Extended Data Fig. 2: Plan view and stratigraphy of the Guanyindong Cave.
From: Late Middle Pleistocene Levallois stone-tool technology in southwest China
a, Plan view of the cave, main excavation area and the residual profiles from the south wall. The blue dots and the numbers next to each of the dots represent the locations of U-series dating samples have been taken previously17 (see Supplementary Information for discussion of the U-series results); sample codes from 1 to 8 are QGC-19-1, QGC-19-2, QGC-4, QGC-21, QGB-4, QGC-7 and QGC-23, respectively. The green circles are the locations of profiles 1, 2a, 2b and 3. The red squares show the locations of the residual profiles S1 and S2, where the OSL samples were taken. b, Detail of the numbered stratigraphic layers at the main entrance of the cave. The stratigraphic layer numbers are shown in yellow circles. The red rectangles show the locations of the two south-wall sections (S1 and S2) where OSL samples were taken. The locations of OSL samples are shown in red circles, with the sample code shown inside (for example, number 1 represents GYD-OSL1; see Extended Data Figs. 3, 4 for more details). a, b, Images were adapted from a previous study16, copyright 1986.
