This superb Ludwigia has been preserved in the lowest part of the Murchisonae Zone and pockets of matrix are very dark in colour but only occasionally contain any ammonites these are called 'Black Blocks'. There are also another two small ammonites (Graphoceras cf castum) and a Bivalve Shell (Pleuromya cf uniformis) on the same matrix next to the large ammonite. These dark coloured Ludwigia's are very rare and this example will make a wonderful display fossil. An anti-slip and scratch pad has been attached to the flat base of the rock to protect furniture or shiny floors to scratching. Approximately 175 million years old.