Inverse magnetic fabrics defined by anisotropy of magnetic susceptibility with the longest principal axis perpendicular to bedding were identified in the studied samples of Ordovician sedimentary rocks from the Barrandian area, Czech Republic. These fabrics are related to ankerite fibers in association with cone‐in‐cone structures. To understand the meaning of such inverse magnetic fabrics for geological interpretations, a new, more detailed classification of inverse magnetic fabrics' types is formulated in this paper. Distinguishing the structural (i.e., shape) and magnetocrystalline anisotropies in rocks, three new (sub)types of magnetic fabrics were defined in this study based on the combination of structural normal/inverse and magnetocrystalline normal/inverse anisotropies. As a result, normal magnetic fabric is extended by new fabric types associated with inverse anisotropy: simple inverse, pure inverse, and pseudo‐normal magnetic fabrics. The studied fibrous ankerite shows simple inverse magnetic fabric, which results from the combination of normal magnetocrystalline and inverse structural anisotropies.

中文翻译：

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岩石的磁各向异性：逆磁布的新分类，有助于地质解释

在捷克共和国Barrandian地区的奥陶纪沉积岩样本中，确定了由磁化率各向异性定义的反磁性布，最长的主轴垂直于地层。这些织物与圆锥形圆锥结构相关的铁矾石纤维有关。为了理解这种反磁性织物在地质解释中的含义，本文提出了一种新的，更详细的反磁性织物类型分类。区分岩石中的结构（即形状）和磁晶各向异性，本研究基于结构法向/反向和磁晶法向/各向异性的组合定义了三种新型（子）磁性织物。结果是，常规磁性结构被与各向异性相反的新结构类型扩展：简单的逆，纯逆和伪正态磁性结构。所研究的纤维状铁矾土显示出简单的逆磁性结构，这是由正常的磁晶和逆结构各向异性共同产生的。