The Miers Bluff Formation in the Hurd Peninsula, Livingston Island, West Antarctica, has been interpreted to be a sequence of turbidites, which may represent sedimentation upper and lower mid-fan settings. Its thickness is more than 3 000 m (base unknown), in age of Late Triassic. Many trace fossils of the whole succession were found in the turbidites of the Miers Bluff Formation. All of these trace fossils are deep-sea ichnofossils. There are fifteen ichnogenus, sixteen ichnospecies. They are Belorhaphe ichnosp., Cochlichnus ichonosp., Fucusopsis annulata Palibin, Glockerichnus ichnosp., Halyminidium sublumbricoides(Azpeitia), Lophoctenium comosum Richter, Neonereites uniserialis Seilacher, Paleodictyon ichnosp., Paleaichnus antarctics ichnogen. et ichnosp. nov., Planolites montanus Richter, Rhabdoglyphus grossheimi Vassoevich, Spirophycus bicornism Heer, Strobilorhaphe ichnosp., Sublorenzinia cf . plana Ksiazkiewicz, Tuberculichnus meandrinus Ksiazkiewicz, Tuberculichnus bulbosus Ksiazkiewicz.. We, moreover, found a new trace fossil and propose a new ichnogenus and new ichnospecies Paleaichnus antarctics ichnogen. et ichnosp. nov.. Except the new ichnogenus and ichnospecies, others had been found in deep-sea turbidites. Some are in mudstone, preserved in the cast convex of overlying sandstone sole. They formed before turbidity flows occurred and belong to the high differentiated Graphoglyptida of abyssal mudstone, for example, Belorhaphe, Glockerichnus, Lophoctenium, Rhabdoglyphus, Paleodictyon, Sublorenzinia, Spirophycus, Strobilorhaphe, Tuberculichnus and Cochlichnus et al. Others as Fucusopsis and Neonereites are preserved in sandstones and stand for trace assemblages after turbidity sedimentation. These trace fossils are typical members of abyssal “Nereites” ichnofacies, and provide for the depositional environment of the Miers Bluff Formation.
Deng Xiguang,Zheng Xiangshen,Liu Xiaohan et al. TRACE FOSSILS AND THEIR ENVIRONMENTAL SIGNIFICANCE IN THE MIERS BLUFF FORMATION, LIVINGSTON ISLAND, WEST ANTARCTICA[J]. Chinese Journal of Geology, 2000, (4): 422-431.