M. Bichler et al., DETERMINATION OF REE BY INAA IN CONODONT APATITE OF TRIASSIC AGE, Journal of radioanalytical and nuclear chemistry, 186(5), 1994, pp. 425-439
Instrumental neutron activation analysis is applied to determine REE i
n very small, toothlike elements of an extinct animal, the conodont. T
he results are useful to obtain records of local oceanic events and pr
ocesses connected to plate tectonics in the Tethys ocean from about 25
0 to 200 million years ago.