Greeting Janus58,

I found this information to be most interesting and so I have made a few simple calculations based on the statistics I found on this website;-

http://www.theatlantic.com/science/...lized-coral-calendar-changes-leap-day/471180/
Using the small ring count of 420 per year dating back roughly 420 million years we actually can determine the Earths position. Consider the cycles of Mars to Earth.

Mars rotation is 24 hours, 39 minutes, and 35 seconds, 687 days for a year, 228 million Kms, equalling approximately 668 small lines at this position

Earth 24 hrs, 365 Days, 150 million Kms, equalling 365 small lines

Estimate Mars position now is at the beginning time of life forms starting. Now if we half the known factors to gain a mid point between the positions of Earth and Mars

Half way between Earth and Mars = A day 24 hrs and 20 minutes, A year 512 days, Distance 190 m kms, equalling approximately 505 small lines.

The position of Earth to get 420 small lines would be at the position roughly a quarter of the distance from Earth to Mars.

Estimating at a constant change then 4 x 420 million years determines the time for Mars to move to Earths position; is roughly 1.2 billion years, to come 137 million kms closer.

Assuming a constant distance change and proportional rotational changes between Earth and Mars, according to coral ageing in 1.2 years we get roughly 137 meters closer to the sun.

Thank you so much for offering this information into the thread. Please advise if my calculations requiring correcting.