The Upanishads are separated from the Brahmanas by treatises called __________

It is contained within the Shatapatha Brahmana (Brahmana is a collection of ancient Indian texts with commentaries on the Vedas.), which is itself a part of Shukla Yajur Veda. Brihad means great. Aryanka means pertaining to the forest. Aranyaka in the Upanishadic context refers to a treatise to be read or expounded by anchorites in the quiet of the forest.