Periglacial paleohydrologies reconstituted from sandstone morphologies
A model for groundwater silicification within the Fontainebleau Sands in sub contemporary landscapes was first proposed 35 years ago and has now been substantially updated with reference to silica precipitation during periglacial climate conditions. Herein we focus on observations that point to a de...
Main Authors: | , , |
---|---|
Other Authors: | , , , , |
Format: | Other/Unknown Material |
Language: | English |
Published: |
HAL CCSD
2024
|
Subjects: | |
Online Access: | https://hal.science/hal-04545306 https://hal.science/hal-04545306/document https://hal.science/hal-04545306/file/Thiry%26al_2024_Permafrost_Paleohydrology_Sable_Fontainebleau_field-trip_AstroGeo_240411.pdf |
Summary: | A model for groundwater silicification within the Fontainebleau Sands in sub contemporary landscapes was first proposed 35 years ago and has now been substantially updated with reference to silica precipitation during periglacial climate conditions. Herein we focus on observations that point to a deep permafrost which controlled the hydrology of paleolandscapes in the Paris Basin during Quaternary glaciations. A model for groundwater silicification within the Fontainebleau Sands in sub contemporary landscapes was first proposed 35 years ago and has now been substantially updated with reference to silica precipitation during periglacial climate conditions. Herein we focus on observations that point to a deep permafrost which controlled the hydrology of paleolandscapes in the Paris Basin during Quaternary glaciations. Le modèle d’une silicification de nappe, liée aux paysages subactuels, proposé il y a 35 ans, a été précisé et complété avec l’introduction des climats périglaciaires qui expliquent la précipitation de la silice. Ici nous présentons les observations qui étayent la présence d’un pergélisol (ou permafrost) profond dans le bassin de Paris pendant les glaciations quaternaires et qui permettent de remontrer à l’hydrologie de ces paléopaysages. |
---|