NOTE: For some movies in the Interactive Geologic Blocks module accessed from succeeding pages, you will need to use QuickTime, NOT Windows Media Player or any other media player.
Follow the link below, which will take you to a module to help you visualize how layers, folds, faults, and intrusions are expressed on the surface and in the subsurface. These features are present in the areas (Superior and Jerome) you'll study today.
In the module, you will be instructed to sketch geologic features (layers and faults) on the top or sides of blocks on Worksheet 11B in your lab manual. Do not try to sketch any block on the worksheet until the module specifically instructs you to proceed. After you have worked through the module, complete Assessment 11B on Canvas.
Interactive Geologic Blocks Module
Next, follow the link below to examine a movie about strike and dip. This module's geologic maps use strike and dip symbols to show the orientation of a rock layer. In this movie, a rock layer is represented by a wooden plank in a barrel (or hot tub) of water, with a strike and dip symbol on the plank. The longer line represents the direction of strike and is always parallel to the water line, because the strike represents a horizontal line. The smaller line indicates the direction of dip and is perpendicular to the strike line; it shows the direction in which the layer is inclined. (This file is large and takes a little time to load.)
This week's geologic maps have geologic layers intersecting the Earth's surface. Follow the link below to explore a movie showing how rock layers intersect the surface, depending on the direction in which the layers are titled.