GENERAL GEOLOGY

Detailed explanation-1: -1 Uniformitarianism uniformitarianism a principle that geologic processes that occurred in the past can be explained by current geologic processes Geologists estimate that Earth is about 4.6 billion years old, an idea that was first proposed by James Hutton in the 18th century.

Detailed explanation-2: -Scientists look at modern-day geologic events-whether as sudden as an earthquake or as slow as the erosion of a river valley-to get a window into past events. This is known as uniformitarianism: the idea that Earth has always changed in uniform ways and that the present is the key to the past.

Detailed explanation-3: -In geology, uniformitarianism has included the gradualistic concept that “the present is the key to the past” and that geological events occur at the same rate now as they have always done, though many modern geologists no longer hold to a strict gradualism.

Detailed explanation-4: -uniformitarianism, in geology, the doctrine suggesting that Earth’s geologic processes acted in the same manner and with essentially the same intensity in the past as they do in the present and that such uniformity is sufficient to account for all geologic change.