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How Does Magma Affect Land Features?. D35. Underground magma can cool and harden in many shapes and forms before it reaches the surface. Dike: hardens in vertical cracks Sill: hardens between horizontal layers of rock (flat) - PowerPoint PPT Presentation
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How Does Magma Affect Land Features?
D35
• Underground magma can cool and harden in many shapes and forms before it reaches the surface
• Dike: hardens in vertical cracks
• Sill: hardens between horizontal layers of rock (flat)
• Laccolith: Magma pushes into a sill to form a pocket, pushes rock layers up into dome mountains.
• Dome mountains: broad, circular mountains formed from uplifted rock layers (Black Hills of South Dakota)
• Batholiths: largest and deepest underground formation- if above sea level it looks like large steep hills
Dome Mountain
What feature is this?
• Dome mountain
• Batholith
• Dike formation
• A sill
• Laccolith
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