[2][3] The type section of the formation is found at the south of the costal Hasle Town, and it is composed by rusty yellow to brownish siltstones and very fine-grained sandstones.

[6] However, recent works have recovered terrestrial fauna from it, including a footprint, suggesting easterly winds and low tide could have exposed the inner parts of the upper shoreface, and create long-lasting Floodplain-type environments.

[7] Field works since 1984 have shown a mostly hummocky cross-stratified deposition, with great complexity of the sediments that suggests very complicated and variable flow conditions, with Megaripples derived from storm events.

[8] Storms were frequent and the coastline faced a wide epeiric sea with a fetch towards the west of possibly 1000 kilometers.

[8] The Jamesoni–Ibex Chronozone in the Central European Basin represents a clear sea Transgression, due to the appearance of ammonites from Thuringia and southern Lower Saxony, showing a full marine ingression towards the west.

[9] The whole Hasle Sandstones are a result of this rise in the sea level, where the marine sediments cover the deltaic layers of the Rønne Formation.

Found associated with Plicatula on long-term well-oxygenated conditions within the substrate and bottom waters.

It is found on small, smooth Clam associations, with the exception of one does section, with less well-preserved stone cores and imprints.

Identified originally as Ostrea semiplicata Gervilleia[12][13][14] A saltwater Oyster, member of the family Bakevelliidae inside Ostreida.

Found on a series of incomplete Stone Cores filled with specimens, that by Size and Form can be possibly attributable to Gervilleia aerosa.

Lima[12][13] A saltwater file Clam, type member of the family Limidae inside Pectinida.

Nuculana[12][13] A saltwater pointed nut Clam, type member of the family Nuculanidae inside Nuculida.

Palaeoneilo[12][13][14] A saltwater pointed nut Clam, type member of the family Nuculanidae inside Nuculida.

This species occurs frequently and varies a lot Pecten[4][12][13][14] A saltwater Scallop, type member of the family Pectinoidae inside Pectinida.

Natica[14] A saltwater moon Snail, type member of the family Naticidae inside Naticoidea.

Trochus[12][13] A saltwater top Snail, type member of the family Trochidae inside Trochoidea.

Frequently shows the embryonic chamber preserved as a bladder, slightly bent forward-towards the ventral side.

Senior synonym of Aegoceras centaurus[3] Coeloceras[3] C. pettos An Ammonite of the family Coeloceratidae inside Psilocerataceae.

[22] Fish Otoliths, originally assigned to the extant family Sciaenidae, then from members of Palaeoniscidae and some other research suggest affinities with Pholidophoriformes.

Is quoted the find of a "Flying Reptile" on the Hasle Sandstone by C. Malling at the beginning of the 20th century.

Hasle Harbour MGUH – 30889, single Footprint[7] Theropod Tracks, member of the ichnofamily Anchisauripodidae, incertae sedis inside Theropoda.

[7] Stenonyx footprints had been described from the Early Jurassic Soltykow (Hettangian) and an identical one from Szydlowek (Pliensbachian), linking southern Sweden, Bornholm and Poland, contiguous during the Early Jurassic and dinosaurs could thus freely roam this large area.

[7] Massopoda[27][28][30] Indeterminate Hasle Harbour DK966, metatarsal, metapodial or a propodial bone A Sauropodomorph of uncertain placement, probably a rather basal genus.

Sauropoda[31] Indeterminate Hasle Harbour DK976, spinous process from a cervical vertebrae A Sauropod Sauropodomorph.

Assigned to an early actual Sauropods, which also have quite powerful lateral processes and whose cervical vertebrae are relatively long.

Turiasauria[32] Indeterminate Hasle Harbour NHMD 1185136, Isolated tooth A possible Turiasaurian Eusauropod.

The oldest geological record of the family, likely represents a new unnamed taxon, estimated to have been 10–14 m long based on related taxa.