A photomicrograph dataset of mid-Cretaceous Langshan Formation from the northern Lhasa Terrane, Tibet

There are 3 kinds of data files in this dataset, which are: (1) polarized microscope image set (zip format) of rock thin sections, which contains 3 stratigraphic sections of 1134 thin section photos, with data amount of 24.9 GB; (2) measured stratigraphic columns (pdf format), showing lithology, thickness and age of three measured sections, with data volume of 431 KB; (3) thin section identification information table (excel format), including the basic information of 559 rock thin sections and microscopic characteristics and other identification results, with a data volume of 190 KB.