If the lithology and fossil content of two bodies of rock on opposite sides of a canyon are identical,then these remaining outcrops were likely physically connected at one time and formed part of an extensive,sheet-like layer of rock.This idea summarizes the principle of ____________.
A) superposition
B) original continuity
C) original horizontality
D) uniformitarianism

Question

If the lithology and fossil content of two bodies of rock on opposite sides of a canyon are identical,then these remaining outcrops were likely physically connected at one time and formed part of an extensive,sheet-like layer of rock.This idea summarizes the principle of ____________. 
A) superposition 
B) original continuity 
C) original horizontality 
D) uniformitarianism

Quizplus · Accepted Answer

The principle of original continuity states that layers of sediment initially extend laterally in all directions; in other words, they are continuous until they encounter an obstruction. If two bodies of rock on opposite sides of a canyon have the same lithology and fossils, it suggests that they were once connected and formed a single, continuous layer before being eroded and separated by the canyon.

If the Lithology and Fossil Content of Two Bodies of Rock