Answer:
the beginning of the Cenozoic
Explanation:
- The Cenozoic period began with the 65 million years ago and continuous till today and is composed of the modern-day inhabitants and is also known as the age of mammals and these were as the hornless rhinos and flight less dinosaurs.
En el oeste de nuestro país se localiza el relieve montañoso, integrado por la cordillera de los Andes, la pre-cordillera de La Rioja, San Juan y Mendoza, las sierras Subandinas y las sierras Pampeanas
