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0078_phes09_GRSW_Ch11.QXD 5/9/07 3:36 PM Page 82 Name ___________________________ Chapter 11 Class ___________________ Date _____________ Mountain Building Section 11.3 Mountains and Plates This section explains how mountains are formed at plate boundaries. Reading Strategy Outlining As you read, make an outline of the important ideas in this section. Use the green topic headings as the main topics and the blue headings as subtopics. For more information on this Reading Strategy, see the Reading and Study Skills in the Skills and Reference Handbook at the end of your textbook. I. Mountains and Plates A. Convergent Boundary Mountains 1. Ocean-Ocean Convergence 2. Ocean-Continental Convergence 3. Continent-Continent Convergence B. Divergent Boundary Mountains C. Non-Boundary Mountains D. Continental Accretion 1. Terranes 2. Mountains from Accretion Convergent Boundary Mountains 2. Colliding plates provide the compressional forces that fold, fault, and metamorphose the thick layers of sediment deposited at the edges of landmasses. 3. Circle the letter of each true statement about ocean-ocean convergence. a. Ocean-ocean convergence occurs when an oceanic plate converges with a continental plate. b. The converging plates can lead to the growth of a volcanic island arc on the ocean floor. c. An example of an island arc formed by ocean-ocean convergence is Japan. d. Ocean-ocean convergence mainly produces volcanic mountains. 4. Is the following sentence true or false? The types of mountains formed by ocean-continental convergence are volcanic mountains true and folded mountains. Earth Science Guided Reading and Study Workbook IPLS Pages ■ 82 © Pearson Education, Inc., publishing as Pearson Prentice Hall. All rights reserved. 1. Is the following sentence true or false? Most mountain building true occurs at convergent plate boundaries. 0078_phes09_GRSW_Ch11.QXD 5/9/07 3:36 PM Page 83 Name ___________________________ Chapter 11 Class ___________________ Date _____________ Mountain Building 5. The figure illustrates mountain building along an Andean-type subduction zone. Select the appropriate letter in the figure that identifies each of the following features. C ocean trench A asthenosphere E continental volcanic arc D accretionary wedge B subducting oceanic lithosphere E D Deformed marginal sediments C B B 100 km Melting A 6. Is the following sentence true or false? At a convergent boundary, a collision between two plates carrying continental crust will result in the formation of folded mountains. true 7. Fault-block mountains are formed along ocean ridges at divergent plate boundaries. Non-Boundary Mountains 8. Why are some mountains forming at non-plate boundaries? Volcanic mountains are forming in locations of volcanic hot spots or volcanic activity. Many fault-block mountains occur in areas that are undergoing regional extension or stretching. Continental Accretion terranes 9. When crustal fragments called collide with a continental plate, they become stuck to or embedded into the accretion continent in a process called . Earth Science Guided Reading and Study Workbook IPLS Pages ■ 83 © Pearson Education, Inc., publishing as Pearson Prentice Hall. All rights reserved. Divergent Boundary Mountains 0078_phes09_GRSW_Ch11.QXD 5/9/07 3:36 PM Page 84 Name ___________________________ Chapter 11 Class ___________________ Date _____________ Mountain Building WordWise Solve the clues to determine which vocabulary terms from Chapter 11 are hidden in the puzzle. Then find and circle the terms in the puzzle. The terms may occur vertically, horizontally, diagonally, or backwards. © Pearson Education, Inc., publishing as Pearson Prentice Hall. All rights reserved. Q K D E N I L C I T N A Q H A L C V I C R J P O E M Z E C W I O P D K T I V O P B A C O Z B L X M T N N M A S J R A Y I Z B A O O P R X H L E U D F M M T C P Q S M F Q T A O D R S L L Q U W U C X I O V J W F O E S N I S Y G J N U E I A B H D S M K C G N E R E K E X N C R F R P N D T N Q E N E F Y L C W X O S N I N H E I H Y A I D J L C Q A F Y G T E R R A N E P A T R P E O R Z X G J D E M Clues The general term that refers to all changes in the shape or size of a rock body M K T V N R Z B M H Z L F F A H S G G O B M W X S R K L Hidden Words deformation Force per unit area acting on a solid stress The change in shape or volume of a body of rock as a result of stress strain Commonly formed by the upfolding, or arching, of rock layers anticline A trough associated with anticlines syncline A large, step-like fold in otherwise horizontal sedimentary strata monocline The collection of processes that produce a mountain belt orogenesis terrane Any crustal fragment that has a geologic history distinct from the adjoining accreted crustal blocks Mountains formed as large blocks of crust are uplifted and tilted along normal faults fault-block The process in which fragments become embedded or stuck to a continental plate accretion Earth Science Guided Reading and Study Workbook IPLS Pages ■ 84