Erosion Cliffs Ault 1911-2022 | Falaise #154 | 20230814 | Michel van der Burg | 1-memo•com | Chalk cliffs erosion past 100 years at the seafront of cliff town Ault (Picardy) on the Alabaster coast in France. Postcard (marked 1911) from Editeur Lèvêque in Ault | Wikimedia Commons – compared with aerial drone recording at 9 AM on April 2, 2022 (showing recent repair works), on the Alabaster coast at the cliffs of Ault, France (with image distortion used to mimic the postcard perspective). TakeNode e14d8dbe-bdad-4ed1-9d16-27d52f30c6fc
Seven Sisters | Falaise #153 | 20230813 | Michel van der Burg | 1-memo•com | The geological timeline is evident rising along the steep ca 60 meters high chalk cliffs of Ault, with horizontal dark bands of flint (hard rock) in the soft chalk rock of the cliffs. The Seven sisters flint band, which characterizes the transition between Middle and Upper Coniacian, is near the top of the cliffs. Aerial drone recording at 9 AM on April 2, 2022, on the Alabaster coast at the cliffs of Ault, France. | TakeNode 47411fe2-7cae-4853-8dee-ee6ebf695dbf
The Seven Sister were described April 2023 by Nelson Pain :
“The cliffs that surround Ault beach are made up of chalk from the Upper Cretaceous, more precisely from the terminal Turonian and Coniacian (about 83 Ma to 90 Ma). They are dotted with nodules of flint which underline the sub-horizontal stratification planes … The relative proportion between chalk and flint is approximately 90-95% chalk to 5-10% flint.
Flint horizons are stratigraphic markers. On the cliffs around Ault, the regular band of flint named Seven Sisters is recognizable and characterizes the boundary between the Middle Coniacian and the Upper Coniacian (about 87 Ma). The boundary between Lower and Middle Coniacian is marked by the marly Shoreham 2 level, which is more difficult to identify. These lithostratigraphic markers allow in particular the correlation of distant deposits, such as between the Normandy and Picardy coasts, or even between the French and English coasts.”
Fauna | Falaise #114 | 20230609 | Michel van der Burg | 1-memo•com | Foreshore (French : estran) of the chalk cliffs of Mers-les-Bains (Hauts-de-France), on the border of Normandy, with Le Tréport village at the end of this film, France, March 2022 | TakeNode ca8183c6-5491-40b1-8acf-16dd81194005
Rock | Falaise #113 | 20230608 | Michel van der Burg | 1-memo•com | Rocky flats of the foreshore (French : estran) of the chalk cliffs of Mers-les-Bains (Hauts-de-France), on the border of Normandy, France, March 2022 | TakeNode af52e15b-ce96-44f9-8595-68ce17ff522d
Foreshore Falaise Mers-les-Bains | Falaise #112 | 20230607 | Michel van der Burg | 1-memo•com | Rocky flats of the foreshore (French : estran) of the chalk cliffs of Mers-les-Bains (Hauts-de-France), on the border of Normandy, France, March 2022 | TakeNode b7f44024-f559-4c32-8e4d-cfb53c47c75c
Foreshore Mers-les-Bains | Falaise #111 | 20230606 | Michel van der Burg | 1-memo•com | Foreshore chalk cliffs of Mers-les-Bains, right at the border between Picardy and Normandy, France, March 2022 | TakeNode 7a475f12-6e3f-4872-ba55-297eb81088cf
Panaroma Mers-les-Bains | Falaise #110 | 20230605 | Michel van der Burg | 1-memo•com | Panaroma of the sea front and cliffs of Mers-les-Bains, right at the border between Picardy and Normandy, France, March 2022 | TakeNode 8c5dd8de-8e84-423e-9980-b62ed8cd9667
