The Flume Gorge in Franconia Notch State Park, New Hampshire
The granite rock which makes up the walls of the Flume was formed many millions of years ago in ancient geological time. At a later period dark colored lava in a molten state was pushed up from below filling a great crack and smaller side cracks that had been formed in the granite. This lava solidified to form dikes. As ages passed, the main dike was worn away leaving the Flume Gorge. The original Flume thus formed has been further widened by frost and water action. In a few places marked by signs the remnants of the main lava dike are preserved in the bed of the gorge and small branches or off-shoots can be seen along the canyon walls. The lava is darker in color than the granite walls.
The Flume Gorge in Franconia Notch State Park, New Hampshire
The granite rock which makes up the walls of the Flume was formed many millions of years ago in ancient geological time. At a later period dark colored lava in a molten state was pushed up from below filling a great crack and smaller side cracks that had been formed in the granite. This lava solidified to form dikes. As ages passed, the main dike was worn away leaving the Flume Gorge. The original Flume thus formed has been further widened by frost and water action. In a few places marked by signs the remnants of the main lava dike are preserved in the bed of the gorge and small branches or off-shoots can be seen along the canyon walls. The lava is darker in color than the granite walls.