Sr-isotope data and possible stratigraphic ages derived from the LOWESS 5.0 curve [52].

‘age 1’ are the ages that fall within the biostratigraphically possible age range, as also shown on Figure 4.
Sr-isotope data and possible stratigraphic ages derived from the LOWESS 5.0 curve [52].

'age 1'指处于生物地层学可行年龄区间内的年龄值，该区间亦如图4所示。
锶同位素（Sr-isotope）数据与通过LOWESS 5.0曲线[52]推导得到的潜在地层年龄。