Sedimentary rocks 1

Where do sedimentary rocks come from?Can you think of an example of sedimentary rock?. What processes are involved in the formation of sedimentary rocks?. What is a sedimentary rock?• Se

Sedimentary Rocks

Where do sedimentary rocks come from?

Can you think of an example of sedimentary rock?

What processes are involved in the formation of sedimentary rocks?

Sandstone, shale, limestone, conglomerate…

Compaction and Cementation

Sediments

What is a sedimentary rock?

• Sedimentary rocks are formed by the

accumulation of inorganic and organic

sediments which undergo compaction and cementation to form rock

Coal is a sedimentary rock

Compaction

Cementation

Heat and Pressure

Sedimentary Rocks are classified based

on their components.

Clastic Organic Chemical

1.) Conglomerate

2.) Sandstone

3.) Shale

1.) Coal

2.) Fossiliferous Limestone

1.) Limestone

2.) Salt

Environments affect the type of

sediment.

Environments change throughout

geologic time.

Where do you think these rocks are from? GRAND CANYON!!!

• The law of Superposition tells us that the

section and the youngest rocks are at the top

of the rock section

Rock Section activity

• Create your own sedimentary rock section by filling in a plastic container with at least 3

sediments from the different environments

• Make sure not to overfill the plastic

containers

Wrap up questions

write on the back of your handout

• Describe the layers in your cross section

• How many layers are there?

• What were the environments of deposition?

• Which order do the layers go in?

• Which layer is the oldest?

• Which layer is the youngest?

Different environments produce

different sedimentary rocks.

Different environments produce

different sedimentary rocks.

Different environments produce

different sedimentary rocks.

Different environments produce

different sedimentary rocks.

Climates have been changing for

billions of years.

• http://www.ucmp.berkeley.edu/geology/anim1.html

Climate change occurs naturally, but

we aren’t sure why.

Wisconsin Stage (26,000 to 13,300 years ago)

Recently, scientists have seen a global warming

trend coinciding with Industrialization

Climates have changed dramatically in

Pennsylvania.