👉 The term "gullyhole" is a geological term that refers to a depression or depression-like feature formed in a river, lake, or other body of water due to the accumulation and spreading of sediments over time. Gullyholes are typically found at lower elevations and can be either flat or slightly incline-sided. Gullyholes form when water bodies such as rivers, lakes, or oceans accumulate sediment that is too heavy for the riverbed to hold. Over time, this accumulated sediment