{ Sedimentary Rocks. Aim: How do we classify and evaluate sedimentary? How do we classify and...

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Sedimentary Rocks

Aim: How do we classify and evaluate

sedimentary?  Learning Target:

I CAN explain how rocks are formed and on what basis they are classified

Aim & Learning Target

Open your Reference Tables to the Sedimentary Rock Scheme

Do Now

Do Now Check:

Read the following statement: You find a rock on your way home, you think it might

be a sedimentary rock because you see fossils embedded inside it.

Thumbs up you agree Thumbs down you disagree

ALL ROCKS are composed of MINERALS!

RECAP:

WEATHERING (can be caused by rain wind, water) breaks down rocks into sediments

Examples of sediments: Sand Pebbles Silt clay

FORMATION OF SEDIMENTARY ROCKS

SETTLE in a process called deposition.

MOVE in a process called erosion

What happens to sediments?

PRESSED together under many layers of sediment called compaction

Dissolved minerals CRYSTALLIZE AND STICK TOGETHER in a process called cementation.

What happens to sediments?

sedimentary rocks

The result =

May contain chunks of other rocks

May contain shells

May contain fossils

Sometimes layered, but the layer are

similar in color

Characteristics of Sedimentary Rocks

Page 7. What does it tell us about sedimentary rocks?

What pg of the ref table can you find the Scheme for Sedimentary Rock identification?

Texture Grain size Composition Rock names Map symbol

What does it tell us about