You’re absolutely right, can’t believe I missed that. That datum’s the Dhala crater in India, which has its age listed as “> 1700 < 2100” Ma. Dropping the angle brackets and the spaces gave “17002100″. The three other data points over 2400 Ma (the “Jebel Waqf as Suwwan”, “Tunnunik (Prince Albert)”, and “Amelia Creek” craters) got misdated for similar reasons. Better fix the data file and replot. One sec....
Edit: fixed those four points, but I now notice there’s a Santa Fe crater that’s mis-sized at 613 km instead of “6-13”.
Edit 2: OK, think that’s rectified as well. If anyone’s wondering how I handled these ranges, I did the lazy thing and took the arithmetic mean of the upper & lower bounds.
I think the 10^7 Myr one is an error, seeing as the earth is less than 10^4 Myr old.
You’re absolutely right, can’t believe I missed that. That datum’s the Dhala crater in India, which has its age listed as “> 1700 < 2100” Ma. Dropping the angle brackets and the spaces gave “17002100″. The three other data points over 2400 Ma (the “Jebel Waqf as Suwwan”, “Tunnunik (Prince Albert)”, and “Amelia Creek” craters) got misdated for similar reasons. Better fix the data file and replot. One sec....
Edit: fixed those four points, but I now notice there’s a Santa Fe crater that’s mis-sized at 613 km instead of “6-13”.
Edit 2: OK, think that’s rectified as well. If anyone’s wondering how I handled these ranges, I did the lazy thing and took the arithmetic mean of the upper & lower bounds.