Resultado da Busca
The Tonian (from Ancient Greek: τόνος, romanized: tónos, meaning "stretch") is the first geologic period of the Neoproterozoic Era. It lasted from 1000 to 720 Mya (million years ago). Instead of being based on stratigraphy, these dates are defined by the ICS based on radiometric chronometry.
- Tônico (geologia) – Wikipédia, a enciclopédia livre
Na escala de tempo geológico, o Tônico ( português...
- Stenian - Wikipedia
The Stenian Period ( / ˈstiːni.ən / STEE-nee-ən, from...
- Tônico (geologia) – Wikipédia, a enciclopédia livre
Na escala de tempo geológico, o Tônico ( português brasileiro) ou Tónico ( português europeu)[ 1] é o período da era Neoproterozoica do éon Proterozoico que está compreendido entre há 1000 milhões de anos e 850 milhões de anos, aproximadamente.
The Stenian Period ( / ˈstiːni.ən / STEE-nee-ən, from Ancient Greek: στενός, romanized : stenós, meaning "narrow") is the final geologic period in the Mesoproterozoic Era and lasted from 1200 Mya to 1000 Mya (million years ago). Instead of being based on stratigraphy, these dates are defined chronometrically.
It is the last era of the Precambrian Supereon and the Proterozoic Eon; it is subdivided into the Tonian, Cryogenian, and Ediacaran periods. It is preceded by the Mesoproterozoic Era and succeeded by the Paleozoic Era of the Phanerozoic Eon.
The Tonian Period marked the last interval of relative inactivity of the planet’s atmosphere and geology. Earth’s landmasses were consolidated into a single supercontinent called Rodinia at the beginning of the Stenian Period.
- John P. Rafferty
30 de ago. de 2018 · A recent study provides new details about the evolution of life on Earth during the Tonian Period, which spanned from 1000 to 720 million years ago. The Tonian occurred after a roughly one billion year stretch of time when the environment, life, and lithology of Earth was relatively stable.
1 de jan. de 2020 · The Tonian and Cryogenian periods together span from 1000 to c. 635.5 Ma and are currently chronometrically divided at 720 Ma. The early Tonian followed the amalgamation of the Rodinia supercontinent and is a time for which the stratigraphic, chemostratigraphic, and fossil record is relatively sparse and poorly dated.
