In geology and related fields, a stratum (pl.: strata) is a layer of rock or sediment characterized by certain lithologic properties or attributes that distinguish it from adjacent layers from which it is separated by visible surfaces known as either bedding surfaces or bedding planes. [1]

stratification, the layering that occurs in most sedimentary rocks and in those igneous rocks formed at the Earth’s surface, as from lava flows and volcanic fragmental deposits. The layers range from several millimetres to many metres in thickness and vary greatly in shape.

2023年11月21日 · The term rock strata refers to layers of sedimentary rock. These horizontal layers form from the processes of weathering, erosion, deposition, compaction, and cementation.

Strata are layers of rock, or sometimes soil. In nature, strata come in many layers. It is a term in sedimentary and historical geology; the singular is stratum. The study of strata is called stratigraphy. These layers are laid down as sediment, often in the sea, and are slowly changed by pressure, heat and chemical action into rocks.

Any layer of rock in a sedimentary sequence that can be distinguished from the layers above and below is a bedding plane. Bedding planes, also called beds or strata (singular: stratum) are the simplest sedimentary structures and the smaller lithostratigraphic unit used by geologists to describe sedimentary formations. What allows the ...

Lithostratigraphy is a sub-discipline of stratigraphy, the geological science associated with the study of strata or rock layers. Major focuses include geochronology, comparative geology, and petrology. In general, strata are primarily igneous or sedimentary relating to …

2023年2月21日 · A stratum is a rock layer with a lithology (texture, color, grain size, composition, fossils, etc.) different from the adjacent ones and several form strata. Each stratum is separated by a visible bedding surface or plane.

Geologic strata, also known as rock layers or rock formations, are the result of the sedimentation, deposition, and cementation of minerals, rocks, and other Earth materials over millions of years. These strata provide a window into Earth’s geological history, revealing the processes that have shaped our planet and its life.

2021年9月23日 · Stratigraphy is the study of the distribution of sediments and sedimentary rocks in space and time. It is essential for understanding Earth history, reservoir properties, etc. Sedimentological interpretations are placed into a stratigraphic context for detailed interpretations of changes in environments over time.

Stratum, sedimentary rock layer bounded by two stratification planes, the latter being produced by visible changes in the grain size, texture, or other diagnostic features of the rocks above and below the plane.