In fact, BIFs from about 2.0 Ga, when the atmosphere was supposedly becoming more oxygenic, look the same as BIFs from earlier pre-Cambrian BIFs19. From Wordnik.com. [Luskin vs. Science (and Scientific American) - The Panda's Thumb] Reference
Wells is not at odds with modern geochemical thought or the scientific data to assert that primitive Earth volcanoes would have contributed to an oxygenic atmosphere. From Wordnik.com. [Luskin vs. Science (and Scientific American) - The Panda's Thumb] Reference
Some researchers have found that the uranium conglomerates bearing uraninite have a texture and mineralogical makeup (uraninite, pyrite, molybdenite, and sulfides) one would expect if they were deposited by hydrothermal solutions, indicating that the uranium was deposited deep in the earth, far removed from the atmosphere, similar to what is observed happening in the origin of modern and more recently formed uraninite deposits9 (which obviously occurred in an oxygenic atmosphere). From Wordnik.com. [Luskin vs. Science (and Scientific American) - The Panda's Thumb] Reference
They adapted to do oxygenic photosynthesis, to tap the energy in O. From Wordnik.com. [SPACE.com] Reference
It's not just whether the early atmosphere was nonoxygenic or oxygenic. From Wordnik.com. [ScreenTalk] Reference
In the couple of billion years that followed, their oxygenic exhaust fumes slowly did the job. From Wordnik.com. [New Scientist - Online News] Reference
The "invention" of oxygenic photosynthesis so early in Earth's history poses serious problems. From Wordnik.com. [SPACE.com] Reference
Symposium, in a paper titled "Does the Neoarchaean Fortescue group record the earliest evidence for oxygenic photosynthesis?". From Wordnik.com. [PhysOrg.com - latest science and technology news stories] Reference
One school of thought has promoted the idea that some form of oxygenic photosynthesis was invented very early on, soon after the origin of life. From Wordnik.com. [SPACE.com] Reference
Terrestrial life arose through abiogenesis and was Biological evolution acted upon the malleable product and the evolution of oxygenic photosynthesis. From Wordnik.com. [Planet Atheism] Reference
There are two pigment-protein complexes that orchestrate the primary reactions of light in oxygenic photosynthesis: photosystem I (PSI) and photosystem II (PSII). From Wordnik.com. [PhysOrg.com - latest science and technology news stories] Reference
"A pre-GOE emergence for oxygenic photosynthesis is a matter of intense debate, and its resolution lies at the heart of understanding the evolution of diverse forms of life," he said. From Wordnik.com. [University of California, Riverside Campus News] Reference
The arrival of oxygenic photosynthesis via transport of materials by external means, such as meteorites, could profoundly change the direction of biological evolution on a planet's surface. From Wordnik.com. [PhysOrg.com - latest science and technology news stories] Reference
Well-preserved fossils of stromatolites in the Tumbiana Formation, in the Pilbara region, have been dated as 2.72 billion years old, more than 270 million years older than the previous oldest evidence of oxygenic photosynthesis, UNSW doctoral student David Flannery has told a symposium in Perth. From Wordnik.com. [PhysOrg.com - latest science and technology news stories] Reference
His research is focused on genome sequencing and molecular analyses of heliobacteria, proteobacteria and a cyanobacterium with the ability to shift into anoxygenic (oxygen-free) photosynthesis in the presence of sulfide, a possible evolutionary "missing link" between anoxygenic and oxygenic photosynthetic organisms. From Wordnik.com. [PhysOrg.com - latest science and technology news stories] Reference
2004 “U-rich Archaean sea-floor sediments from Greenland — indications of 3700 Ma oxygenic photosynthesis” Earth and Planetary Science Letters, 217 237-244 online 6 December 03. From Wordnik.com. [Yet another reason Paul Nelson is extremely silly - The Panda's Thumb] Reference
Tamzek gives geological evidence showing the lack of oxygen in the Earth’s early atmosphere while Wells also provides a variety of mainstream lines of evidence pointing towards an oxygenic early atmosphere, a view shared by many other scientists. From Wordnik.com. [Luskin vs. Science (and Scientific American) - The Panda's Thumb] Reference
"To determine the oxygenic state of the atmosphere by means of ozone papers. From Wordnik.com. [Up in the Clouds Balloon Voyages] Reference
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