Geochemical Characteristics of Fossil Ginkgo huttonii Cuticles from the Jurassic in Gansu, ChinaSHI Yajun, SUN Bainian, ZHANG Chengjun and YAN Defei (Key Laboratory of Western China's Environmental Systems of the Ministry of Education, College of Earth and Environmental Science, Lanzhou University, Lanzhou, Gansu 730000)A comparison analysis of geochemical characteristics was made on cuticles of Jurassic fossil Ginkgo huttonii from the Minhe Basin in Gansu and extant Ginkgo b…