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 …

Tonian Period, earliest of the three periods of the Neoproterozoic Era, extending from 1 billion to approximately 720 million years ago. It immediately followed the Stenian Period of the Mesoproterozoic Era (which lasted from 1.2 billion to 1 billion years ago) and was succeeded by the Cryogenian Period (approximately 720 million to ...

It is preceded by the Mesoproterozoic era and succeeded by the Paleozoic era of the Phanerozoic eon, and is further subdivided into three periods, the Tonian, Cryogenian and Ediacaran.

The Tonian was the first geological period in the Neoproterozoic era. It lasted from 1000 million years ago (mya) to 720 mya. The supercontinent Rodinia began breaking in this period. Acritarchs radiated during the Tonian.

Aug 30, 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.

Jan 1, 2020 · The Neoproterozoic Era (1000–c. 538 Ma) is currently subdivided into the Tonian, Cryogenian, and Ediacaran periods (Knoll et al., 2006). The start of the Tonian Period is assigned a Global Standard Stratigraphic Age (GSSA) placed at precisely 1000 Ma (Plumb, 1991).

Sep 28, 2018 · The Tonian Period (ca. 1000-720 Ma) follows the 'boring billion' in the Mesoproterozoic Era and precedes 'snowball Earth' glaciations in the Cryogenian Period. It represents a critical transition in Earth history.

Apr 1, 2025 · The Tonian Period is the earliest of the Neoproterozoic Era and lasted from approximately 1 billion to 720 million years ago. The Tonian occurred between the Stenian Period of the Mesoproterozoic Era, and the Cryogenian Period of the Neoproterozoic Era.

The Tonian is the first period of the Neoproterozoic, occuring after the Stenian (Mesoproterozoic Era) and before the Cryogenian Period. What happens during this time? Above: …

The Tonian period saw a great influx of the diversified species of the Acritarchs which profusely grew through the entire Neoproterozoic era and only during the Cryogenian glaciations they face a small decrease in their number. During the Tonian period, Rodinia was the super continent.