Grand Canyon Virtual Tour - Diann Espinoza | Biblioteka

LAYERS AND SUPERPOSITION

Open this website in another tab and follow along in the virtual field trip, answering the questions along the way.

https://aelp.smartsparrow.com/v/open/gihea8c4

After you click start, click the green CONTINUE button. Watch the video about the layers and answer the question below.

1

Choose all the things that Dr. Karlstrom discusses about the layers.

each layer was mixed up with the others

geologists use clues to unravel the history of the rock layers

how there are different colored layers

how there are slopes and cliffs

Click CONTINUE again and read the instructions to look at the different layers. Answer the questions as you explore.

1

Match the name of the rock layer with the age. (my= million years) If the videos are too small, click on the YouTube link in the frame and it will open in another window. Click and drag the picture to see the whole view.

Stavka koja se može prevući		Odgovarajuća stavka
Muav Limestone		545my
Supai Group		530my
Toroeap Formation		515my
Bright Angel Shale		335 my
Tapeats Sandstone		260my
Redwall limestone		255my
Cononino Sandstone		285my

1

What kind of rock are the canyon walls made of?

extrusive igneous

intrusive igneous

metamorphic

sedimentary

Click on the green CONTINUE button.

1

Take a guess at the type of animal that lived during the times that the layers were being layed down. One is a land animal and one is a sea dweller. Once you make your choice you will see the correct answer, mark it here:

Edaphosaurus

Trilobite

1

Take a guess at the type of animal that lived during the times that the layers were being layed down. One is a land animal and one is a sea dweller. Once you make your choice you will see the correct answer, mark it here:

Edaphosaurus

Devonian fish

Choose the best ending to the following sentences.

1

When you look at the layers,

the oldest are at the top and youngest at the bottom.

the youngest are at the top and the oldest at the bottom.

1

The layers formed when

sediments deposted over time and cemented and compacted together.

lava cooled into extrusive igneous rock.

Zoom out to see all the names of the layers to answer the questions on the website.

1

Where did all of the sediments come from that formed the walls of the canyons?

A lake

Ancient seas

A river

THE MYSTERY OF BLACKTAIL CANYON

Now click on this link and go to the next lesson:

https://aelp.smartsparrow.com/v/open/y4m9alvn

Follow the instructions and answer the questions here as you go along.

Click the blue NEXT button at the bottom right to move ahead. Read the directions in the box on the upper left.

1

Click on the blue CANYON WALLS button, then click and drag the picture around to look around you and write down three things you notice about the walls of Blacktail Canyon.

1

Click NEXT and then click on the CANYON FLOOR button. Click and drag the picture around and write three things you notice about the floor of Blacktail Canyon.

1

Click the NEXT button. Read what a rock unit is. Choose a simpler definition from the options below.

all the little rocks and big rocks in a place

a section of rock that is of the same age and appearance

Click the NEXT button. Take some time to expand the images of the rocks and notice the differences between their texture, the direction they are lying and the color, then click the NEXT button again.

Now click the LOOK HERE button.

1

How many different rock units do you see? Zoom in and look closely at the pictures when you expand them.

Click the NEXT button and try out the quiz question. When you get the right answer, enter it in question 12, see if you were right or not the first time.

1

Listen to Dr. Karlstrom explain the age and differences in teh upper and lower rock units. Select the reason why the upper unit is important.

Records the oldest rocks in the southwest

Formed when the canyon was very young

Represents the time of the explosion of life on Earth

1

Why is the lower rock unit important?

Details the chapter of the Jurassic Period

Contains the oldest rocks in the southwest

Records the early forms of life in the Cambrian Period

Click NEXT and read the information about the rock types.

1

Choose the correct answer.

the upper layer is igneous and the lower is metamorphic

the upper layer is metamorphic rock and the lower is igneous

the upper layer is sedimetary and the lower is metamorphic

1

Match the sentences after you listen to Dr. Semken discuss some important features of the two rock units.

Stavka koja se može prevući		Odgovarajuća stavka
The sandstone was formed by		crystals of minerals that are lined up in parallel from being under heat and pressure.
The metamorphic rock has		individual grains being deposited and buried which cement and compact to form the solid rock.

1

Which of the rock units is older?

Tapeats Sandstone sedimentary rock

Elves Chasm Gneiss metamorphic rock

1

Choose the yellow line as the place where the two rock units meet each other and submit. In the next section you will see yellow lines drawn on the image. Why do you think rock unit 1 is running horizonally but not unit 2?

Click forward to listen to the scientist describe the two types of rocks in the units.

1

Which type of rock often has fossiles embeded in it?

metamorphic

sedimentary

igneous

1

Which type of rock has interlocking crystals that are all lined up in bands as a result of the heat and pressure exerted on an older rock?

metamorphic

sedimentary

igneous