Question

why is it said that the rock cycle has neither a beginning nor an end

Answer 1

The rock cycle refers to the process of change that changes one form of the rock to the other.

Igneous rocks can either change into sedimentary rocks or metamorphic rocks.

Sedimentary rocks can either change into metamorphic rocks or ignerous rocks.

Metamorphic rocks can either change into igneous rocks or sedimentary rocks.

The fact that there is no single starting point neither is there an ending point, that is why it is said that rock cycle neither has a beginning or an end.

Answer 2

Rock cycle means the changing of rocks from one form to another form there are basically Three Types of rocks igneous rocks sedimentary rocks and metamorphic rocks as your question that Rock cycle has neither a beginning and end because it didn't have a starting point or I didn't have a ending. For this reason it is said as like your question