The structure and taphonomy of araucarian stumps and logs from the Jurassic of Patagonia are analyzed. Density measurements of these trees indicate that they were organized into woodlands that occupied extensive paleosurfaces affected by repetitive volcanism from nearby areas. At least two episodes of araucarian woodlands were identified, both terminated by explosive volcanism. As a result, fallen trees and stumps were immediately covered by massive ash falls that favored rapid silicification. The abundance of Araucaria mirabilis seedcones in the surroundings suggests that araucarian woodlands produced this type of cone. Paleoecological, sedimentological, and paleoclimatical data are used to better understand the life history of one of the best well preserved examples of Jurassic tree vegetation. The continuous association of araucarian trees with cheirolepidaceous conifers during most of the Jurassic and Early Cretaceous suggests that the Patagonian landscape was covered by open woodlands or closer forests as the dominant plant formation.

分析了来自巴塔哥尼亚侏罗纪的白垩纪树桩和原木的结构和拓扑学。这些树木的密度测量表明，它们被组织成林地，这些林地受到附近地区重复火山作用的影响而占据了广阔的古地表。至少发现了两次荒芜的林地，均被爆炸性火山作用终止。结果，倒下的树木和树桩立即被大量的灰烬覆盖，这有利于快速硅化。丰富的南洋杉周围的种子锥表明，奥劳里亚林地产生了这种类型的圆锥体。古生态学，沉积学和古气候数据被用来更好地了解侏罗纪树木植被保存得最好的例子之一的生活史。在侏罗纪和早白垩世的大部分时间里，araucarian树与checheolepidaceous针叶树的持续联系表明，巴塔哥尼亚的景观被开阔的林地或更近的森林覆盖，成为主要的植物形成。