1. Introduction and fundamental reorientation of the discourse

The postglacial development of the Baltic Sea, particularly the transition from a lacustrine to a brackish-marine system, represents one of the most significant paleogeographic, paleoclimatological, and paleoecological transformations of the entire Holocene.1 The central chronostratigraphic event of this far-reaching development is the so-called Littorina Transgression. Triggered by the eustatic sea-level rise, which was primarily caused by the final melting of the large continental ice sheets of the Pleistocene (especially the Laurentide Ice Sheet), marine water masses flooded the topographic barriers of the Danish straits and penetrated deep into the hitherto largely freshwater-dominated Baltic Sea basin.1 This complex, multi-phase process profoundly changed not only the entire hydrographic system of the region but also completely reshaped the coastlines of Northern and Central Europe.1 

In the classical geoscientific paradigm, the course of this transgression is understood as a gradual process dominated by climatic and eustatic factors, which culminated in the early to middle Holocene – roughly between 8,500 and 4,000 years before present (cal. BP).8 After reaching the transgression and salinity maximum, according to the established doctrine, the system transitioned into a phase of relative stability or slight regression, driven primarily by the isostatic rebound of the Scandinavian landmass interacting with a decelerating eustatic rise.9  
Recent interdisciplinary research, specifically the detailed geodynamic, geochemical, and cartometric re-evaluation of the geographic data of Germania Magna transmitted by Claudius Ptolemy (c. 150 AD), now fundamentally challenges this paradigm of calm, fading coastal dynamics in the Late Holocene.\[13, 13\] The modeling of the ancient geographic coordinates based on a strictly affine transformation suggests that the coastline of the Oceanus Germanicus (the southern North and Baltic Sea) in late antiquity was located about 120 kilometers further south than it is today.\[13, 13\]  

If this interdisciplinary hypothesis proves true, it forces the scientific community to massively revise the current understanding of the exact course, duration, and above all, the definitive end of the Littorina Transgression. It implies that the transgression did not transition into a static Post-Littorina stage in the middle Holocene but continued continuously over millennia into the Roman Imperial Period, and was only abruptly ended in the 6th century AD by a catastrophic, primarily tectonically driven event.\[13, 13\] This report analyzes the empirical evidence of the classical model, systematically contrasts it with the new geodynamic findings, and evaluates the far-reaching implications for Quaternary geology, geoarchaeology, and the understanding of postglacial geodynamics in Europe.

Crustal Stress Fields, Translation-Glide Kinematics along the Zechstein Décollement, Biaxial Tension along the Bramsche–Český Kráter Axis, and the Herzberg Seismic Event of 2024

Last updated: to Version v6 (May 25, 2026)

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) 

Scientific supplementary analysis to:

> Mildner, S. (2026). Geodynamic Reinterpretation Model for Ptolemy's Germania Magna: General Model Description, Cartometric Foundations, Extended Evidence Analysis, and Impact Hypothesis (Version 6). EarthArXiv (Preprint). https://doi.org/10.31223/X5KB51

> 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

> Mildner, S. (2026). Mildner's Geodynamic Reinterpretation Model for Ptolemy's Historical Coordinates. ancientmaps-geography.com.

The reconstruction of the ancient geography of Germania and neighboring Sarmatia has always resembled a complex puzzle, in which the written records of classical antiquity are often difficult to reconcile with the physical realities of modern topography. One of the most fascinating questions in this context concerns the identity of the island of Scandia, which Claudius Ptolemy describes in his Geographike Hyphegesis as a significant island east of the Cimbrian Peninsula.¹ Parallel to this exists the deeply rooted legend of Vineta, a magnificent city sunk in the sea along the Baltic coast, whose historical core is most commonly assumed to lie in the region of Wollin or Usedom.² ³ The scholarly challenge is to examine whether Scandia and Vineta refer to the same geographical feature, merely named differently from distinct ethnic perspectives. A central hypothesis here is that the Sarmatian or Scythian peoples of the east called the island Vineta (or a precursor thereof) because of the Veneti who lived there, while the local population of western Germania Magna used the name Scandia.⁴

One of the most persistent puzzles in early Germanic history is how the island of Scandia (Scandza), described by Jordanes in his Getica as the vagina nationum — the “womb of nations” — could have generated enough demographic pressure to trigger large-scale migrations, including that of the Goths. Traditional scholarship has long identified Scandia with the vast Scandinavian Peninsula, a region so enormous that significant overpopulation and the resulting mass emigration appear highly implausible. However, when Scandia is reinterpreted as a much smaller, densely populated island in what is now Mecklenburg-Vorpommern, the narrative in Jordanes’ Getica suddenly gains compelling ecological and demographic logic. In this geographically compressed setting, rapid population growth could quickly reach a Malthusian tipping point, creating the very conditions of overcrowding and outward pressure that Jordanes describes. This reinterpretation transforms the Gothic migration from a seemingly mythical event into a plausible consequence of real demographic stress on a limited island territory.