1. Wednesday February 15, 2012 (Sedimentary Rocks; WS – Sedimentary Rocks [Part 1])

2. The Launch Pad Wednesday, 2/15/12 No Launch Pad Today

3. Assignment Currently Open Summative or Formative Date Issued Date Due Date Into Grade Speed Last Day Quiz 18S52/3 2/17 WS – Igneous Rocks (Part 1) F2/92/13 Quiz 19S62/10 2/24

4. Announcements I will be available after school today until 4:45.

5. Latest News http://www.space.com/14309-china- space-future-missions-moon.html China's New Space Exploration Vision Shoots for the Moon Click below for article:

6. Sedimentary rocks form from sediment, which is the product of weathering. Sedimentary rocks make up about 75% of all rock outcrops on Earth’s continents. These rocks are used to reconstruct much of Earth’s history, as they provide clues to past environments and sediment transport. Sedimentary rocks often contain fossils.

7. Sedimentary rocks are of tremendous economic importance because they can contain fossil fuels: coal oil natural gas They are also sources of iron and aluminum.

8. There are two classifications of sedimentary rocks based upon the source of the material in the rocks, detrital and chemical. Materials accumulating as sediment have two principle sources: Sediment may originate as solid particles from weathered rocks, such as igneous rocks. These particles are called detritus, and the sedimentary rocks they form are called detrital sedimentary rocks. In detrital rocks, the material is in solid particles, so geologists use particle size to distinguish amoung detrital rocks.

10. shale (very fine particles) siltstone (fine particles) sandstone (medium particles) breccia (course, angular particles) conglomerate (course, rounded particles)

11. There are two classifications of sedimentary rocks based upon the source of the material in the rocks. Materials accumulating as sediment have two principle sources: The second major source of sediment is solid material produced largely by chemical weathering. When these dissolved substances are precipitated back as solids, they are called chemical sediments, and they form chemical sedimentary rocks. Chemical sedimentary rocks are derived from material that was once in solution and precipitates to form sediment. They are either directly precipitated as the result of physical processes, or deposited through life processes (biochemical origin.)

13. fossiliferous limestone coquina (shell fragments) Chalk Agate flint jasper

14. evaporate deposits

15. Worksheet Sedimentary Rocks (Part 1)