Table 1 Results obtained by different spectral analysis techniques on different proxies on the Steinbruch Schmidt section.

Spectral techniques	Record	Sed rate boundaries (cm/kyr)	Duration of whole record (kyr)	Sed rate (cm/kyr)	Duration of interval between LKW and F-F (kyr)	Difference with median (kyr)	Difference with ORTA MS (kyr)
eTimeOpt_Prec_SE	MS	0.1–0.55	1,062	0.50	694.0	11.0	16.0
eTimeOpt_SE_LE	MS	0.1–0.55	1,085	0.49	697.5	12.0	39.0
eTimeOpt_Prec_SE	LogTi	0.1–0.55	1,007	0.53	716.0	66.0	39.0
eTimeOpt_SE_LE	LogTi	0.1–0.55	1,124	0.47	812.0	51.0	78.0
eTimeOpt_Prec_SE	δ¹³C	0.1–0.55	1,129	0.47	708.0	56.0	83.0
eTimeOpt_SE_LE	δ¹³C	0.1–0.55	1,100	0.48	743.0	27.0	54.0
ORTA	MS		1,046	0.51	775.0	27.0	0.0
ORTA	LogTi		1,073	0.49	843.0	0.0	27.0
ORTA	δ¹³C		994	0.53	809.0	79.0	52.0

			Median	Median	Median	Average	Average
			1,073.0	0.49	743.00	36.6	43.1
		Standard deviation	47.31	0.02	56.14

Spectral techniques include eTimeOpt_Prec_SE, corresponding to the eTimeOpt technique focussing on the modulation of precession by short eccentricity; eTimeOpt_SE_LE, corresponding to the eTimeOpt technique focussing on the modulation of short eccentricity by long eccentricity and ORTA Optimized Relative Timing Approach. Records includes magnetic susceptibility (MS), Log Ti and Carbon isotopes (δ¹³C). Results are expressed as the duration of the whole record in kyr, sedimentation rate (SedRate in cm/kyr), duration of the interval between the onset of the Lower Kellwasser (LKW) Carbon isotopic excursion and Frasnian–Famennian (F–F) boundary; and difference with median value.

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