芦山－天全地区晚白垩世－老第三纪冲积扇－湖泊沉积组合

ALLUVIAL FAN-LAKE FACIES ASSOCIATION IN THE LATE CRETACEOUS-PALAEOGENE CONTINENTAL BASIN OF THE TIANQUAN-LUSHAN AREA

分布于芦山—天全地区的大溪砾岩与晚白垩世灌口组、老第三纪名山组属同期异相沉积．大溪砾岩为一大型冲积扇体，该扇体向南东逐渐过渡到以灌口组、名山组为代表的湖相沉积，系陆相盆地中一个典型的冲积扇—湖泊沉积组合实例。

The Daxi Conglomerate,Guankou Formation,and Mingshan Formation distributed inthe Tianquan-Lushan area belong to Late Cretaceous-Palaeogene. There is an obvious facteschange in the relation between the Daxi Conglomerate,Guallkou Formation,and Mingshan Formation. The Daxi Conglomerate is a large alluvial fan, and gradually transists southeastward tothe lake factes deposit of the Guankou Formation and Mingshan Formation. This is a typical example of alluvial fan-lake factes association in a continental basin.