Fig. 1From: Early Pliocene otolith assemblages from the outer-shelf environment reveal the establishment of mesopelagic fish fauna over 3 million years ago in southwestern TaiwanMaps showing the sampling sites. a Overview of geological map of Taiwan (modified after Chen, 2016). b Detailed geological map of study area (map extracted from National Geological Data Warehouse, Central Geological Survey, Ministry of Economic Affairs, Taiwan). c–d Detail maps of the sampling sites in Chochen, Tainan (c) and Tianliao, Kaohsiung (d)Back to article page