Add to Table of Contents Tunka-Shila Questions Pg. 36 Sedimentary RocksPg. 37
Tunka-Shila Tunka-Shila, Grandfather Rock 1.What process in the rock cycle does Paragraph A describe? 2.What type of rock is being formed in Paragraph A? 3.What process in the rock cycle does Paragraph B describe? 4. What type of rock is being formed in Paragraph B? 5.What are your feelings about this story? Did it help you learn about rocks? Did it help you to understand how other cultures view the formation of our planet?
Review: What are the types of rocks? IGNEOUS SEDIMENTARY METAMORPHIC Rocks are divided into 3 groups based on how they were formed
Formed from sediments that are pressed or cemented together. Sedimentary rocks represent 7% of the Earth’s crust, but they cover 70% of the Earth’s surface.
Sediments= Rock fragments, mineral grains, animal & plant remains. Water or wind breaks down rock into sediments.
These sediments are moved by wind, water, ice or gravity. Then they are deposited (dropped)
Compaction=The heavy sediments press down on the layers beneath causing the sediments to fuse together. What turns sediments into solid rock?
Cementation=Dissolved minerals flow between the particles and cement them together.