甘肃中生代陆相沉积分布广泛,发育良好,但在地层划分与对比方面还存在不少问题和分歧意见。现根据在野外工作的实践与认识,并综合前人资料予以讨论。一、甘肃陆相中生代的生物群 The Mesozoic continental sediments in Gansu are widely distributed and well developed, but there are still many problems and disagreements on stratigraphic division and contrast. Now based on the practice of field work and understanding, and based on previous data to be discussed. First, Gansu terrestrial Mesozoic biota