Wk 4 tv3 2425 KSG

• Aardrijkskunde
• Middelbare school
• havo, vwo
• Leerjaar 3

Check 2.1- first part 2.2

The start of
the geological time scale is ...

1. precambrium - ordovicium - siluur - perm - devoon
2. cambrium - ordovicium - siluur - devoon - perm
3. precambrium - cambrium - siluur - perm - trias
4. precambrium - cambrium - ordovicium - siluur - devoon

What is a fossil?

Igneous rock

Metamorphic rock

sedimentary rock

Layers well visible

Originates from magma

Completely changed rock

The age of rock

1. Relative age: compared to something else, it is older or younger. For example, fossils are used for this.

2. Absolute age: you can say exactly how old something is. Absolute age is demonstrated by using, for example, radioactivity or carbon analysis techniques.

Different types of rock

Igneous rock

• Basalt > heavy, thin, ocean floor

• Granite > light, thick, continent

Organic sedimentary rock = formed from remains of plants or animals

• Limestone > skeletons, seabed

• Lignite > plant remains, peat

Metamorphic rock = formed under high pressure and high temperature from igneous or sedimentary rock

• Marble (from limestone)

Sediment gesteente

Stollings-
gesteente

Metamorfe gesteente

Stollings-

gesteente

Sediment-

gesteente

Metamorf gesteente

de afwisselende laagjes vuursteen en kalksteen tonen:

1. Absolute ouderdom
2. Relatieve ouderdom