Magmatic activity of the Franklin Glacier Complex spanned roughly four million years from the Late Miocene to the Early Pleistocene, with the most recently identified volcanic eruption having taken place around 2.2 million years ago.
The magmatic activity at the Franklin Glacier Complex lasted for roughly four million years, spanning from the Late Miocene epoch to the Early Pleistocene era, with the most recent volcanic event taking place approximately 2.2 million years ago.