An ichnofossil assemblage from the fluvial deposits of the Upper Pliocene-Pleistocene Pinjor Formation (Siwalik Group), northwestern Himalayas, India: Palaeoenvironmental implications

作者：Khosla Ashu; Lucas Spencer G^*

来源：Journal of Earth System Science, 2018, 127(5): 69.

DOI：10.1007/s12040-018-0977-5

• Upper Pliocene-Pleistocene
• Pinjor Formation
• palaeoenvironmental significance
• Siwalik Group
• Scoyenia ichnofacies

Continental (fluvial) strata of the Pinjor Formation (Siwalik Group), northwestern Himalayas, India, contain an invertebrate trace fossil assemblage containing Planolites beverleyensis, Palaeophycus isp., Scoyenia gracilis, Taenidium barretti and other undifferentiated traces. The traces are found in an 26 m thick interval of alternating pinkish red siltstone, which is intercalated with mudstone, and thickly-bedded buff and greenish coloured sandstone. These sediments are interpreted as the deposits of floodplains and channel-bars of fluvial environments and low-energy overbank floodplain deposits. The trace fossils studied here are the first well documented ichnofossil assemblage from the vast, late Cenozoic Siwalik depositional system. They are not only of palaeoenvironmental significance, but they add to the growing ichnofossil database in facies of fluvial origin and should be an impetus to further ichnological studies of the Siwalik Group.

• 出版日期2018-7