Age control of sediment core GIK17050-1

Abudant ice rafted debris between 345-392 cm; d18O/d13C minimum at 465cm is expected to correlete with laminated layers at 226-270 cm in 17049-6在345~392厘米层段内发育大量冰筏碎屑（ice rafted debris）；预计样品17049-6中，465厘米处的δ18O/δ13C最小值与226~270厘米层段的纹层（laminated layers）存在相关性。