Simplified geological map of the south of the "département d'Indre-et-Loire"
Simplified geological map (north) Map of the "département d'Indre-et-Loire"
Warnings :
This simplified geological map was realized with the help of the geological maps (1/50 000) of the "Bureau de Recherches Géologiques et Minières" (BRGM), by consultation of the server InfoTerre.
The purpose of this simplified map is to present a general view of the geology of Touraine. For very precise details of a part of the covered zone, you will have to obtain the corresponding geological map or consult the server InfoTerre. I stopped in the limits of Indre-et-Loire, which correspond about to those of Touraine.
For concerns of legibility, I grouped together the 3 elements of Turonian (clayey chalk, micaceous chalk and yellow tuffeau) into a single color. More often than not, the outcrops of Turonian are limited to the top of the formation.
I also grouped together the chalk of Villedieu and the white chalk with flint (chalk of Blois) in calcareous Senonian, that I distinguished from clayey-siliceous formations of Senonian.
Some outcrops of Miocene faluns were not drawn because of their small size.
I grouped together the modern, recent and ancient alluviums. Many terraces of ancient alluviums were not drawn because of their weak area.
I also chose not to copy over this map silts of plateaus and wind sands which cover nevertheless a big part of Touraine. These superficial formations present a very weak thickness (some metres at most).
The colluviums of hillsides and bottoms of small valleys were also omitted.
Finally, the faults were not represented.
The natural context Touraine's Depths From Oxfordian to lower Cretaceous In Cenomanian In Turonian In Senonian In Paleogene In Neogene In Quaternary Map of Indre-et-Loire Simplified geological map (north) Simplified geological map (south)