An Outline of Chinese Geology

To the south of the Tsing-ling Range the above classification of the Sinian System no longer holds good. The Kisinling Limestone of western Hu-peh—a massive grey limestone grading downwards into a slaty limestone and slates—has yielded in its upper part gigantic Orthoceras, or the pagoda stone, and other Ordovician fossils; and is therefore regarded as equivalent to the upper and the middle part of the Sinian in north-east China. Unconformably underlying the Kisinling Limestone, a glacial deposit, the Nantou Tillite, was found by Willis and Blackwelder at Nan-tou, near the north-western entrance of the I-chang Gorge (about long. 111° 10′ E., lat. 30° 45′ N.). Mr. V. K. Ting has verbally informed the writer that this interesting deposit extends towards the south-west for a considerable distance. The occurrence of Asaphus and Trinucleus to the south of Ning-kiang (about long. 106° E., lat. 32° 45′ N.) makes it highly probable that, there, the upper Sinian is exposed among other folded Palæozoic strata.