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Understanding Topographic Maps and Geologic Structures

Explore topographic maps displaying elevation, contour lines, and landforms. Learn about geologic maps showcasing rock types, faults, and folds. Engage in interactive learning activities.

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Understanding Topographic Maps and Geologic Structures

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  1. Chapter 3, Section 3

  2. Key Terms Create a flash card for the following key terms (p. 63 in textbook): • Topography • Elevation • Contour line • Relief If you finish early, study your flash cards!

  3. Topographic Maps • Topographic maps show the surface features of a location. • They include rivers, hills, roads, and more. • A topographic map also shows elevation = height above sea level.

  4. Animated Topographic Maps

  5. The lines show the contours and elevation of the island. Topographic Maps

  6. Advantages of Topographic Maps

  7. Elevation on Topographic Maps • Contour Lines are used to show elevation. • Contour Lines are the wavy lines and each line represents a new elevation (height from sea level). • The difference in elevation between one contour line and the next is called the contour interval. • Relief is the difference in elevation between the highest and lowest points of the area being mapped.

  8. Contour Lines

  9. Contour Lines

  10. Quick Check!! • A __________ _________ is the difference in elevation between one contour line and the next. • Name an advantage of a topographic map. _______________________________________________________________________________________________________________

  11. Landforms on Topographic Maps • Contour lines spaced widely apart indicate a gradual change in elevation, whereas lines close together indicate and rapid change in elevation or a steep slope. • A ‘V’ shape indicates a valley, the point is the highest end.

  12. Practice • What kind of landform is represented by this contour map: • Lake • Canyon • Hill • Valley • What is the lowest elevation on the map? ________ • What is the elevation of point A?_________ a

  13. Practice • What kind of landform is represented by this contour map: • Lake • Canyon • Hill • Valley • What is the lowest elevation on the map? ________ • What is the elevation of point A?_________ a

  14. Topographic Map Symbols • Buildings, boundaries, roads = black. • Major highways = red. • Water = blue. • Forests = green

  15. INTERACTIVE! • Frayer Diagram: TOPOGRAPHIC MAPS • Complete and then tape/glue onto interactive side of your notebook. Definition Illustration Topographic Maps Advantages Contour Lines

  16. Geologic Maps • Geologic maps show types of rocks and the locations of faults, folds, and other structures. • Geologic Units are a volume (section) of rock from the same age range and rock type and are shown in the same color. • Letters are also used to label the types and ages of the rock on the map. • Used by engineers, geologists, developers

  17. Geologic Maps • Contact Lines—places at which 2 geologic units meet. • The place at which 2 geological units meet is called a “Contact”. • 2 main types of Contacts are: faults and depositional contacts (one layer of rock formed on top of another)

  18. Assessment PlaydohMountains

  19. Daily Quiz

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