slide1
Download
Skip this Video
Download Presentation
Headlands

Loading in 2 Seconds...

play fullscreen
1 / 29

Headlands - PowerPoint PPT Presentation


  • 150 Views
  • Uploaded on

Headlands. and bays. http://www.flickr.com/photos/anthonythomas/3085961629/. Waves attack the coastline. Harder rock. Softer rock. Harder rock. This area is now more sheltered, this encourages deposition and beaches are formed. Harder rock. Harder rock.

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 ' Headlands' - geri


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
slide1

Headlands

and bays.

http://www.flickr.com/photos/anthonythomas/3085961629/

slide2

Waves attack the coastline.

Harder rock

Softer rock

Harder rock

slide3

This area is now more sheltered, this encourages deposition and beaches are formed.

Harder rock

Harder rock

The softer rock is eroded by the sea- forming a bay.

Softer rock

The more resistant rock is left sticking out into the sea called a headland.

Harder rock

slide4

Surrounded by deep water and exposed to the full force of the waves- the headlands are eroded.

Harder rock

Harder rock

The shallower waters in the bay continue to encourage deposition.

Softer rock

Harder rock

slide6

Stack formation…

http://www.flickr.com/photos/rosedavies/534844636/

slide7

This is a chalk headland.

Hydraulic action will exploit these weaknesses.

Because chalk is a sedimentary rock, lines of weakness run throughout the headland.

slide8

Between low and high tide, waves will attack the base of the headland.

HT

The process of corrasion will undercut the base of the cliff, forming a wave cut notch.

LT

slide9

The undercutting by corrasion will make the cliff unstable.

HT

This creates small caves which are enlarged over time by erosion.

LT

slide10

Caves develop on either side of the headland.

HT

LT

These caveserode back through the headland and meet, forming an arch.

slide11

Continued erosion at the base of the arch will cause the roof to become unstable.

HT

LT

It may collapse leaving a stack.

slide13

Pop-up headland..

http://www.flickr.com/photos/sacherfire/217113480/

slide14

1

You need your template. This will represent a chalk headland.

slide15

2

Using a blue crayon- shade the outside horizontal strips- these represent the sea.

slide16

3

Using a green crayon- shade the middle horizontal strip- this represents the top of the headland- exposed to weathering.

slide17

4

Just above the horizontal blue lines- shade a grey line- make sure it reaches the top of the wave-cut notch. This represents wave action between high and low tide.

slide18

5

Don’t cut off your stump!

Carefully cut out all the black areas on the template- with the exception of the wave-cut notch.

slide19

6

It should look like this...

slide20

7

Using a ruler, carefully fold the horizontal lines.

slide21

8

Like this...

slide22

9

Glue along the two blue horizontal strips- on the reverse!

slide23

10

Position the green strip over the centre of your book. Gently glue down the blue horizontal strip- the one with the stump.- Practice your positioning first.

slide24

11

Carefully practice folding the model... are the folds the right way?

slide25

12

Finally, glue the final blue strip down. Practice the positioning first...

slide26

13

Gently close your book...

slide27

14

Magic...

slide28

4

5

1

3

2

6

Arty shot...