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News Release 11-002
Widespread Ancient Ocean "Dead Zones" Challenged Early Life
Persistent lack of oxygen in Earth's oceans affected animal evolution
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![Photo of Little Horse Canyon near Orr Ridge, Utah.](/news/mmg/media/images/dead_zones1_f.jpg)
Little Horse Canyon near Orr Ridge, Utah: many of the study samples were collected nearby.
Credit: Ben Gill, UC-Riverside and Harvard University
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![Photo of scientist Tim Lyons looking at a sample from the Georgina Basin in Queensland, Australia.](/news/mmg/media/images/dead_zones2_f.jpg)
Scientist Tim Lyons looks at a sample from the Georgina Basin in Queensland, Australia.
Credit: Ben Gill, UC-Riverside and Harvard University
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![Photo of drill core collected near Queensland, Australia.](/news/mmg/media/images/dead_zones3_f.jpg)
Drill core collected near Queensland, Australia contains a record of past low-oxygen conditions.
Credit: Bill Gill, UC-Riverside and Harvard University
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The Notch Peak Formation, located in Lawsons Cove, Utah, preserves ancient biogeochemical events.
Credit: Ben Gill, UC-Riverside and Harvard University
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Sampling Utah's Big Horse Limestone; it records the trilobite extinction and other events.
Credit: Ben Gill, UC-Riverside and Harvard University
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