Hard rocks or crystalline rocks (ie, plutonic and metamorphic rocks) constitute the basement
of all continents, and are particularly exposed at the surface in the large shields of Africa …

Terra Nova, 23, 145–161, 2011 Abstract The hydrogeology of superficial (∼ 0–100 m bgl)
Hard Rock Aquifers (HRA; ie plutonic and metamorphic rocks) has so far been dominated by …

During the early Cretaceous, successive tectonic phases and several sea level falls resulted
in the emersion of the main part of western Europe and the development of thick “lateritic” …

Laterites are regoliths developed under tropical to subtropical conditions and are host to key
deposit types, notably bauxites (major sources of Al, derived from weathering of …

Abstract In 2013, Andra (French National Radioactive Waste Management Agency) drilled
boreholes to the south-east of the Paris Basin, to characterise Aptian and Albian clayey …

High-resolution clay mineral analyses were performed on lower and middle Albian deposits
from the Paris and Vocontian basins in order to specify the weathering conditions that …

Abstract The Armorican Massif, an extensive outcrop of Variscan basement in western
France, is shaped by several planation surfaces of debated origin and age. We propose an …

Most hard rocks are or were exposed to deep weathering processes, as in large shields of
Africa, India, North and South America, Australia and Europe. It turns out that the hydraulic …

Low-temperature thermochronology data have been acquired from outcrop samples from
the southeastern edge of the Paris Basin (Morvan). They provide indications about the …

ABSTRACT The IAH Commission on Hardrock Hydrogeology (HyRoC) became a significant
feature of the International Association of Hyrogeologists since the early 1990s. It has …