ch17_2302 - Landforms and Rock Structure Chapter 17...

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IG4e_17_opener IG4e_17_opener Landforms and Rock Structure Chapter 17
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Landforms and Rock Structure Rock Structure as a Landform Control Landforms of Horizontal Strata and Coastal Plains Landforms of Warped Rock Layers Landforms Developed on Other Land-Mass Types
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rocks differ in their r esistance to denudation more resistant rock tends to form uplands and ridges while weaker rock forms lowlands and valleys rock layers can be tilted, folded and fractured by tectonic forces Landforms and Rock Structure Figure 17.1, p. 577
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Landforms and Rock Structure principal rock structures and associated landforms Figure 17.2, p. 577
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the tilt and orientation of rock layers and fractures are described by their strike and dip strike - orientation of the rock plane with respect to compass direction dip - angle between rock plane and horizontal plane Landforms and Rock Structure Figure 17.3, p. 578
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plateaus , mesas , and buttes are landforms of flat-lying erosion resistant strata in arid regions slopes in these regions form stair-step sequences of vertical risers of resistant rock with sloping treads of weaker rock Landforms of Horizontal Strata and Coastal Plains Figure 17.1, p. 577
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IG4e_17_05 IG4e_17_05 Bright Angel Canyon – Grand Canyon NP
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drainage networks have characteristic patterns Dendritic : uniform surface Trellis : inclined layers of sedimentary rock Landforms of Horizontal Strata and Coastal Plains Radial : around a hill
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coastal plains are found along passive continental margins consequent streams flow to the sea across the belts, fed by subsequent streams that drain the cuestas and lowlands Landforms of Horizontal Strata and Coastal Plains Figure 17.7, p. 582
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Cuestas In structural geology , cuesta
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ch17_2302 - Landforms and Rock Structure Chapter 17...

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