I want to know the answer to the following question:
Avian species such as Anchiornis huxleyi and Xiaotingia zhengi are from which time period?
All the background I'm provided with is that "The earliest known avialan fossils come from the Tiaojishan Formation of China, which has been dated to the late Jurassic period (Oxfordian stage), about 160 million years ago.". Is that enough to answer the question?