Sedimentary Rocks (Part 1)

Unit 2 - Week 7 - Part 1

What are sedimentary rocks made from?

Sediment

What is a sediment?

Small pieces of rock / material from life

What are the 4 types of Sedimentary rocks?

1. Clastic

2. Chemical

3. Biochemical

4. Organic

Clastic = ?

Rock pieces (from other rocks)

Chemical = ?

Minerals (out of water)

Biochemical = ?

Living things

Organic = ?

Dead material

Siliceous = ?

Quartz

Argillaceous = ?

Clay

Carbonate = ?

Calcite / dolomite

What is the mineral formation?

Magma, Water, Solid, Living things

What is precipitation?

Minerals come out of water

What is an evaporate?

Minerals left after water evaporates

Biochemical rocks is often made from?

Shells

What are organic coal?

Plants

What are organic oil shale?

Organic Material + Shale

Clastic rocks are made from?

Older rock pieces

What are the 5 steps to Clastic Rocks?

Weathering, Eruption, Transportation, Deposition, Lilhification

Weathering = ?

Rocks breaking

Erosion = ?

Sediments start moving

Transportation = ?

Sediments move

Deposition = ?

Sediment drops

Lithification = ?

Becomes rock again

Physical Weathering = ? vs. Chemical Weathering = ?

Physical: Breaks rock

Chemical: Changes minerals

Thermal Expansion = ?

Heat + Expands

Root wedging = ?

Roots get into cracks (breaks)

Frost wedging = ?

Water gets into cracks (freezes, then cracks)

Abrasion = ?

Rocks scrape/rubs against rocks

Jointing = ?

Crack in the rock

What are the types of Jointing?

Columnar & Exfoliation

Hydrolysis = ?

Water

Oxidation = ?

Rust

Carbonation = ?

Acid

Dissolution = ?

Dissolve

Stalactite is for?

Ceiling

Stalagmite is for?

Ground

Mica and Feldspar are:

CLAY minerals

Quartz is more…

Robust