1. Warm-up
Page: 143, 1. Igneous rock masses that form underground are called _______________. intrusions Page: 144, 2. A ____________ is a vent through which magma, gases, or volcanic ash is expelled. volcano Page: 144, 3. The shiprock formation on this page is located in what state? New Mexico

2. Warm-up 4/11
Page: 145, 1. Loose fragments of rock, minerals, and organic material that result of natural processes are called ________. sediment Page: 145, 2. Sediment is generally transported by _____, _____, or _______ to new location. wind, water, ice Page: 145, 3. Eventually, the loose sediment is ____. deposited

3. Objectives: S.W.B.A.T. Define sedimentary rock
Name 2 main processes that form sedimentary rocks
Name some examples of sedimentary rocks
Name a characteristic of sedimentary rocks
Discuss how are rocks are used in their lives

4. Activities:
Warm-up
Demonstration – student-teacher sedimentary rock formations
Notes/discussions
Video – Out of the Rock

5. SEDIMENTARY ROCK:
SEDIMENTARY ROCKS Sedimentary rocks cover 75% of the surface of Earth.

6. SEDIMENTARY ROCK: They unlock clues to the past!
If sedimentary rocks are common in a region it was probably under water at one time.

7. SEDIMENTARY ROCK:
FORMATION OF SEDIMENTARY ROCKS Step 1: Sediments are deposited by water, wind, ice, etc, and are buried.

8. SEDIMENTARY ROCK:
Step 2: Compaction and/or Cementation Compaction is the decrease in volume brought about by pressure.

9. SEDIMENTARY ROCK: COMPACTION SAND Siltstone SILT Shale CLAY Sandstone
Conglomerate
GRAVEL – PEBBLES

10. SEDIMENTARY ROCK:
Cementation is the process by which sediments are joined (glued) together to form rock.

11. SEDIMENTARY ROCK: Characteristics of Sedimentary rocks Visible Layers
May contain fossils
May contain ripple marks
May contain mud cracks

12. TYPES OF SEDIMENT AND SIZES
SEDIMENTARY ROCK:
TYPES OF SEDIMENT AND SIZES
Large
Small
Gravel & Pebbles > 2 mm
Coarse Grain
Fine Grain
Sand > mm
Silt > .004 mm – .06 mm
Clay < .004 mm

13. Sedimentary rocks