The era ended with the K-T mass extinction. A meteor is a meteoroid that has entered the Earth's atmosphere, usually making a fiery trail as it falls. It is sometimes called a shooting star. Most burn up before hitting the Earth. A meteorite is a meteor that has fallen to Earth.
Meteorites are either stone, iron, or stony-iron.
Meteoroids are tiny stones or pieces of metal that travel through space. A million is a thousand thousand. The dinosaurs lived millions of years ago. The Miocene epoch was a geologic time span that lasted from 24 million to 5 million years ago. Kelp forests appeared in the seas.