Emile Liteanu, 1965. "Contributions to the Study of Loess-Like Deposits in the Wallach Depression, Rumania1", International Studies on the Quaternary: Papers Prepared on the Occasion of the VII Congress of the International Association for Quaternary Research Boulder, Colorado, 1965, H. E. Wright, Jr., David G. Frey
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In the Wallach Depression the interfluvial plains, terraces, large alluvial fans, and even the alluvial plains (except for the modern floodplains) are covered by loessic sediments which have characteristic lithologic features in different morphological-structural units.
Thus in the central part of the Eastern region, loessic sands of alluvial origin predominate. In the northeastern part the eolian relief indicates that the fine-sandy loess-like deposits are related to wind action. In the southern part the silty loess-like deposits of the hilly land and the Danube valley have a colluvial and alluvial origin, as do the clayey loess-like deposits of the entire Getique (western) region.
On the basis of lithologic, morphologic, and especially mineralogic evidence, I consider that the distribution and age of the volcanic-ash lenses interbedded in the loess-like deposits opposes an eolian origin for these deposits.