NJV

Introduction

Here, on this presentation, you will learn all about the rocks you see everyday including metamorphic, igneous, and sedimentary rocks.

Logo of company

Igneous Rocks

This type of rock has begun when

a rock or sediment goes deep beneath Earth's surface. It then turns into magma. Magma means the rock

is cooled in melting. The hot, molten rock rises either above or beneath Earth's surface. It cools and slowly hardens in the process

The majority of rocks that you see are most Igneous Rocks. Supply and counter tops are mostly made of Granite.

Clasification: Scientists who study rocks are called Petrologists.They classify igneous rocks by mode of occurance, texture, mineralogy,

chemical composition, and last but not least, geometry of the igneous body. The main essential minerals in these type of rocks

very hard to find, or very rare.

Igneous Rocks

Metamorphic Rocks

You have learned about sedimentary and igneous rocks( a lot of info...!) , and now moving on to Metamorphic rocks. These rocks are made

up of heating up on Earth's crust. They are pressed together also either below/ above earth's surface. Most of these rocks you see are in the mountanious

regions like slate. Sometimes, fossils are found in these rocks. The full explanation of the formation of the rock is that pieces of sediment

pile together deep below the Earth's surface. The sediment piled on each other is slowly applied with heat and pressure, and there is your

metamorphic rock! An example of this is when players are layed on top of the bottom person to earn the ball. The person all the way on

the bottom is feeling the heat and pressure of all the other players on top of it. ( if you have ever seen that!..). This is how our metamorphic

rocks form! :)

Metamorphic Rocks

Sedimentary Rocks

Sedimentary Rocks are made from sediment and in 4 ways: 1) Deposition of the weathered rock 2) Accumulation/consolidation-sediment

3) Deposition of results-biogenic activity 4) Precipitation from solution.

Sedimentary rocks include: chalk, limestone, sandstone, clay, and shale. These types of rocks cover at least 75% of Earth's surface.

Now, with how it forms, Another rock or sediment goes deep beneath Earth's surface. Over time, sediment piles on each other and

sticks together like glue. Through this process, plants and animals can get crowded with the sediment and end up in the rock

( This makes a fossil). Then, over millions and millions of years, it turns into an... SEDIMENTARY ROCK!!

Like we said earlier, Petrologists study rocks! These are our sedimentary rocks :) !

Sedimentary Rocks

Pictures