What type of trap is formed due to changes in rock types or sedimentary features?

A stratigraphic trap is formed due to changes in rock types or sedimentary features. These traps occur when a permeable reservoir rock is sealed by an impermeable layer of rock, such as shale or mudstone, preventing the movement of hydrocarbons. This can create a trap where oil and gas accumulate, making it a potential target for exploration and production.

Stratigraphic trap