Earth: Day Zero • Paper 075 of 512

Isotopic Constraint Framework

Isotopic measurements provide some of the most powerful constraints available to planetary reconstruction.

Unlike large-scale geometry, isotopic observations operate at the material level.

Independent Dataset

Isotopic measurements represent an evidence stream largely independent of topographic, geometric, and tectonic observations.

This independence makes isotopic relationships particularly valuable when evaluating competing models.

Constraint Role

Earth: Day Zero treats isotopic observations as non-negotiable constraints that must be accommodated by any viable reconstruction.