Northern Oman was obducted by allochthonous rocks, including the Semail Ophiolite, during the Cretaceous, which generally hampers field investigations on autochthonous rocks. However, central parts of the Jabal Akhdar Dome provide insights into sub-allochthonous deformation patterns from northern Oman because autochthonous Arabian rocks are exposed. Field survey and satellite image analysis reveal triple-folded autochthonous Neoproterozoic rocks. In the Neoproterozoic succession, carbonates are more resistant to erosion than the under- and overlaying siliciclastics and shape present-day morphology in the superbly exposed surface of the Hat Plateau, where anticlines and synclines coincide with ridges and troughs, respectively.

Previously unrecognized F1 folds are NNE-verging, overturned and tight with amplitudes of 10–100 s of meters, have ESE-oriented fold axes, and display a gently to moderately SSW-dipping penetrative axial-plane cleavage. F1 structures are re-folded by open-tight upright kilometric F2 folds, with NE/NNE-oriented fold axes and a penetrative NE/NNE-striking sub-vertical axial-plane cleavage. A younger ∼WNW-trending broad anticline (F3) exhibits a widely spaced sub-vertical ESE-striking axial-plane cleavage.

The F2 deformation style is heterogeneous. In the West, the NE/ENE-oriented F2 folds are ∼3 km in amplitude and gently plunging. In the East, the NNE-oriented folds are <1 km in amplitude and non-plunging. The change ensues abruptly along a NNE-oriented zone at the western end of the Hat Plateau. The pre-existing NNE-oriented western flank of the Makarem-Mabrouk High/Horst in the subsurface controlled this change, exerting a buttressing effect with less deformation in the East.

阿曼北部在白垩纪期间被包括 Semail 蛇绿岩在内的外来岩石包围，这通常阻碍了对本土岩石的实地调查。然而，Jabal Akhdar Dome 的中心部分提供了对阿曼北部亚异地变形模式的洞察，因为阿拉伯本土岩石暴露在外。实地调查和卫星图像分析揭示了三重折叠的原生新元古代岩石。在新元古代序列中，碳酸盐岩比下层和上层的硅质碎屑岩更能抵抗侵蚀，并在哈特高原极好的暴露表面形成现代形态，背斜和向斜分别与脊和槽重合。

以前未被识别的 F1 褶皱是 NNE 边缘的，翻转和紧密，振幅为 10-100 s 米，具有面向 ESE 的褶皱轴，并显示出温和到适度的 SSW 倾斜的穿透轴向平面解理。F1 结构通过开放紧密的直立千米 F2 折叠重新折叠，具有 NE/NNE 取向的折叠轴和穿透性 NE/NNE 引人注目的亚垂直轴平面解理。较年轻的~WNW 趋势宽背斜（F3）表现出广泛间隔的亚垂直 ESE 走向轴向平面解理。

F2 变形风格是异构的。在西部，面向 NE/ENE 的 F2 褶皱的幅度约为 3 公里，并轻轻下沉。在东部，NNE 取向的褶皱幅度小于 1 公里，并且没有下沉。这种变化沿着哈特高原西端的 NNE 导向带突然发生。地下 Makarem-Mabrouk High/Horst 的预先存在的 NNE 向西侧控制了这种变化，在东部产生较小变形的支撑作用。