Ref. 2421: One kilometre further south of the MM1 site, the lowermost Sinemurian bioclastic limestones are unconformably overlain by an upper Bathonian, 1-m-thick bed of pure micritic bearing Stromatactis-like features, and capped by large oncolites (referred to as 'Snuff boxes'- Elmi, 1990) , in addition to brachiopods and belemnite rostra. This bed is interpreted as a low-relief mud-mound deposited on the Middle Jurassic depositional slope in quite deep-water environments. 
