Synclines
SYNCLINE
Such a fold is called a syncline.
== == An upward fold in a rock formation is called an anticline.
A fold
Layers of rocks can curve downward due to tectonic forces. When two tectonic plates collide, the pressure and compression can cause the rocks to fold and bend. This folding can create downward curves known as synclines, where the youngest rocks are exposed in the center and older rocks are found on the sides.
The syncline fold has younger layers closer to the center of the structure. Synclines will eventually form valleys or peaks, depending on the softness of the core of the syncline.
Such a fold is called a syncline.
Such a fold is called a syncline.
If rocks are folded, the folding is younger that the youngest rock affected. If they are folded into a syncline (a U-shaped fold) the youngest rocks are in the core of he fold. The opposite is true for an anticline (a big dome-shaped fold).
Fold
Synclines
== == An upward fold in a rock formation is called an anticline.
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When you fold a paper in half, the line that runs down the center is called the crease.
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A fold
anticlines are caused by extensional stress on the rocks, and syncline is caused by compressional stress. The stress is always pushing from the oldest layer of rock toward the youngest layer of rock, so in an anticline, where the oldest rocks are in the center of the rock fold, they push outward toward the younger rocks. In a syncline the youngest rocks are in the center of the fold and the oldest rocks are on the outer edge, the older rocks push inward toward the youngest rock.