Encyclopedia of Evolution.pdf - Online Reading Center

continental drift
During geological time, the continents have moved and rearranged. In these diagrams, the shapes of the modern continents are indicated by dark
shading, the true rim of each continent by heavy lines. Lightly shaded areas indicate where shallow seas covered areas of continents. (a) At the end of
the Permian period, the continents had mostly coalesced into a single continent, Pangaea. (b) By the Cretaceous period, the modern continents were
beginning to take shape. South America (d), Africa (e), Antarctica (f), India (g), and Australia (h) were still connected or very close together and shared
many plants and animals. North America (a) and Eurasia (b, c) were not yet widely separated and shared many plants and animals. (c) The continents
today. (Figures continue on opposite page.)