【摘要】 世界中生代木化石大多集中于侏罗纪和白垩纪,三迭纪的木化石则较少见,我国的情况亦是如此。迄今为止,经正式报道的中生代木化石几乎全是侏罗纪和白垩纪的。因此,三迭纪木化石的发现和研究无论在古生物学还是地层学上都具有比较重要的意义。本文所研究的木化石采自广东北部乐昌县关春地区坪石-矿及附近小煤窑的矸子堆上。该矿及附近小煤窑所开采的煤层均属晚三迭世艮口群下部的红卫坑组,其时代可能相当于诺利-瑞替期,即晚三迭世中-晚期。木化石的矿物成分经初步鉴定,主要为碳酸盐(菱铁矿),用浓盐酸可以腐蚀,因此可以象煤核一样用揭膜法进行研究。更多还原

【Abstract】 Xenoxylon ellipticum has been found in Hongweikeng Formation (probably Middle Keu-per -Rhoetic), Gengkou Group of the Late Triassic from fhe North of Guangdong Province and is described in this paper. The species was first found in the Early Jurassic from West Germany in 1960. It is the fifth species of Xenoxylon Gothan ever found in China.更多还原