21.4: Fossil Evidence of Evolution Last updated Save as PDF Page ID 74176 Boundless Boundless 21.4.1: The Fossil Record as Evidence for Evolution 21.4.2: Fossil Formation 21.4.3: Gaps in the Fossil Record 21.4.4: Carbon Dating and Estimating Fossil Age 21.4.5: The Fossil Record and the Evolution of the Modern Horse The detailed fossil record of horses has provided insight into their evolutionary progress. 21.4.6: Homologous Structures 21.4.7: Convergent Evolution 21.4.8: Vestigial Structures 21.4.9: Biogeography and the Distribution of Species