How Does Magma Affect Land Features?
10
How Does Magma Affect Land Features? D35
description
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
Transcript of How Does Magma Affect Land Features?
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