I want to know the answer to the following question:
To what period does the laurissilva forest date back to?
All the background I'm provided with is that "In Gerês both deciduous and coniferous forests can be found, an extremely rare worldwide mature mediterranean forest remain in some parts of the Arrábida mountain and a subtropical laurissilva forest, dating back to the Tertiary period, covers its largest continuous area in the world in the Madeira main island.". Is that enough to answer the question?