An irregular pile of laminated sandy beds which are lens shaped in two directions and have low angle cross stratifications are called ________.

Question

Quizplus · Accepted Answer

Hummocky cross stratification typically forms as a result of storm-enhanced waves or currents in a shallow marine environment. The irregular pile of laminated sandy beds with low angle cross stratifications is characteristic of this type of deposit. Current ripple marks (A) typically have symmetric ripples and indicate uniform tidal currents, while graded beds (B) are deposited by turbidity currents, which carry sediment down the continental slope. Oscillation ripple marks (D) form from gentle wave action in a shallow near-shore environment and have symmetric wave patterns.

An Irregular Pile of Laminated Sandy Beds Which Are Lens