Last Updated: Version 9.0 (June 19, 2026)

**Geodynamic Reinterpretation Model for Ptolemy’s Germania Magna (Full-Text):** General Model Description, Cartometric Foundations, Extended Evidence Analysis, and Impact Hypothesis

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Mildner, S. (2026). Geodynamic Reinterpretation Model for Ptolemy’s Germania Magna: General Model Description, Cartometric Foundations, Extended Evidence Analysis, and Impact Hypothesis. EarthArXiv (Preprint). https://doi.org/10.31223/X5KB51
([📥 **Download v9.0-PDF**)](https://zenodo.org/records/20758648/files/Geodynamic_Model_Description_for_Ptolemys_Germania_Magna___eartharxiv__c9.0.pdf?download=1)

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**Builds upon:** Mildner, S. (2025/2026). *A new interpretation of Ptolemy's Germania Magna: Employing computer-assisted image distortion of a medieval map by Donnus Nicolaus Germanus to examine post-glacial geodynamics in Europe*. EarthArXiv. https://doi.org/10.31223/X5313T
([📥 **Download v5.0-PDF**](https://doi.org/10.31223/X5313T)) (descriptive main publication)

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***Disclaimer***

*This article presents an interdisciplinary working hypothesis that integrates cartometry, geodynamics, sedimentology, and historical sources. It proposes a geodynamic and climatic rupture in the 6th century AD and formulates concrete, falsifiable predictions. The model challenges aspects of the current mainstream interpretation and is intended to stimulate further empirical testing. It does not claim to be a definitive reconstruction.*

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by Sven Mildner, May 5, 2026
DOI: https://doi.org/10.31223/X5313T

In this draft of a new interpretation of Germania Magna, the author presents his hypothesis that Germania Magna underwent a far more extensive landscape transformation in geologically recent times than previously assumed. This was presumably caused by post-glacial isostatic rebound during the Holocene, or by a possible reactivation of the Caledonian Deformation Front (CDF) during a late phase of the Alpine orogeny, along with the associated tectonic activity in the upper crust (see following section). There is also the consideration whether a cosmic impact event could have been the cause of such a reactivation of the CDF. The conditions that would be expected in order to sufficiently substantiate the process described below would probably also involve previously misattributed or incorrectly dated major fault events. These could have repeatedly triggered stronger earthquakes in Central Europe over several centuries and may even have been recorded in written sources from the later Middle Ages.[1]

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**Scientific analysis based on the primary source:** Mildner, S. (2025/2026). *A new interpretation of Ptolemy's Germania Magna: Employing computer-assisted image distortion of a medieval map by Donnus Nicolaus Germanus to examine post-glacial geodynamics in Europe*. EarthArXiv (Preprint). https://doi.org/10.31223/X5313T
([📥 **Download v5.0-PDF**](https://doi.org/10.31223/X5313T))

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Last updated: to Version v6 (May 24, 2026)
([📥 **Download NEW-v9.0-PDF**](https://zenodo.org/records/20758648/files/Geodynamic_Model_Description_for_Ptolemys_Germania_Magna___eartharxiv__c9.0.pdf?download=1)) 

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The historical geography of Germania Magna remains one of the most challenging fields in classical studies and geodetic research. The currently paradigmatically influential reference model — the statistical-geodetic rectification of the TU Berlin group (Karlsen et al., 2011) — explains deviations between Ptolemaic coordinates and modern topography primarily as measurement errors of ancient instruments or as transmission artefacts.

The present model is based on a fundamentally opposing assumption. The primary explanatory principle is the recognition that the northern reference coastline of the Oceanus Germanicus lay approximately 120 km further south in antiquity. Medieval cartographers projected Ptolemy’s coordinates onto a landscape already altered by major 6th-century geodynamic processes. This produced a systematic northward stretching of the map image and a corresponding eastward displacement of eastern coordinates.

The cartometric foundation — a strictly affine transformation anchored on the invariant Rhine–Elbe baseline with a global scaling factor of ≈28 km per Ptolemaic degree of longitude — remains unchanged. The statistically irrefutable −93.1 km eastward displacement of the Elster Cluster is the empirical core result.

This four-part publication series presents Mildner’s Geodynamic Reinterpretation Model at increasing levels of mathematical and geophysical depth. Part 1 (this document) provides the general conceptual and interdisciplinary framework. Parts 2–4 are companion documents and develop the cartometric, geophysical, and impact-mechanical foundations in quantitative detail.

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**Scientific analysis based on the primary source:** Mildner, S. (2026). *Geodynamic Reinterpretation Model for Ptolemy’s Germania Magna: General Model Description, Cartometric Foundations*, (v6). EarthArXiv (Preprint). https://doi.org/10.31223/X5KB51
([📥 **Download NEW-v9.0-PDF**](https://zenodo.org/records/20758648/files/Geodynamic_Model_Description_for_Ptolemys_Germania_Magna___eartharxiv__c9.0.pdf?download=1)) 

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Sven Mildner contends that the dramatic geodynamic and climatic rupture of 536 AD likely involved a reactivation of the ancient Caledonian Deformation Front (CDF) and the Trans-European Suture Zone (TESZ). He argues that large-scale inversion tectonics, fueled by Alpine compressive forces, reshaped Germania Magna during this period. With the Lausitz Block anchoring these stresses, neighboring massifs like the Harz and Thuringian Forest underwent significant rotation and deformation. The consequences were environmental and societal collapse: catastrophic floods, firestorms, and the formation of the 'Event-Dark-Earth' (ED-E) layer, alongside a major regression of the North Sea. This transformation explains why the ancient, compact shape of Germania Magna vanished, leading to the abrupt end of its settlement history.