Fossil tooth-enamel carbon-isotope records document a widespread increase in C4-plant biomass between 8 and 6 Ma across Asia, Africa, North America and South America, with earlier increases at lower latitudes.
claim:event:c4-grassland-expansionFossil tooth-enamel isotopes record a widespread, regionally asynchronous increase in C4-plant biomass; they do not alone demonstrate open grassland or faunal adaptation.
Fossil tooth-enamel carbon-isotope records document a widespread increase in C4-plant biomass between 8 and 6 Ma across Asia, Africa, North America and South America, with earlier increases at lower latitudes.
claim:event:c4-grassland-expansion