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5.6.2.3. Cenozoic

Cenozoic era (65 m.y. to today)

The Cenozoic Era is divided into two periods:

The main events of the Cenozoic were:

  • The continents that had been fragmented from Pangea continued their separation to their current position.
  • When the fragmented continents of Pangea collided, mountain ranges such as the AlpsPyrenees, and Himalayas were formedThe Alpine orogeny was developed .
  • The Atlantic Ocean continues to expand.
  • Climate cooling. In the Quaternary there were four glaciations that alternated with other warmer interglacial periods.
  • Diversification of mammalsThey are spread all over the Earth.
  • Appearance of hominids and the human species.

Continentes en el Cenozoico

orogenesis.jpg (Imagen JPEG, 350 × 178 píxeles) - Escalado (0 %). (s. f.). Recuperado a partir de http://www.astroyciencia.com/wp-content/uploads/2008/11/orogenesis.jpg

Life in the Cenozoic

During the Cenozoic there was a great diversification of birds, which appeared from theropods, a type of dinosaurs.

The mammals also diversified, occupying ecological niches left by the dinosaurs were extinct.

The nummulites are a type of protozoa characteristic of the Tertiary.

Flowering plants were developed.

The hominids and the human species appeared, with which the Quaternary would begin.

Nummulites

Nummulites.Hugo.soria at the French language Wikipedia [GFDL or CC-BY-SA-3.0], via Wikimedia Commons

Mesohippus, was an ancestor of the horse, lived in North America about 30 my

Evolución de los equinos

By H. Zell (User:Llez) - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=11633334

Smilodon, felines known as "saber teeth" lived in America between 2.5 million and 10,000 years ago.

Smilodon

By Boris Dimitrov (Own work) [CC BY-SA 3.0 or GFDL], via Wikimedia Commons


         

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Biology and Geology teaching materials for Compulsory Secondary Education (ESO) and Baccalaureate students.