This week's Friday Field Photo is from Eocene Grès d'Annot Formation exposed in the mountains of southeastern France. The upper part of the bed displays some attractive convolute lamination. Originally horizontal structures were deformed in a "soft" way very soon after deposition (while still a mixture of sediment and water). This structure is very common in sediments that were deposited in deep-sea environments.
This region of the French Alps and this formation is where Arnold Bouma did his dissertation work in the late 1950s-early 1960s, which led to a sedimentary sequence being named after him.
Happy Friday!
