Isoverflak

Isoverflak is a term used in geology to describe a geological formation or deposit that is relatively flat-lying and exhibits a limited vertical extent. It is characterized by its extensive lateral spread compared to its thickness. These formations can be composed of various sedimentary materials such as sand, silt, clay, or volcanic ash. The depositional environments that create isoverflak formations are typically broad and shallow, like ancient lakebeds, continental shelves, or extensive floodplains.

The term "isoverflak" is not a formally defined geological term but rather a descriptive one used by geologists to categorize certain landscape features or subsurface strata. It highlights the aspect of lateral continuity and a relatively uniform, thin character. Examples of features that might be described as isoverflak include thin layers of ash deposited over a wide area from a volcanic eruption, or extensive sheets of alluvium laid down by meandering rivers. Understanding isoverflak deposits is important in various geological studies, including resource exploration (like groundwater or some mineral deposits), understanding ancient environments, and seismic interpretation. The lack of significant topographic relief is a key characteristic.