Table 2: Periods of spectral maxima (year) for the five series used here.

238U	232Th	δ234U	230Th/238U	230 Th/232Th
7400	5500	7400	4400	4400
2300	2600	2600	2000	1930
700	1430	1400	600	700
330	600	900	240	600
200	360	350	150	240
130	150	250	130	150
94	135	180	120	135
83	83	130	110	68
67	76	104	90
		67	80

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Written: 12.7.20     Last Updated: 12.7.20