Lithology sense of displacement across the zone. In igneous rocks, small-scale structures are mostly observed in lavas such as pahoehoe versus ʻAʻā basaltic flows, and pillows showing eruption within a body of water or beneath ice. Unconsolidated surficial materials may also be given a lithology. This is defined by grain size and composition, and is often attached to an interpretation of how the unit formed. Surficial lithologies can be given to lacustrine, coastal, fluvial, aeolian, glacial, and recent volcanic deposits, among others. Examples of surficial lithology classifications used by the US Geological Survey are, "Glacial Till, Loamy", "Saline Lake Sediment", and
Area of Natural and Scientific Interest occur within national parks, provincial parks, or conservation reserves". These may also be nationally or internationally significant features. An Earth Science area is one in which the representative feature was created by geologic processes and consists of the physical elements of a natural landscape, such as the bedrock, landforms, and fossils. These are identified by lithology, paleontology, and geomorphology, then classified "into geological themes" according to age, stratigraphy, topography, and other characteristics. A Life Science area is one in which the representative feature consists of the biodiversity of the area and its landscapes, and has not been affected by human