erratic

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He covers how erratic blocks caught the eye of science, glacier advances and icy theories 1810-1830, glacier and ice-age theories in the first half of the 1830s, the international reception of glacial theory, and the search for causes of the ice ages.
Glacial erratic blocks and glaciodislocations of the north-western part of the Russian Plain.
The systemic irreconcilability of the various political, economic, and social realities took the form of cast organs, which were like erratic blocks within the interior of the space.