Diastrophism

Diastrophic movement can be classified as two types, folding and faulting, tilted beds usually are part of a larger syncline or anticline.

There are various theories of the cause of diastrophic movement such as being the result of pressures exerted by convection currents in the mantle or the rise of magma through the crust.

Subsurface conditions also cause subsidence or uplift, known as epeirogeny, over large areas of Earth's surface without deforming rock strata.

[3] In the late 19th Century, Eduard Suess proposed his eustatic theory that provided the underpinnings for Chamberlin's explanation of diastrophism.

[4] In volume two of Das Antlitz der Erde[5] Suess set out his belief that across geologic time, the rise and fall of sea levels were mappable across the earth, that is, that the periods of ocean transgression and regression were correlatable from one continent to another.