4.4 Billion Year Old Oceans ?!?!?!

by bitznbitez

Reading about meteorites I began to look into the high water content of carbonaceous chondrites.   It is alleged these can reach 22% water.   This eventually led me to discover the Jack Hill Zircon.   These little rocks have apparently been causing a ruckus for a while now.   It caused NASA to allow the following words to be uttered ….

Since then, however, scientists have found zircons that date to almost 4.4 billion years ago.

Among the first important discoveries, says Watson, came out in 2001. Analysis of the relative amounts of different isotopes of oxygen indicated that the ratio was skewed toward “heavy” oxygen-18, as opposed to the more common “light” oxygen-16. “When a geologist sees a heavy oxygen signature in rocks,” said Watson, “it’s commonly understood to be a sign that the rocks formed in cool, wet, sedimentary processes at the Earth’s surface.” Thus, the magma that eventually gave rise to the zircons might have been formed from what had once been sediments deposited on the floor of an ancient ocean.2006 NASA Earth Observatory

Now I am still trying to get my head around that last sentence given everything I’ve been taught about the formation of the earth from a scientific view.   Really the number of ways that causes mischief are hard to fully discern initially.

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