The Palisades Sill as seen from the Palisades Interstate Parkway. The Hudson River is the background. The formation was caused by the rifting of Pangaea in the Triassic
Location of the different branches of the Caledonian/Acadian belts at the end of the Caledonian orogeny (Early Devonian). Present day coastlines are indicated in grey for reference. Later in geological history, the Atlantic Ocean opened and the different parts of the orogenic belt moved apart.
Pangaea was the global supercontinent which formed in the Palaeozoicera. The process started about 450 million years ago (mya) and was complete by 210 mya.
Pangea was the latest of a series of global supercontinents. They formed at various times since plate tectonics began on Earth.Generally Pangea and Gondwana are considered as parts of the same supercontinent Gondwana-Pangea.(Reference -https://www.researchgate.net/publication/286392394_Earth_as_an_Evolving_Planetary_System).