International Journal of Oceanography

Research Article

Eocene (Lutetian) Shark-Rich Coastal Paleoenvironments of the Southern North Sea Basin in Europe: Biodiversity of the Marine Fürstenau Formation Including Early White and Megatooth Sharks

Table 1

Dalum gravel analysis based on 3,927 pebbles (>4 mm).
AgeRock typeNumber of clasts
Paleogene (Early/Middle Eocene)Phosphorite concretions600
Phosphorite burrows1
Phosphorite fossils1
Fine-grained white sandstone10
Vertebrate remains (mainly shark teeth)150
Upper Cretaceous (Campanian-Maastrichtian)Flint10
Lower Cretaceous (Valanginian-Hauterivian)Iron-carbonate concretion: rock fragments980
Iron-carbonate concretion: burrows50
Iron-carbonate concretion: ammonite fragments10
Jurassic (Bathonian-Kimmeridgian)Oolitic iron ores1
Oolitic carbonates1
Silica-iron-carbonate concretions1
Carboniferous (Westphalian C-D)Quartzite2,100
Quartzite conglomerates10
DevonianBlack lydite1
Volcanic rocks (age unclear)Red volcanic rocks1