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昌台地区位于四川西部金沙江东岸的白玉县境内。这里的地质构造复杂,岩石均遭受了不同程度的变形和变质,沉积相标志保存不好,生物的实体化石分布比较局限。因此, 地层划分和沉积环境分析都比较困难。1986年笔者在昌台一带的晚三叠世地层中发现了较丰富的遗迹化石。1983年四川省地矿局科研所侯立玮等在昌台北边的呷村也曾采到少数遗迹化石。由于本区劈理十分发育,因此不少遗迹化石被破坏成碎片。经鉴定,保存较好的化石有5个遗迹种(其中包括2个旧种和3个未定种),分属4个遗迹属。这些遗迹化石的发现为本区沉积环境的分析提供了较为有意义的证据,弥补了某些实体化石分布上的不足。
Changtai region is located in western Sichuan Jinsha River east of Baiyu County. The geological structure here is complicated, the rocks are subjected to different degrees of deformation and metamorphism, the sedimentary facies signs are not preserved well, and the distribution of living entity fossils is relatively limited. Therefore, stratigraphic division and sedimentary environment analysis are more difficult. In 1986, the author found abundant trace fossils in the Late Triassic strata in Changtai. In 1983, Sichuan Provincial Bureau of Geology and Mineral Resources and other research institute Hou Liwei in the northern part of Changtai also had a small collection of fossils. Because of the development of cleavage in this area, many fossils have been destroyed into fragments. Identified, there are 5 well-preserved fossil species (including 2 old species and 3 undetermined species), belonging to 4 remains. The discovery of these trace fossils provides more meaningful evidence for the analysis of the sedimentary environment in the area and makes up for the deficiencies in the distribution of some solid fossils.