Calcarious Concretions ( Septarian Nodules) 2
A very unusual accumulation of pebbles trapped within a septated calcarious nodule. The nodule was beach collected by Danny Hogben (2021) and is slightly wave damaged. The calcite infill of the nodule is quite plainly evident in the form of a yellowish band through the centre. The pebbles appear to be primarily decomposed flint. The broken pebbles are evidence of this. They were embedded within the septarian at the time of its formation during the deposition of the London clay 48 to 50 odd million years ago and considering the distance from land, and the relative depth of the sea at this time it is a remarkable occurence.
Above, as found/below after some prep work has been carried out