Current Science

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Tidalites from the Cenomanian Nimar Sandstone, Bagh Group, Central India, are represented by (i) laterally accreted tidal bundles, (ii) herringbone cross-strata, (iii) sigmoidal cross-strata and (iv) tidal rhythmites with lenticular/wavy bedding. These indicate sedimentation in an upper subtidal to lower intertidal setting within fluvio marine interactive system. Time-series analysis of continuous rhythmic foreset bundles (sub-annual scale) manifests neap-spring tidal cycles within a diurnal tidal system with synodic and sidereal month lengths of ∼28.4 lunar days and ∼26.28 solar days respectively. Estimated Earth-Moon system parameters of the Late Cretaceous reveal no significant changes during the last ∼100 Ma.

Keywords

Cenomanian, Cross-Strata, Lamina Thickness, Lunar Orbital Cyclicity, Tidal Bundles.
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