31. The lineages of many varieties continued through the Cenozoic era where some reached very large sizes. 32. The Upper Rhine Plain was formed during the Early Cenozoic era , during the Late Eocene epoch. 33. During the Cenozoic Era , volcanic activity and extensive lava flows in the region dramatically changed the landscape. 34. Local erosion continued into the Cenozoic era . 35. Other processes were at play during the Cenozoic era that shaped the present form of the Guadarammas. 36. This gap in the rock record continues into the Cenozoic era and spans the entire Tertiary period. 37. It a forest from the Cenozoic era , the petrified wood is of primitive conifers and palm trees. 38. During the Eocene epoch of the Cenozoic era , the plant life of the time left behind fossils. 39. Southern Georgia remained submerged by shallow seawater into the ensuing Paleogene and Neogene periods of the Cenozoic era . 40. During the early part of the Cenozoic era , sediments were being eroded away from Iowa rather than deposited.