What kind of stress causes a anticline?

Answer 1

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.

Answer 2

Compression stress causes an anticline. This stress occurs when rock layers are pushed together, causing them to bend upwards and form the arch shape characteristic of an anticline.