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LAND-FORMS DUE DIRECTLY OR INDIRECTLY TO IGNEOUS

ACTION

Plutonic and Volcanic Rocks-Deformation of Surface caused by

Intrusions-Laccoliths of Henry Mountains-Volcanoes, Structure

and Form of Mud-cones-Geysers-Fissure-eruptions - Volcanic
Plateaux-Denudation of Volcanoes, etc., and resulting features.

INFLUENCE OF ROCK CHARACTER IN THE DETERMINA-

TION OF LAND-FORMS

Joints in Rocks and the part they play in determining Surface-

features Texture and Mineralogical composition of Rocks in rela-
tion to Weathering-Forms assumed by various Rocks.

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5. Section across Faulted or Dislocated Strata

6. Section across Unconformable Strata

8. Section and Bird's-eye View of Colorado Plateau (Powell)
Diagrammatic Section across Colorado Plateau
Diagrammatic Section showing Stages of Erosion by a River cutting
through Horizontal Strata (after Captain Dutton).
Section across Suderoe (Faroe Islands) on a true scale
Map of an Island composed of Dome-shaped Strata.
13. Section through the Island shown in Fig. 12

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15. Enlarged section of a portion of the Island shown in Fig. 12
16. Diagram Map of Plateau of Erosion

Section across reduced Plateau of Erosion
Longitudinal Section of River Course

19. Section of Escarpments and Outliers
20. Section across the Wealdean Area (Ramsay)
Section across Permian Volcanic Basin, Ayrshire
Synclinal Hills and Anticlinal Valleys
23. Escarpment Hills and Synclinal Hill

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Section across West Lomond Hill and the Ochils 25. Synclinal Valley, West of Green River (Powell) 26. Anticlinal Ridge, Green River Plains (Powell). Isoclinal Folds

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28. Isoclinal Folds

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Overfold passing into Reversed Fault, or Overthrust

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