中国浙江新昌化石木研究

本文介绍了发现于中国东南沿海地区浙江省新昌县中生代地层中的一种化石木新种———新昌南洋杉型木 (AraucarioxylonxinchangenseDuansp .nov .)。这种化石木保存在早白垩世馆头组中、下部的紫红色泥砂岩中 ,分布在新昌县城西部 ,南北绵延 2 5公里、东西宽约 2公里的狭长地区。由于在化石木产区曾发现过多种植物化石 ,因而确定了该区在早白垩世时期处于我国的欧洲 中国植物区内 ,属亚热带 热带气候区 ,种种迹象表明此时气候有些干旱。同区发现的松柏目叶化石 ,其气孔构造与南洋杉科有一定的亲缘关系 ,这一点似乎与化石木之属可以对应。

Study on the Fossil Woods Found in Xinchang,Zhejiang Province, China

A new species of fossil wood Araucarioxylon xinchangense Duan sp.nov, was found in Xinchang, Zhejiang province, SE China and described in this paper. This species is identified from nearly twenty specimens from Jingling, Jingping and Suqin, west part of Xinchang, (nearly 25km x 2km ). Xinchang County belongs to Shaoxing City. The strata of bearing fossil woods are Guantou Formation, which belongs to the Early Cretaceous in age. The authors described and discussed the characteristics of the new species. Interpret about the surroundings of the ancient forest at the Early Cretaceous in SE China, and how they could form the fossil woods in this area. We knew some fossil plant leaves from Suqin, identified some species of Pseudofrenelopsis and Pagiophyllum on the characteristics of the cuticular structure by Zhou and Cao. According to Seward (1904) Pagiophyllum may be related to Araucariaceae, therefore these fossil leaves may belong to the fossil woods. In the Early Cretaceous there were four plant floras: Siberia_Canadian Flora; European_Chinese Flora; Tropical and Australia Flora. In our country, NE China to Beijing area belong to the Siberia_Canadian Flora, From Shandong, SE China to Tibet area belong to the European_Chinese Flora. Many fossil plants were found in the same location with the fossil woods, therefore it could be made certain that Xinchang was in the European_Chinese Flora at that time. The climate was hot and somewhat dry, belonged to the subtropical to tropical zone.