Iron fossil is a kind of plant fossil discovered by Shenzhen geologists in Nan 'ao, Dapeng Peninsula, Shenzhen in 2009. From August 2065438 to August 2004, the research team of Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences, after years of research, found that this fossil is a kind of cycad that lived1900,000 years ago, commonly known as Cycas, which is delicious for some dinosaurs.