See my answer on other thread. "Consciousness" can be taken as "that which experiences".
If both are dependent which comes first and how... the experience or the 'that which experiences'?
That's the point in favor of naive realism as a method of analyzing reality...Realism and materialism only claims things and phenomena are it does or it shouldn't much care about the distinction between observers and observed...in the end you are left with bits and pieces and pure interaction as both experiencer and experience, things and subjects, are reduced to phenomena. As the experience, being the trade result, the added value of an interaction between 2 or more systems, 2 or more "agents", can well itself be considered an "agent" in some other context...there is no absolute place older for subject or object other then contextual frames of reference.
...it comes to mind the distinction between matter an energy and how both can mutually interchange...