四合屯

辽西四合屯地区中生代火山活动发育，广泛分布着火山作用形成的爆发相、溢流相火山岩。

Volcanic eruption facies and flooding facies are extensively developed in the Sihetun area , west Liaoning .

根据火山活动特征和区域地层对比，将四合屯地区的义县组地层划分为三个岩性段，指出它们分别是早、中、晚三期火山活动的产物。

Based on the stratum comparison and characteristic study , the Yixain Formation can be classified into three members that were formed by volcanic activities of three periods respectively .

野外填图证实，四合屯及其周边地区热河生物群化石主要产于义县组下部的沉凝灰岩和中部的内陆湖泊相沉积岩之中。

Based on the field mapping , we recognized that " Jehol Biota " fossils occurred mainly in tuffite of the lower part and inner lake sedimentary beds of the middle part of Yixian F.

科学家在辽西发现了一种新的暴龙类恐龙——华丽羽王龙，是迄今发现的体型最大的带羽毛恐龙。这批化石标本发现于朝阳市北票上园镇四合屯村，至少包括3个相当完整的个体。

Fossils previously discovered in the province have indicated that some small dinosaurs had bird-like feathers , whereas three fossil specimens of the new tyrannosauroid from the same region show that at least one much larger dinosaur had a feathery coat as well .