Earth materials (origin of oldest rocks): The earliest rocks formed when molten magma from deep within the young Earth erupted and solidified. Name the rock type produced by the cooling and crystallization of magma (e.g., from volcanic eruptions). Choose the correct option.

Given data

• Oldest rocks solidified from molten magma during early Earth history.

Concept/ApproachRocks formed by the solidification of magma or lava are igneous rocks (e.g., basalt, granite are specific igneous types). Sedimentary rocks form from deposited fragments; metamorphic from transformation of pre-existing rocks.

Final AnswerIgneous rocks