Late Cretaceous intraplate silicic volcanism in the Lake Chad region: incipient continental rift volcanism vs. Cameroon Line volcanism

John Gregory Shellnutt1, Tung-Yi Lee1, Pei-Keng Torng2 and Chih-Cheng Yang3, (1)NTNU National Taiwan Normal University, Taipei, Taiwan, (2)CPC Taiwan, Exploration and Production Business Division, Miaoli, Taiwan, (3)Chinese Petroleum Corporation-Taiwan, Miaoli, Taiwan