On the origin of non‐tidal flaser bedding in point bar deposits of the river Ajay, Bihar and West Bengal, NE India

Abstract

ABSTRACT Flaser bedding of non‐tidal origin has been described from point bar deposits of the Ajay river, NE India. Mud drapes are deposited during waning flood phases. The preferential accumulation of curled, desiccated mud laminae in ripple troughs during periods of exposure produces mud streaks resembling classical flaser bedding. This process of non‐tidal flaser formation is unlike the common tidal origin related to flood and ebb cycles, and the less common mechanism of formation in fluvial systems by deposition of mud in ripple troughs after floods.