The late Pliensbachian–early Toarcian δ¹³C_org in the Mochras Core (UK) consists of segments (rising and falling limbs, valleys, plateaus) that correlate to coeval segments in Europe and America. The Mochras global δ¹³C_org segments were dated with cyclostratigraphic analysis and U-Pb dating and found to be anti-correlated to eustatic cycles and model cycles predicted by the orbital scale of glacio-eustasy. In the interval 188–181 Ma five lowstands correlate to minor (<25 m), medium (25–75 m) or major (>75 m) global sequence boundaries (SB): minor early margaritatus SB JPl6 (187.89 Ma); major late margaritatus SB JPl7 (186.27 Ma); medium spinatum SB JPl8 (184.24 Ma); medium tenuicostatum SB JTo1 (183.03 Ma); and medium serpentinum SB JTo2 (182.22 Ma). Minor SBs correlate to small δ¹³C_org positive spikes without apparent hiatus. Medium and major SBs correlate to positive δ¹³C_org jumps (unconformity), or occur in rising limbs and plateaus. Maximum flooding surfaces follow SBs by >0.4 Myr at the intersection of δ¹³C_org falling limbs and valleys. The δ¹³C_org segments and correlative cycles are tuned to the 0.405 Myr eccentricity cycle and its multiples, implying orbital-forcing of insolation synchronized glacio-eustatic, climate and carbon cycles and modulated the atmospheric CO₂ levels during glacial-interglacial intervals. Orbitally paced changes in the Earth's cryosphere, climate and carbon cycle are therefore considered a major driver of late Pliensbachian-early Toarcian environmental instabilities and perturbations.

Mochras 核心（英国）中的晚期 Pliensbachian - 早期 Toarcian δ ¹³ C_组织由与欧洲和美国的同时期段相关的段（上升和下降的肢体、山谷、高原）组成。Mochras 全球 δ ¹³ C_组织段通过旋回地层分析和 U-Pb 定年进行了测年，发现与冰川 - eustasy 轨道尺度预测的浮空循环和模型循环反相关。在 188-181 Ma 区间，五个低位与次要 (<25 m)、中 (25-75 m) 或主要 (>75 m) 全球层序边界 (SB) 相关：次要早期margaritatus SB JPl6 (187.89 Ma)；主要晚玛格丽塔鱼 SB JPl7 (186.27 Ma)；中棘SB JPl8 (184.24 Ma); 中等细条木SB JTo1 (183.03 Ma); 和中等蛇纹石SB JTo2 (182.22 Ma)。次要 SB 与没有明显中断的小 δ ¹³ C _org阳性尖峰相关。中等和主要 SB 与正 δ ¹³ C_组织跳跃（不整合）相关，或发生在上升的肢体和高原。在 δ ¹³ C _org下落支部和山谷的交汇处，最大洪水面跟随 SBs > 0.4 Myr 。δ ¹³ C_组织段和相关循环被调整到 0.405 Myr 偏心率循环及其倍数，这意味着太阳光同步的冰川 - 静水、气候和碳循环的轨道强迫，并在冰川 - 间冰期间隔期间调节了大气 CO ₂水平。因此，地球冰冻圈、气候和碳循环的轨道节奏变化被认为是晚期 Pliensbachian-早期 Toarcian 环境不稳定和扰动的主要驱动因素。