This material was made from a fossil giant clam tridacna gigas of middle holocene age. Thus it contains information about water temperaturs of the past.
Mollusc collected from Kume Island in the central Ryukyu Island
Major component is Ca with 40 %m/m.
Mg/Ca-ratio of 1.3 mmol/mol (rounded values).
Sr/Ca-ratio of 1.7 mmol/mol (rounded values).
|original certificate of analysis||Link|