U-Pb ages from the neoproterozoic Doushantuo Formation, China - PubMed (original) (raw)

. 2005 Apr 1;308(5718):95-8.

doi: 10.1126/science.1107765. Epub 2005 Feb 24.

Affiliations

• PMID: 15731406
• DOI: 10.1126/science.1107765

U-Pb ages from the neoproterozoic Doushantuo Formation, China

Daniel Condon et al. Science. 2005.

Abstract

U-Pb zircon dates from volcanic ash beds within the Doushantuo Formation (China) indicate that its deposition occurred between 635 and 551 million years ago. The base records termination of the global-scale Marinoan glaciation and is coeval with similar dated rocks from Namibia, indicating synchronous deglaciation. Carbon isotopic and sequence-stratigraphic data imply that the spectacular animal fossils of the Doushantuo Formation are for the most part younger than 580 million years old. The uppermost Doushantuo Formation contains a pronounced negative carbonate carbon isotopic excursion, which we interpret as a global event at circa 551 million years ago.

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Comment in

• Geology. The calibration of Ediacaran time.
  Kaufman AJ. Kaufman AJ. Science. 2005 Apr 1;308(5718):59-60. doi: 10.1126/science.1111101. Science. 2005. PMID: 15802590 No abstract available.

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