Presentation on theme: "Chapter 6, Section 3 Standards 3c. Students know how to explain the properties of rocks based on the physical and chemical conditions in which they are."— Presentation transcript:
Chapter 6, Section 3 Standards 3c. Students know how to explain the properties of rocks based on the physical and chemical conditions in which they are formed, including plate tectonic properties. Objective 1 Explain the processes of compaction and cementation. Objective 2 Describe how chemical and organic sedimentary rocks form. Objective 3 Describe how clastic sedimentary rock forms. Objective 4 Identify seven sedimentary rock features. Assessment End of Section Questions, Chapter Test Review Daily Bellwork, Science Starters, Standards Practice
Key Terms Create a flash card for the following key terms (p. 129 in textbook): Compaction Cementation Chemical sedimentary rock Organic sedimentary rock Clastic sedimentary rock If you finish early, study your flash cards!
Sedimentary Rock Loose fragments of rocks, minerals, and organic material are called sediment. When sediment is compacted and compressed over time it becomes SEDIMENTARY ROCK.
3 Types of Sedimentary Rocks Organic Clastic Chemical
Chemical Sedimentary Rock Forms from minerals that were once dissolved in water. When water evaporates, the minerals are left behind. When enough mineral is left behind they form rocks called Evaporites. Gypsum, halite (rock salt) Bonneville Salt Flats near the great Salt Lake in Utah.
Organic Sedimentary Rock Rock that forms from the remains of living things. Coal forms from buried plant material. Limestone forms from dead marine organisms (coral, clams, plankton, etc) Chalk is made up of teeny, tiny shells of marine organisms
Clastic Sedimentary Rock Forms from rock fragments that are carried away from their source by water, wind, or ice and left as deposits. Clastic Sedimentary Rocks are classified by the size and shape of the fragments that are cemented together.
ConglomerateBreccia SandstoneShale Types of Clastic Rock
Conglomerate Rock Rounded fragments that can easily be seen.
Breccia Fragments are angular and have sharp corners. Sediment pieces are easily seen.
Sandstone Sand-sized grains that have been cemented together. Many sandstones are porous and groundwater, crude oil, and natural gas can flow through it.
Shale Clay-sized particles that are cemented and compacted. Pressed into flat layers that easily split apart.
Quick Check!! 1)What is sedimentary rock?________________________________________ ____________________________________________ ____________________________________________ __ 2)Name 3 Types of Sedimentary Rock: ____________________________________________ ____________________________________________ ____________________________________________ 3)Name 2 Types of Clastic Rock: ____________________________________________ ____________________________________________ ____________________________________________
INTERACTIVE! Create a BUBBLE Map with terms about Sedimentary Rocks. Add color!
Clastic Sediments Sediments are transported by water, ice, wind, and gravity. In general, larger sediments do not travel very far from the source; smaller sediments will travel longer distances. Sorting: The tendency for water and air to separate sediments according to size is called sorting. Angularity: In general, the closer to the source the sediment is deposited the more sharp and angular it is. The farther away it is deposited the rounder and smoother it becomes.
Stratification Layering of sedimentary rock Sedimentary Rock Features Cross-beds and Graded Bedding Ripple Marks Mud Cracks Fossils and Concretions Slanting layers are cross-beds. Graded bedding occurs when different sizes and shapes of sediment settle at different layers. Caused by wind or water on sand. Form when muddy deposits dry and shrink. The remains or traces of ancient plants and animals are often buried in sedimentary rock and impressions are left in the rock.
Assessment Frayer Diagram: Include a written description/definition and a picture in each box. Sedimentary Rock Formation of Sedimentary Rock Chemical Sedimentary Rock Organic Sedimentary Rock Clastic Sedimentary Rock
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