A Third Energy Vortex the result of the Third Energy producing tremendous energy levels, affecting space-time and opening a rift of passage.
A Vortex is a small two-way rip in the space-time continuum. It transfers a pocket in space to that of a different time; forward or back. Allowing objects to travel either way, from past to the future and vice versa. The dinosaurs in the Ibis Island Facility came through these vortexes after an experiment. Presumably also more to be in the surrounding jungle. One is found in the Passageway to the Port, another is simulated in Dr. Kirk's Secret Lab. When Rick threw the coin into the Port vortex it was apparently transported millions of years ago in the past.