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What struck me is the age of the oldest known seawater. That's on the order of 2% of the age of the earth. There are plenty of rocks that are much older. I gues
by mtdewcmu 13y ago
What struck me is the age of the oldest known seawater. That's on the order of 2% of the age of the earth. There are plenty of rocks that are much older. I guess seawater doesn't keep very well.
- fhars 13y agoFor one, rocks don't evaporate in the sunlight at our distance from the sun.
- mtdewcmu 13y agoThat's true. But rocks erode at a rapid pace in comparison to the age of the earth. Apparently, very little is left for geologists to study from earlier than about 1 billion years ago. And there is a tremendous amount of groundwater deep underground, with some of it trapped by rock formations.