Inter-dimensional fissure

An interdimensional fissure is a "crack" in time, sometimes accompanied by temporal energy discharge, nicknamed a "Time Geyser" by Stacey. It is through one of these vents that Stacey falls, following her return from a camping trip with her father and sister, setting off the events in their fourth adventure, Time and Stace.

The interdimensional fissures in Einstein's Plateau are neither permanent fixtures, nor permanently fixed. Although one of the most commonly appearing fissures exists in the spot where Chase and Stacey meet, it is only temporary. Fissures exist for no more than several seconds before closing up, to reappear in other random locations around town. There is no discernible pattern to when or where the next fissure will appear, though as many as twelve are believed to exist at any one time.

Time Geyser

A "Time Geyser" is a kinetic energy discharge accompanying the opening of one of these fissures, a discharge which may continue at random intervals for as long as the fissure exists. Unlike its volcanic equivalent, a Time Geyser does not eject steam, but rather a coalescing form of energy particles possessing the ability to distort time; like its volcanic equivalent, though, this energy gives off heat that may be as much as several hundred degrees celsius - therefore anyone exposed for a protracted length of time is unlikely to survive.

Note: Although Stacey Stevens, who coined the name "Time Geyser", did manage to survive limited exposure, it is believed that she was lucky, and it doesn't seem feasible that these geysers could ever be safely utilised for the purposes of time travel in future.