Eva power point families of rockPresentation Transcript
Families of R ock s _____By Eva Qiu
Families of Rocks
Explain the 3 families of rocks and now they are made.
Use diagram and words to explain
In B C what type of rock are found and where they found
Google where are the rocks found in Canada
Igneous Rock is a member of the families of the Rocks. It forms from the hardening of liquid magma. Earth’s surface is composed of igneous rock. It is still being formed today.
There are two types of igneous rock which is intrusive and extrusive. A intrusive igneous rock is formed when the magma cools underground. When the magma is forced out onto the Earth’s surface that is called lava. So extrusive igneous rock is the lava which is cools on Earth’s surface.
Diagram of two types of Igneous Rock Intrusive Rock Formed from hardened magma Extrusive Rock Formed form the hardened lava Earth’s surface Earth’s crust
Igneous rock may broken into smaller pieces and it will also break in many different shapes, when it exposed at Earth’s surface. They always moving from a place to another. The precipitation wash the rocks into streams and river. So the rock which mixed with clay, sand, gravel and boulders are called sediment. When the carrier that is a river or a stream, approaches a lake or an ocean. The sedimentary rock stop his traveling and sinks to the bottom.
More and more sedimentary rock are sinking down to the lake and ocean. Then each new layer puts pressure on the layers below, finally the lower layers cement into rock . Basically, the sedimentary rock such as the sandstone which is composed with clay, sand and gravel. Here are some diagrams which will be explaining you how the sedimentary rock are made.
Sediment falls Diagram 1 of Sedimentary Rock Rock and sol particles are carried by the river and sink to the bottom until they stop at the top of sedimentary layers. .
Diagram 2 of Sedimentary Rock The new layers pressure the old one below
Diagram 3 of Sedimentary Rock After that, the old layer that is the lower sedimentary layer comes closer and then they cement into rock
The word of metamorphic which means changed in form, but the changed rock is different from the original rock in appearance. It formed below Earth’s surface, when the heat and pressure make the rock change. This kind of rock is called metamorphic rock.
What types of rocks found in BC?
There are five major of rock types in Vancouver, BC area. The most extensive are: granitic rock and metamorphic rock of the Coast and Cascade Mountain, the third rock is sedimentary rock. After that, it is younger volcanic rock.
The oldest rock found in Northern Canada
In a pinkish tract of bedrock on the eastern shore of Canada’s Hudson Bay, Quebec contains the oldest known rocks on Earth and it is formed 4.28 billion years ago! The scientists said, this discovery will can gives clues about what the planet was early in its history. The Earth was formed about 4.57billion years ago and this rocks was formed roughly 290 years later.