Volume 1

France / by D.H. Darby.

  • Great Britain. Naval Intelligence Division.
Date:
1942
Catalogue details

Licence: Public Domain Mark

Credit: France / by D.H. Darby. Source: Wellcome Collection.

    41/336 (page 23)
    similar surface conditions east of the Moselle between Nancy and Metz. These great clay formations constitute vales, etched by river erosion between the limestone escarpments (Fig. 21). It should be noted that over all the limestone country, and particularly in the chalk areas, long-continued weathering has left residual clays on parts of the surface, e.g. the ‘clay-with-flints’ on Coy a) ag, é oN a “Bony, ae sa a Distribution of limon & associated deposits. Fig. 10. The distribution of limon and associated deposits Based on the Atlas de France, plate 10 (1938). the chalk. These hold up surface water and give rise to soils almost as wet, cold and intractable as those of the great clay formations. Superficial Deposits include (1) residual clays on the limestones, (2) river alluvium, (3) terrace gravels, and (4) limon. This last deposit forms a very important feature (Fig. 10), and is a fine-grained loam of yellow or brown colour. ‘There can be little doubt that in most areas it originated as a wind-blown dust in phases of steppe climate