generate questions: During the mid-Eocene, it is believed that the drainage basin of the Amazon was split along the middle of the continent by the Purus Arch. Water on the eastern side flowed toward the Atlantic, while to the west water flowed toward the Pacific across the Amazonas Basin. As the Andes Mountains rose, however, a large basin was created that enclosed a lake; now known as the Solimões Basin. Within the last 5–10 million years, this accumulating water broke through the Purus Arch, joining the easterly flow toward the Atlantic.
In which point did the drainage basin of the Amazon split? {sep_token} In which direction did the water on the eastern side flow? {sep_token} What is the name of the basin that was created from a enclosed lake? {sep_token} How long ago was it when the water broke through the Purus Arch? {sep_token} Where did it join in the direction of its flow? {sep_token} When was the drainage basin of the Amazon believed to have split in the middle of South America? {sep_token} Where did water to the east of the Amazon drainage basin flow towards? {sep_token} Where did water to the west of the Amazon drainage basin flow towards? {sep_token} What did water that flowed towards the Pacific have to flow across during the mid-Eocene? {sep_token} What basin was formed when the Andes Mountains rose? {sep_token} During what period the drainage basin of the Amazon likely split? {sep_token} Near where in the continent is it believed that the Amazon basin split? {sep_token} Where did water on the eastern side of the amazon basin travel after the split? {sep_token} Where did the water in the Amazon Basin flow towards when moving west? {sep_token} What is the lake known as which was created by the rise of the Andes Mountains? {sep_token}