Geology
Approximately 220 million years ago, during the late Triassic period, the supercontinent Pangaea began to break apart. The focus of the rifting began somewhere between where present-day eastern North America and north-western Africa were joined.
As in all rifting environments, grabens formed. Many of these grabens were created, but for some of them, extension stopped before full rifting occurred. Where only partial rifting occurred, basins formed. By definition, a basin is any area that collects sediments. These "aborted rifts" (rifts that are tectonically inactive and no longer collecting sediments) extend from Alabama to Newfoundland.
Along certain basins, rifting was not partial. Where full rifting occurred, the Atlantic Ocean was created. It is important to note that along these rifts, magmatic activity never stopped, as shown by the ongoing eruption of lava along the Mid-Atlantic Ridge.
The Fundy Basin is one in a series of these failed rifts. During its rupture, tholeiitic basaltic lava erupted, producing a sequence of continental tholeiitic basalts. These tholeiitic basalts form a volcanic mountain range known as North Mountain.
Read more about this topic: Fundy Basin