02612nas a2200301   4500008004100000022001400041245025200055210006900307260001200376300001300388490000700401520158200408653001301990653001302003653003002016653001802046653001002064653001102074653002002085653001902105653002602124653001402150653001802164653002502182100001602207700001602223856007102239       2021                        eng d  a1042-094000aTrace fossils, depositional context, and paleogeography of the upper Tal Group (upper lower Cambrian), Lesser Himalaya, India: a Gondwanan succession with no affinities to the Avalonia microcontinent – discussion of paper by Singh et al. (2019)0 aTrace fossils depositional context and paleogeography of the upp  c11/2020  a143-156 0 v283 a<p>Terminal Ediacaran–late early Cambrian deposition, faunas and passive margin evolution of the north Indian margin are recorded in the Nigali Dhar syncline succession. Restudy of the upper Tal Group (upper lower Cambrian Koti Dhaman Formation, KDF) ichnofauna from the Khud-Drabil section reduces it to 18 confidently named forms. The lower KDF (Lower Quartzite Member) Cruziana-Rusophycus assemblage is in subtidal (not intertidal) sandsheet facies. The overlying black Shale Member (SM) records trans-East Gondwanan deepening, not intertidal facies, in the Palaeolenus Zone. The SM, with low diversity Planolites-Palaeophycus assemblage, is overlain by subtidal (not intertidal) sandsheet facies of the middle KDF (Arkosic Sandstone Member, ASM) with shallow burrowers and furrowers (Gordia marina assemblage, new; Cruziana ichnofacies). KDF faunas with Cruziana and Rusophycus are similar to coeval, shallow marine associations elsewhere in Gondwana and NW Laurentia. Interpretation of a second KDF section 20 km from Khud-Drabil has confused an understanding of Lesser Himalaya geologic evolution as it claims Ordovician Cruziana species in the ASM and an angular SM–ASM unconformity caused by the Cambrian–Ordovician boundary Kurgiakh orogeny. However, upper lower Cambrian microfaunas occur in and above the ASM, while the angular SM–ASM unconformity is consistent with submarine sliding. KDF-type ichnofaunas do not show a tropical location of Avalonia, which has the distinctive lithofacies and biotas of a high-latitude continent unrelated to Gondwana.</p>
10aAvalonia10aCambrian10adepositional environments10aEast Gondwana10aIndia10aIsrael10aLesser Himalaya10apaleogeography10asequence stratigraphy10aTal Group10atrace fossils10aupper Lower Cambrian1 aLanding, E.1 aGeyer, Gerd  uhttps://www.tandfonline.com/doi/full/10.1080/10420940.2020.1843457