Rocks and Minerals Identification

1
Rocks and Minerals Identification
2
I know a rock is sedimentary if

• I see layers of sediment cemented together
• OR
• I see ripple marks
• OR
• It looks like its made from salt
• OR
• I see fossils
• OR
• I see cobbles, pebbles and sand grains cemented
  together

3
I know a rock is igneous if

• I see randomly located interlocking crystals
• OR
• I see bubbles where gases escaped as lava
  cooled
• OR
• The texture of the rock is glassy because of
  rapid cooling
• OR
• I see very coarse grains (looks like a granite
  kitchen counter top)
• OR
• Its shiny

4
I know a rock is metamorphic if

• I see bands of light and dark minerals
• OR
• I see distorted/folded, foliated structure
• OR
• I see foliated layers of flaky minerals like
  mica
• OR
• I see a very hard, dense, usually solid colored
  boulder

5
Sedimentary, Igneous or Metamorphic???
SEDIMENTARY (BRECCIA)

• How do you know?!?!
• There are sediments cemented together.

6
Sedimentary, Igneous or Metamorphic???
METAMORPHIC (SCHIST)

• How do you know?!?!
• It has shiny minerals popping out.

7
Sedimentary, Igneous or Metamorphic???
IGNEOUS (GRANITE)

• How do you know?!?!
• It has coarse grains of different minerals.

8
Sedimentary, Igneous or Metamorphic???
IGNEOUS (OBSIDIAN OR BASALTIC GLASS)

• How do you know?!?!
• It has a glassy texture.

9
Sedimentary, Igneous or Metamorphic???
SEDIMENTARY (LIMESTONE -COQUINA)

• How do you know?!?!
• There are sea shells cemented together.

10
Sedimentary, Igneous or Metamorphic???
METAMORPHIC (MARBLE)

• How do you know?!?!
• It is massive and it looks crystalline.

11
Sedimentary, Igneous or Metamorphic???
SEDIMENTARY (SANDSTONE)
How do you know?!?! It has layers. It has a
gritty feel.
12
Sedimentary, Igneous or Metamorphic???
IGNEOUS (PUMICE)

• How do you know?!?!
• It has gas pockets.

13
Sedimentary, Igneous or Metamorphic???
SEDIMENTARY (ROCK SALT)

• How do you know?!?!
• It looks like salt. Crystals were formed from
  evaporites and precipitates.

14
Sedimentary, Igneous or Metamorphic???
METAMORPHIC (Slate)

• How do you know?!?!
• It is very dense. It is foliated.

15
Sedimentary, Igneous or Metamorphic???
SEDIMENTARY (BITUMINOUS COAL)

• How do you know?!?!
• It is lighter, less dense. You can see layers
  from compaction.

16
Sedimentary, Igneous or Metamorphic???
IGNEOUS (DIORITE)

• How do you know?!?!
• It has coarse grains.

17
Sedimentary, Igneous or Metamorphic???
IGNEOUS (SCORIA)

• How do you know?!?!
• It has gas pockets.

18
Sedimentary, Igneous or Metamorphic???
SEDIMENTARY (SANDSTONE)

• How do you know?!?!
• It has fossils.

19
Sedimentary, Igneous or Metamorphic???
METAMORPHIC (GNEISS)

• How do you know?!?!
• It has banding.