cenozoic

Ah, it's apparently Eurasian plate Cenozoic ocean floor uplifted by Indo-Australian plate subduction, with volcanism.

The temperature and CO2 concentrations are also unusually low for the Cenozoic Era.

This was during the Cenozoic era when mammals first rose to dominance.

Here's the paper: The first day of the Cenozoic Sean P.

Not unless you're using the term in a way that includes the Late Cenozoic Ice Age that began 34 million years ago and which is ongoing.

Especially since all parks are technically Cenozoic Park.

The Late Cenozoic Ice Age,[5][6] or Antarctic Glaciation,[7][8] began 34 million years ago at the Eocene-Oligocene Boundary and is ongoing.[5] It is Earth's current ice age or icehouse period.

Blocks along the fingers represent the periods that followed, such as the Jurassic (dinosaurs!) and the Cenozoic (in which humans evolved, a microscopic sliver at the tip of a fingernail)..

> the only extant group that survived into the Cenozoic are the mammals.

Indeed, it has been alternatively argued that changes in the sea floor spreading rate contributed to the Cenozoic pCO₂ decline, although the magnitude of the decrease means that this is unlikely to account for the entirety of the pCO₂ change.

>Organisms that co-evolved within now-extinct ecosystems from the Cenozoic to the Pleistocene may also emerge and interact with our modern environment in entirely novel ways.

Here, we present the first detailed record of the Cenozoic major ion chemistry of seawater and show that [Ca²⁺sw] has the potential to control key processes that impact the carbon cycle.

As they sank to the stagnant sea floor, they were incorporated into the sediment; the resulting draw-down of carbon dioxide has been speculated to have helped transform the planet from a "greenhouse Earth" state, hot enough for turtles and palm trees to prosper at the poles, to the current icehouse Earth known as the Late Cenozoic Ice Age.

For instance in Eocene the climate remained fairly warm and homogeneous (the most uniform in the Cenozoic).

Have you looked at climate changes over the entire Cenozoic, let alone the climate record over the last 300,000 years?

A ~fivefold decrease in the atmospheric concentration of CO₂ took place during the Cenozoic.