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粤中广九铁路南段东莞樟木头至深圳特区沿线出露一套灰、灰绿、紫红色砂泥岩及页岩,谢家荣等(1928)名为李朗组,划归中及上侏罗统;广东省地质局区测队(1962)命名这套地层为“塘厦群”,划归下白垩统;后来,中南区域地层表编写组(1974)和南颐等(1978)改称为中、上侏罗统百足山群;但宜昌地矿所等(1979)仍沿用广东区测队的意见,并进而认为“塘厦群”是粤中石鼓盆地的红层。
A set of gray, gray-green and mauve sand-shale and shale are exposed along the southern Zhangguotou-Shenzhen Special Economic Zone in Guangdong to Guangdong-Kowloon Railway. The Xielang-rong et al. (1928) is called the Lilang Formation and is classified as Middle and Upper Jurassic. The Geological Survey of Guangdong Province (1962) named this formation “Tangxia Group” and classified it under the Cretaceous. Later, the South-Central Asia Formation Formation Group (1974) and Nan Yi (1978) Jurassic Hundred Foot Mountain Group; however, Yichang Institute of Geology and Mineral Resources (1979) still followed the opinion of Guangdong Team and further thought that “Tangxia Group” is the red layer of the Shensi Basin in Guangdong.