Structural Geology
6 questions tagged Structural Geology — spanning every one of the seven Ws.
Why are some rocks folded into waves and curves?
Rocks fold when layers are compressed while still behaving plastically deep underground. Instead of breaking, the rock bends into anticlines and synclines.
What is a joint in rock geology?
A joint is a natural crack in rock that has not moved significantly along the fracture. Joints help control how rocks break, weather, and form cliffs or blocks.
What is an anticline?
An anticline is an upward-arching fold in layered rock. In a typical anticline, the oldest rocks are found near the center of the fold.
What is a syncline?
A syncline is a downward-arching fold in layered rock. In a typical syncline, the youngest rocks are found near the center.
Why do certain rocks split into flat slabs?
Some rocks split along bedding planes or cleavage planes created by pressure, mineral alignment, or layering. Sedimentary rocks and metamorphic rocks can both do this.
What is a salt dome?
A salt dome is a tall underground mass of salt that rises through overlying rock because salt is less dense and can flow under pressure.