I want to know the answer to the following question:
When did the Tertiary period begin?
All the background I'm provided with is that "The earliest good evidence for oligochaetes occurs in the Tertiary period, which began 65 million years ago, and it has been suggested that these animals evolved around the same time as flowering plants in the early Cretaceous, from 130 to 90 million years ago.". Is that enough to answer the question?
Answer: yes