In the Central Iberian Zone, the Cadomian orogenic collapse is represented by chaotic megabreccias, olistostromes and mélange deposits reflecting a drastic change from slope-related deposits, fed by denudation of the Cadomian arc, to offshore-dominant settings episodically punctuated by phosphogenetic processes. In the Ibor and Alcudia anticlines, the pre-rift unconformity is marked by paraconformable to angular discordant contacts separating variable tilted strata of the Ediacaran Lower Alcudian – Domo Extremeño Supergroup and the upper Ediacaran – lower Terreneuvian Ibor Group from the overlying Terreneuvian San Lorenzo and Fuentepizarra formations. The sedimentation of the San Lorenzo Formation reflects two palaeogeographic scenarios: (i) a low-angle stable basement recording shoaling-upward siliciclastic cycles, and (ii) perturbations of basement fault scarps feeding slope-related conglomeratic channels, with NE-directed palaeocurrents, and sourced from topographic palaeohighs controlled by the movement along synsedimentary normal fault systems, such as the so-called El Guijo Fault. The intra-Fortunian age of the pre-rift unconformity is constrained by the ichno- and microfossil content of the succession, and is bracketed between the first occurrence of Treptichnus pedum in the Arrocampo Formation (Ibor Group) and of Anabarella plana in the Fuentepizarra Formation.

在伊比利亚中部地区，卡多姆造山崩塌以混沌的巨型角砾岩、斜纹岩和混杂岩沉积物为代表，反映了从由卡多姆弧的剥蚀供给的与斜坡相关的沉积物到偶尔被磷生成过程打断的近海主导环境的剧烈变化。在 Ibor 和 Alcudia 背斜中，裂谷前不整合面的特征是与上覆的 Terreneuvian San Lorenzo 和 Fuentepizarra 的 Ediacaran Lower Alcudian – Domo Extremeño Supergroup 和上 Ediacaran – Lower Terreneuvian Ibor Group 的可变倾斜地层分离的斜向不整合接触。编队。圣洛伦佐组的沉积反映了两种古地理情景：（i）低角度稳定基底记录浅滩-向上的硅质碎屑旋回，(ii) 基底断层陡坡的扰动供给与斜坡相关的砾岩通道，具有 NE 方向的古洋流，并且源自受同沉积正断层系统运动控制的地形古隆起，例如所谓的 El Guijo 断层。裂谷前不整合的内部福尔图尼时代受到层序的 ichno- 和 microfossil 含量的限制，并且被括在第一次出现的Arrocampo组（Ibor 组）中的 Treptichnus pedum 和 Fuentepizarra 组中的Anabarella plana。