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Elverhl, A.: The Janusfjellet Subgroup (Bathonian to Hauterivian) on central Spitsbergen: a revised lithostratigraphy. Polar Research 9(1), 21-43. The Janusfjellet Subgroup is a marine shelf to prodeltaic succession dominated by shales with subordinate siltstones and sandstones. The subgroup comprises a lower Agardhfjellet (Upper Bathonian -Berriasian) and an upper Rurikfjellet (Berriasian -Hauterivian) formation. Based on field work in central Spitsbergen the following subdivisions of the formations are proposed (units listed in ascending order).The Agardhfjellet Formation (up to 290 m thick) contains four members: Oppdalena fining upwards succession from conglomerates to shales; Lardyfjelletblack paper shales; Oppdalsitagrey shales with siltstones and sandstones; and SlottsmQyagrey shales and black paper shales. Within the Oppdalen Member three beds are recognised: Brentskardhaugenphosphoritic conglomerate; Marhogdaglauconitic sandstones; and Dronbreensiltstones and shales.The Rurikfjellet Formation (thickness up to 226 m) is composed of two members: Wimanfjelletgrey and partly silty shale sequence, containing the Myklegardfjellet Bed (of plastic clays) at its base; and Ullabergetsilty and sandy shales with siltstones and sandstones.

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