Uniformitarianism says,

____________ is key to past/future.Processes stay the ________.

Change=_______ or gradual.

Sedimentary layers-

Formed (rock) by the accumulation and consolidation of mineral and organic fragments that have been deposited by water, ice or wind.

Catastrophism says,

Key ______ catastrophic

event key to present.

Change=_________.

Erosion-

The wearing away of rocks and other deposits on the earth's surface by the action of water, ice, wind, etc.....