First Go over Chapter 5 interactive notes & then: §6-1 “ Sedimentary Rock”

Objectives: • Name the 3 main types of sedimentary rock & give an example of each.

• Describe several identifiable sedimentary rock features.

Formation of Sedimentary Rocks • Compaction of sediments – Weight of overlying sediments “squishes” the fragments together.

• Cementation of sediments – By quartz or calcite

3 Types of Sedimentary Rocks • • •

#1 CLASTIC #2 CHEMICAL #3 ORGANIC

CLASTIC Sedimentary Rocks Classified by the size of the sediments within the rock • Rounded pebbles –  – Conglomerate • Angular gravel – – Breccia  • Visible pieces of sand –  – Sandstone • Clay/mud particles – – Shale 

5/6 & 7/8 start here CHEMICAL Sedimentary Rocks Formed from minerals that were dissolved in water  Precipitation  Calcite, Chemical Limestone  Evaporation  Gypsum, halite

Organic Sedimentary Rocks Coral • Formed by once-living organisms • Examples: – Coquina • Large sea shells – Chalk • Microscopic Sea shells – Coal • dead plants in swamps – Organic limestone • Fossils • Coral

3 rd period start here on Monday Sedimentary Rock Structures • Stratification • Ripple Marks • Mud Cracks • Fossils • Concretions

Stratification

Ripple Marks

Mud Cracks

Fossils

Concretions

Assignments • • • • Work in small groups to separate your “Box of Rocks” into 3 groups: 1- Clastic = Pieces 2- Chemical = minerals from water 3- Organic = fossils, coral, seashells, coal Can you name each rock?

Wash your hands/table & leave box of rocks on your table.

Begin working on Chapter 6 interactive note sheets.