Question

The ________ division of the geologic time scale is an era of the phanerozoic eon.

Answer 1

Answer:

The Cenozoic division of the geologic time scale is an era of the phanerozoic eon.

Explanation:

The Phanerozoic Aeon is the eon we live in and was started 542 million years ago. The word Phanerozoic derives from the Greek and means apparent life (zoico) (faneros).

The Phanerozoic Aeon is divided into three ages:

• Cenozoic Era
• Mesozoic Era
• Paleozoic Era

The ages are divided into periods. The Cenozoic Era is divided into the periods:

• Quaternary
• Neogen
• Paleogen

Answer 2

The Proterozoic division of the geologic time scale is an era of the Phanerozoic eon.

Further Explanations:

The Phanerozoic era is the existing geologic eon of the geologic time period. It can also be stated as the era of ample flora and fauna on Earth. It encompasses an eon of about 541 million years and is believed that it began with Cambrian Period when faunas first developed rigid shells preserved as fossil record. About 96% of life form on Earth got streaked out 251 million centuries ago. It was the era of extinction of dinosaurs about 65 million ages ago with the advent of mammals. Earth’s climate had changed several times during the era and during the demise of the Precambrian era, much of the earth was roofed with glaciers. During initial phase of Phanerozoicera, the climate became warm and tropical. Since then Earth's climate went through four cycles of frosty glaciers and warm humid seas.

The Phanerozoic era of noticeable life is being alienated into three major eras on the basis of their characteristic groupings of life-forms, namely the Paleozoic spanned amid 541 million to 252 million years, Mesozoic spanned for 252 million to 66 million years, and lastly the Cenozoic spanning from 66 million years ago till present.

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Answer Details

Grade: High School

Subject: Geography

Chapter: Phanerozoic era  

Keywords:

Phanerozoic era, geologic eon, flora, fauna, Cambrian Period, mammals. Earth’s climate, Precambrian era, Phanerozoic era, warm, tropical, of frosty glaciers, Paleozoic, Mesozoic, Cenozoic,