We dig down in sedimentary rocks to recover fossils from earlier times. We're told the cross section of rocks in the Grand Canyon represents many millions of years, of slow steady accumulation of sediments one on top of the other.
The Grand Canyon is what, 3000 feet deep?
Does this mean the circumference of the earth has increased by three thousand feet (or five or ten) since the early days of the earth?
All this sediment comes from somewhere. Some of it must come from space, and thus be a net add to the mass of the earth, attracted by earth's gravitational field. I wonder if anyone's ever calculated this?
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