The Brabant Island Tectonic Block includes up to 2000 m of basaltic-andesitic lavas and volcaniclastics, possibly corresponding to the Lower Cretaceous Antarctic Peninsula Volcanic Group of the Danco Coast. This group is intruded by a granodiorite sill and Early Eocene hypabyssal dykes. Late Tertiary to Pleistocene basaltic lavas uncomformably overlay this complex.[3]