What was the Earth Like During the Miocene Epoch?

The Miocene (English: Miocene, symbol: MI) is the first period of the Neogene in the geological age, starting from 23 million to 5.33 million years ago, between the Oligocene and Pliocene. between. The Miocene was named by Charles Lyle. This name comes from the Greek ( mein (English means "less") and ( kainos (English) means "new") in English means "less recent", that is, "the distance is still early" because Modern invertebrates are 18% fewer than the Pliocene.

Miocene Epoch (Miocene Epoch; about 23.3 million years ago ~ 5.3 million years ago)

In March 2004, "Science" Weekly reported the late Miocene human fossil tooth fossils found at another site in Awash.

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During the Miocene (15 million to 12 million years ago), the ancient land of Gansu showed a derivative, and the suitable climate enabled the development of large mammals. Due to the lack of geographical barriers, communication and migration were very convenient and frequent.

The point Cangshan metamorphic core complex distributed along the Red River Fault Zone (RRFZ) is an incomplete metamorphic core complex. It consists of two units with very different characteristics, including tectonic rocks that are intruded into the amphibole facies of the same tectonic feldspar granite. And the detached fault zone of the green schist facies. The lower rock includes L-type mylonite or L >> S-type mylonite which has a high-temperature structural combination and indicates the direction of the left-slip sliding movement. The detached fault zone is a low-temperature shear zone extending from the upper wall to E to SE, and is composed of typical SL mylonite with shear strain and compressive strain.

The low-temperature tectonic rocks also include several mylonitized wart-like feldspar granite intrusive bodies developed in the lower plate.

Miocene nuclear complex

Metamorphic core complexes are juxtaposed with undeformed Mesozoic sedimentary rocks on the west side, and affected by Quaternary faults in the east are Pleistocene- Holocene sedimentary basins distributed along the Erhai Lake. Based on the structural study of the Dangcangshan metamorphic core complex, combined with the geochronology and paleomagnetic analysis of the neighboring metamorphic core complex, the metamorphic core complex appears in a fan-shaped area between the Honghe fault and Sagaing fault zone in Southeast Asia. It is related to the regional stretching effect during the Oligocene-Miocene period, and the stretching effect is caused by the differential rotation of the Indosinian block. The reason is due to the clockwise rotation and return of the Indian plate that began to obliquely dive at about 33Ma Retreat. ^[3]