Transcript SEDIMENTARY ROCKS

Quiz



Get out you ESRT and a piece of paper
The following questions are from your ESRT.
You’ll have a minute per question…
Question 1

What is foliation?
Question 2

What are the two types on Metamorphism?
Question 3

How can you test if a rock is Marble or
Quartzite?
Question 4

I am a foliated metamorphic rock with a coarse
texture made from high grade metamorphism.
What am I?
Answers

What is foliation?


What are the two types on Metamorphism?


Contact and Regional
How can you test if a rock is Marble or
Quartzite?


Foliation is the alignment of minerals
Marble bubbles with acid and Quartzite doesn’t.
I am a foliated metamorphic rock

Gneiss
SEDIMENTARY
ROCKS
Sedimentary rocks

How are sedimentary rocks formed?

What do sedimentary rocks look like?

What do the characteristics tell us about the rock?

What are sedimentary rocks used for?

How do you use page 7 of the ESRT for sedimentary
rocks?
How are sedimentary rocks
formed?
Sedimentary rocks are formed through:
1. Erosion
2. Deposition
3. Compaction
4. Cementation
…At the earth’s surface usually from other
rocks.

How are sedimentary rocks
formed?

Step one is:
Erosion of elevated
land such as
mountains
How are sedimentary rocks
formed?

Step two is:
Deposition of the
eroded material
How are sedimentary rocks
formed?

Step three is:
Compaction of buried
sediment over time
How are sedimentary rocks
formed?

Step four is:
Cementation of the
particles into a solid
rock
Many times sand is the
glue!
What do sedimentary rocks
look like?

Three types of sedimentary rocks
1.Clastic - sediments cemented together
2.Crystalline – Nonclastic (chemical)
3.Bioclastic - organic material
What do sedimentary rocks
look like?

1.
2.
3.
4.
Clastic rocks are made
of particles cemented
together such as:
Clay - shale
Silt - siltstone
Sand - sandstone
Pebbles - conglomerate
What do sedimentary rocks
look like?
Clay/silt
sand
sandstone
shale
What do sedimentary rocks
look like?

1.
2.
3.
Crystalline rocks are
pure cement such as:
Rock salt
Rock gypsum
Limestone (has fossils)
Crystalline rocks formation

These rocks from evaporation of sea water and
chemical precipitation.
What do sedimentary rocks
look like?

1.
2.
Biological (bioclastic)
rocks are formed
through organic remains
such as:
Coal
Limestone (has fossils)
What do characteristics tell
us about the rock?

Grain size is evidence of environment
where rock formed

Fossils give clues to past life and climate
What do characteristics tell
us about the rock?
What do characteristics tell
us about the rock?
What are sedimentary rocks
used for?
How to use ESRT page 7 sedimentary rocks?
Steps to ID a Sedimentary Rock

Texture





Clasitc, Crystalline or Bioclastic
Grain size
Composition
What it looks like
Fossils? Other features like ripple marks?