https://gcmdservices.gsfc.nasa.gov/kms/concept/81cc3a0f-1084-42b4-9e40-637aad46aff4
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definition | Stage 2 of the Cambrian is the unnamed upper stage of the Terreneuvian series. It lies atop the Fortunian and below Stage 3 of the Cambrian. It is commonly referred to as the Tommotian, after the Cambrian stratigraphy of Siberia. Neither the upper nor lower boundary has yet been defined by the International Commission on Stratigraphy. | ||||||
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in scheme | chronounits original |