A Brontoscorpio used this Anomaly to travel between the Spaghetti Junction and the creature's home in the Silurian. Evan Cross and Dylan Weir also went into the Silurian through this Anomaly in search of the Brontoscorpio.
Dylan returned through this Anomaly from the Silurian with the Brontoscorpio's stinger, then almost immediately went back through to save Evan. While searching the Spaghetti Junction for Kieran Coles, Connor Temple went through this Anomaly into the Silurian and met up with Dylan.
After rescuing Evan, Connor and Dylan took him with them back through the Anomaly into the Spaghetti Junction. The Anomaly presumably closed with the other Anomalies in the Spaghetti Junction after Evan and Dylan unintentionally changed the Timeline.