where once a sedimentary or igneous rock but from heat and pressure changes into metamorphic rocks.
Igneous rocks: The magma when a volcano erupts is turned into igneous rock. Igneous rock is formed when lava cools above the ground. They are also formed when under the earth magma is trapped in small pockets

kiphart,shane said...

these RE THE DIFFREN TYPES of rocks sedimentry, igneous metamorphic, and igneous are also called fire rocks and and are formed either underground or above ground. Underground, they are formed when the melted rock, called magma, deep within the earth becomes trapped in small pockets. Igneous rocks are also formed when volcanoes erupt, causing the magma to rise above the earth's surface./. metamorphics rock are rocks that have morphed into other rocks. these rocks were onces sedmintery and igneous / sedimentery For thousands, even millions of years, little pieces of our earth have been eroded--broken down and worn away
by wind and water. little bits of our earth are washed downstream where they settle to the bottom of the lakes and oceans.

kiphart,shane said...

i agree wityh sydeny

anonymous said...

sedimentry rocks were formed by erosion they were broken down and worn away by wind and water.

metamorphic rock morphed from sedimentry or igneas roch the were under pressure and were forced to change form.

igneas rocks are formed under ground and the melted rock called magma got into holes and melted the rock. formed when magma rises from the ground and the magma cools.

jr miller

anonymous said...

Metamorphic:Schist and gneiss. these are formed by rocks being under tons of presure and heat builds up and causes them to change

Igneous:Scoria, Pumice and Granite. This rock is formed by volcanic eruptions. In these eruptions magma is rekeased ad igneous is formed when the magma cools on the earths surface or in pockets inside the earth.

Sedimentary:Shale,limestone and sandstone. It is formed by little bits of our earth being washed downstream where they settle n areas that for. These layers are pressed down more and more through time.

Jordan hrabour

anonymous said...

the three types of rock are sedimentary, metamophic, and igneous rock.

sedimentary: bits of rock and earth have been worn away to different places and are bulit up layers that are in the earth for thousands of years intill they get to the bottem of the layers and are turned into rock.


metomarphic:can be changed into another rock. they were once sedimentary or metamorphic rocks. the rocks build up so much pressure they can change into other rocks.

igneous: they are called fire rocks,they are formed from magma and as they cool they are igneous rock. they are also formed when volcanoes errupt.

kelly rogers

Sara said...

Sedimentary Rock: THey are formed by the small parts of earth that have eroded away and pressed down.
Some examples of this rock are; sandstone, limestone, and shale.

Metamorphic rock: They are "morphed" into other types of rock, like sedimentary and igneous but they change by being under alot of pressure. Some types are; schist, and gneiss.

Igneous Rock: "fire Rock" they can be formed under or above ground, under they are formed by megma, the megma becomes igneous rock, above they are formed when lava cools. Example are: granite, scoria, and pumice.

Kelly,
Igneous can form above or below ground. when it erupts or when there is alot of pressure either way they are formed when megma/lava cool down.

Emily Renee Heckman :) said...

There are three different types of rocks. Metamorphic, sedimentary, and igneous. To make Sedimentary rocks, layers and layers of eroded earth are pressed onto the surface and cooled into a sendimentary rocks. Metamorphic rocks are morphed into them. Igneous rocks come from volcanoes. Once it cools down, it is formed into a rock called igneous rock.

Duebber, Jenna said...

Sedimentary: Rocks are washed downstream and then pile up on top of each other and then go under a ton of heat and pressure.

That's all I had time for

dace,connor said...

Pressure is needed to form Sedimentary rock. Limestone is made from the mineral calcite. Heat is needed to form Metamorphic rock. Schist is formed from shale. Cooling is needed to form Igneous rock. Granite is formed from slow cooling in pockets of magma.

anonymous said...

There are tons of diffrent types of rocks like metamorphic rocks,sedementry rocks,and igneous. Thelayers are pressed down more through time and the bottom layer will slowly turn into a rock.

kristan dalton

anonymous said...

earls ciarra,

I agree with you because those are the diffrent types of rocks and that the bottom layers will eventually and slowly will turn into a rock.

kristan dalton

JenniferAlyssa❤ⓙⓔⓝⓝ❤ ◕‿◕ said...

Sedimentary:For thousands or millions of years, they are eroded pieces of the earth. They settle on the bottom of the ocean, lakes and rivers, they are pressed downt through time until they form a rock.

Jenn Davis said...

Igneous- ex. granite they are called fire rocks and are formed above and below the earth's surface. They are formed when volcanoes erupt. The magma cools and forms igneous rock.

Sedimentary- ex. sandstone erosion breaks down rock and deposits it on other layers of rock. Over time the layers get pushed down and the bottom layers get turned to rock

Metamorphic- ex. gneiss are rocks that have "morphed" into other rocks. They all used to be one of the other two types or rock before that. Tons and tons of pressure changes the rock.