QT:{{”
The basalt cliffs are the margin of a diabase sill, formed about 200 million years ago,[3] at the close of the Triassic period, by the intrusion of molten magma upward into sandstone.[4] The molten material cooled and solidified before reaching the surface. Water erosion of the softer sandstone left behind the columnar structure of harder rock that exists today. The cliffs are about 300 ft (100 m) thick in sections and originally may have reached 1,000 ft (300 m). “}}
near breakup pt of pangea
The Palisades (Hudson River) – Wikipedia https://share.google/FIygcDVnXgcqsVbuX
linkstream2 microblog 