sedimentary and metamorphic rocks
Download
Skip this Video
Download Presentation
Sedimentary and Metamorphic Rocks

Loading in 2 Seconds...

play fullscreen
1 / 10

Sedimentary and Metamorphic Rocks - PowerPoint PPT Presentation


  • 62 Views
  • Uploaded on

Sedimentary and Metamorphic Rocks. Chapter 3.3nd 3.4 The Earth’s Surface. I. Sedimentary Rock- This type of rock forms from sediments. Sediments - are materials that settle out of water and air. They are usually created by weathering and erosion from wind or moving water. .

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Sedimentary and Metamorphic Rocks' - wilton


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
sedimentary and metamorphic rocks

Sedimentary and Metamorphic Rocks

Chapter 3.3nd 3.4

The Earth’s Surface

slide2

I. Sedimentary Rock- This type of rock forms from sediments.

    • Sediments- are materials that settle out of water and air. They are usually created by weathering and erosion from wind or moving water.
slide3

There are four types of sediments that can be found on earth. These sediments are arranged by their size.

1.Gravel 2.Sand 3.Silt 4.Clay

Largest Smallest

slide4

There are three ways that sedimentary rocks can form.

    • 1. Pressure- sediments can settle out of water or air, which puts weight on top of older layers. As the weight increases, the bottom layers get pressed into hard compact rock.
slide5

2. Cementation- This occurs when minerals crystallize around sediments, cementing them together. These types of rocks can form as water evaporates, or over long periods of time as minerals collect between sediments.

slide6

- Some sedimentary rocks form from the remains of plants and animals.

Example:

Coal is formed as the remains of prehistoric plants compressed under the weight of the ground.

Limestone forms as coral, shells, plankton and other remains from sea life are cemented or pressed together.

slide7

Metamorphic Rocks- When rocks are put under heat and pressure over time, they undergo metamorphism. Metamorphism means to change into something new.

slide8

Examples:

Granite Gneiss

Limestone Marble

slide9

A. Metamorphic rocks can show different characteristics.

    • Foliated rock-Large amounts of heat and pressure cause the minerals in the rock to line up in a process called recrystallization. These minerals form bands, which give the rocks a striped appearance. (example: Gneiss)
slide10

2. Nonfoliated Rock- These rocks tend to form when the parent rock is made mostly of one mineral and usually in small areas with lots of heat. ( example: Quartzite)

ad