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What is the geologic time scale or timeline? Name the Period when there was a spread of grassy ecosystems. How many mass extinctions are shown on the Geologic Time Scale?
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What is the geologic time scale or timeline? Name the Period when there was a spread of grassy ecosystems. How many mass extinctions are shown on the Geologic Time Scale?

User Glutz
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Answer:

It ended during the Mesozoic era.

study information related to the Cenozoic era

Step-by-step explanation:

hope it help

User Sebahat
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