Perhaps you recognize this map. It was produced by the National Geographical Data Center in 1996. It shows the coastal age of the ocean bottom, which you know is no older than 185 million years old not one acre older, anywhere.

Yet, this map misrepresents. It should show us 10 million year segments going back in time. Instead it uses a rainbow of 7 plus colors to indicate arbitrary breaks in age. Green, for example, is 35 million years, while red shows our most recent 9.6 million years, and this red almost blends in with the orange. Very pretty, but confusing. In the second map I have actually broken the map into 10 million year segments going back using the same information.

 


 

 Simple calculation shows that the red spread area represents a minimum of 5% of Earth's surface. It's actually closer to 8%. But think of it, this same 5 % added on for a same size Earth for 200 million years would make a surface the size of the whole Earth.

The segments are exponentially smaller going back in time. In fact, each segment's square mileage is 100% greater than the one that came before it and 50% less than the square mileage of the previous 10 million years. (Or near that family of figures.) Please examine the chart below and the second map.


 Here is a rough calculation of the square mileage of spread going back in time.
Today   0-10 MYA
10-20 MYA
20-30 MYA
30-40 MYA
40-50 MYA
50-60 MYA
60-70 MYA
70-80 MYA
80-90 MYA
20,000,000 Sq. miles
10,000,000 Sq. miles
5,000,000 Sq. miles
2,500,000 Sq. miles
1,250,000 Sq. miles
625,000 Sq. miles
312,500 Sq. miles
156,250 Sq. miles
78,125 Sq. miles
90-100 MYA
100-110 MYA
110-120 MYA
120-130 MYA
130-140 MYA
140-150 MYA
150-160 MYA
160-170 MYA
170-180 MYA
39,062 Sq. miles
19,531 Sq. miles
9,765 Sq. miles
4,882 Sq. miles
2,441 Sq. miles
1,220 Sq. miles
610 Sq. miles
305 Sq. miles
152 Sq. miles
         

Are my calculations wrong?? Please check my figures against yours, or any ones.

Between 5 and 8 percent of the Earth's surface did not exist 10 million years ago. Are the undersea rifts spreading faster and 'subducting' faster? Or is the Earth simply growing faster?
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If I am correct, how is it possible that a same-size Earth produces, exponentially; larger and larger rift spreads for, at least, 185 million years?

Try this one. In simple terms over 50% of the under ocean rift area exposed itself in the last 60 million years, compared to the other half taking 125 million years or more or to put it another way

Two thirds of the Oceanic Plate two thirds, was created since the dinosaurs became extinct. (Or 40% of the whole Earth.)

 

Special note for Paleontologists:
It's significant to note that northeast South America and the armpit of Africa tore apart at the 68 million year color range. This brings the tear-apart awfully close to the extinction event, doesn't it? Hemispheric migration of dinosaurs between Africa and South America through this time is a given isn't it? I'm a bit confused by the news reports that question dinosaur migration across this area, aren't you?
Not the point here.