The identification of growth lines in abalone shell using a nuclear microprobe

Determining age and growth of abalone using stable oxygen isotopes: a tool for fisheries management

“…In instances where the shell is laid down in isotopic equilibrium with the seawater, the conversion of stable oxygen isotope ratios to seawater temperature is possible. X-ray diffraction showed the presence of both calcite and aragonite in samples from the prismatic layer as found by Bettiol et al (1999). To investigate whether the shell was laid down at, or near to, isotopic equilibrium with the seawater, equations for both forms of calcium carbonate were used.…”