the salt sea-well and the trident-mark are 'tokens,' we are told, of the defeat of Poseidon; the olive is the 'token' of the triumph of Athena.
Harrison identifies the sacred olive on the Acropolis as the primary symbol of Athena's victory over Poseidon in the mythic contest for Attica, making it a token of divine sovereignty and civilizational order.
, Themis: A Study of the Social Origins of Greek Religion, 1912thesis