region               site                    lat      lon       core_id          calcification  density  boring_pcent  
American_Samoa       Rose_Atoll              -14.545  -168.171  ROS01_#1         1.18           1.25     0.00          
American_Samoa       Rose_Atoll              -14.545  -168.171  ROS02_#2         0.85           1.13     0.00          
American_Samoa       Rose_Atoll              -14.545  -168.171  ROS03_#3         1.04           1.38     0.00          
American_Samoa       Rose_Atoll              -14.545  -168.171  ROS04_#4         nd             1.54     0.00