The Cenozoic era has three periods. These periods include the Paleogene, the Neogene, and Quaternary. This era covers a span of 66 million years ago until present time.
Tertiary
The Cenozoic era has three periods. These periods include the Paleogene, the Neogene, and Quaternary. This era covers a span of 66 million years ago until present time.
Several periods of mass extinction
Starting with the oldest, Paleozoic, Mesozoic & Cenozoic.
Mesozoic era and Cenozoic Era
We are living in the Holocene Epoch of the Quaternary Period in the Cenozoic Era of geologic time.
The time periods of the Paleozoic and Mesozoic are subdivided into early middle and late instead of named epochs as they are in Cenozoic periods is due to the basis of the occurrence of particular fossils. It is also based upon the absence or appearance of geological horizons.
Archeozoic and ProterozoicThe two periods of the Cenozoic Era are the Tertiary and the Quatemary.
The question is very muddled but it can be answeredThe Cenozoic Era started with the end of the dinosaurs and is ongoing 65.5 mya to the present thereforeOf the above the following are in the Cenozoic:QuaternaryTertiaryAnd the following are out of (older than) the Cenozoic:Cretaceous
Several periods of mass extinction
During the late Mesozoic and early Cenozoic periods. About 30 to 100 million years ago.
The current era is Cenozoic era. The preceding era was Mesozoic era. However if you are looking for periods in Cenozoic era, the current one is Neogene period, the preceding period was paleogene period.