The type of tension-free, melted ecstasy exemplified by the feeling of cosmic unity can be referred to as ‘oceanic ecstasy’ (in contrast to ‘volcanic ecstasy,’ to be described later in relation to BPM III).
Grof establishes a phenomenological taxonomy of ecstasy — oceanic versus volcanic — grounded in perinatal matrix theory, distinguishing dissolution-in-unity from rapture born of extremity.
, Realms of the Human Unconscious: Observations from LSD Research, 1975thesis