1. DO NOW
Turn in Review #11.
Pick up notes and Review #12.

2. REVIEW What type of: Stress? Force? Tension Fault? Landform?
Constructive
Normal
Rift Valleys and Mid Ocean Ridges

3. Converging Plates and Metamorphic Rock
SES2. Students will understand how plate tectonics creates certain geologic features, materials, and hazards.
Distinguish among types of plate tectonic settings produced by plates diverging, converging, and sliding past each other.
d. Associate specific plate tectonic settings with the production of particular groups of igneous and metamorphic rocks and mineral resources.

4. PLATES, FAULTS, STRESSES AND LANDFORMS
Boundaries
Force
Stresses
Faults
Landforms
Convergent
Destructive
Compression
Reverse
Ocean Trenches and Mountains
Transform
Neutral
Shear
Slip-strike
Offset Geology
Divergent
Constructive
Tension
Normal
Rift Valleys and Mid-Ocean Ridges

5. CONVERGENT PLATES - Compression Stress - Reverse Fault - Landforms:
Mountains
Volcanoes
Ocean Trenches
- Destructive Force
Rocks that are exposed to heat and pressure but do not melt are metamorphic.

6. METAMORPHIC ROCKS
Recrystallization of unmelted material under high temperature and pressure.
Changes in texture.
Changes in mineralogy.
Classes:
Foliated
Non-Foliated

7. ROLE OF HEAT AND PRESSURE
With increasing temperature and pressure and metamorphic grade, the more changed the rock will be from its original form.
Greater heat and pressure results in larger, more observable crystalline minerals.

8. REGIONAL METAMORPHISM
Convergent Boundaries
Cover large areas.
High temperature and pressure.
Produces foliated textures.
Heat and pressure increase with depth.

9. CONTACT METAMORPHISM Rocks exposed to heat near magma.
Can be Convergent or Divergent boundaries.
Usually near surface.

10. COMPARING TYPES
Some Metamorphic Rocks are GEOTHERMOMETERS because their presence defines a minimum temperature a rock must have achieved in order to complete the metamorphic process.
Examples: staurolite and hornblende.

11. CONVERGENT PLATES AND MINERALS
Heat near subduction zones (convergent boundaries) can produce:
Iron, ores
Metals:
Copper
Silver
Gold
Lead, zinc, tin
Not just where plates meet now, but also where they met in the past!

12. METAMORPHIC ROCK PRECURSORS
Shale (sedimentary) turns to slate.
Granite or Gabbro (both igneous) turns to gneiss.
Mudstone (sedimentary) turns to hornfels.
Sandstone (sedimentary) turns to quartzite.
Limestone (sedimentary) turns to marble.
Basalt (igneous) turns to schist.

13. REVIEW What kinds of rocks can become metamorphic rock? Igneous Only
Sedimentary Only
Other Metamorphic Only
All the Above

14. LAB: EXPLORING METAMORPHIC ROCKS
Compare metamorphic rocks to their parent rocks
Illustrate, describe
Look up additional information:
Rock Books

15. TO DO
Metamorphic Rock lab
Review #12 due tomorrow.