Either buy a kit, or simply follow the guidelines below. Here are the general materials you'll need: 1  8-foot (2.5-meter) long 1 Â¾-inch diameter galvanized steel poles -- four for approximately every 15 feet (4.5 meters) of batting cage length plus four for the initial frame.
Cenozoic Era. The Cenozoic Era began 65 million years ago with an asteroid impact that killed off a majority of the dinosaurs and ends at the present day.The Cenozoic is commonly divided into three periods: 1  Paleogene (65.5 to 23.03 million years ago).2  Neogene (23.03 to 2.6 million years ago).enozoic Era. The Cenozoic Era began 65 million years ago with an asteroid impact that killed off a majority of the dinosaurs and ends at the present day.
Of, relating to, or being the most recent era of geologic time, from about 66 million years ago to the present. The Cenozoic Era includes the Tertiary Period and the Quaternary Period and is characterized by the formation of modern continents, glaciation, and the diversification of mammals, birds, and plants. See Table at geologic time.