The surface stratum resulting is known as an unconformity. Unconformable: Period of weathering/non-deposition. Further, there are two forms of contact between conformable strata: abrupt contacts (directly isolated beds of distinctly distinguished lithology, minor depositional break, referred to diastems) and gradational contact (steady change in deposition, mixing zone). The resulting surface strata are known as conformity. There are two types of contact in stratigraphy i.e.: conformable and unconformable.Ĭonformable: Non-fragmented accumulation, no breakages or hiatus (interruption or impairment in the continuity of the geological record).

Geo Chronostratigraphy - (Geochronostratigraphic unit) Pedostratigraphy – (Pedostratigraphic unit) Sequence stratigraphy (Allostratigraphic units) Lithostratigraphy (Lithostratigraphic unit)Ĭhronostratigraphy Types of Stratigraphyįollowing are the most important sub-disciplines in stratigraphy with their elements of study: It has been founded and formulated on the foundation that, with a smooth sequence of sedimentary layers, the layer in the footwall (below) is older (matured) than the layer in the hanging wall (above). The stratigraphic principle was initially introduced in 1669 by Nicolaus Steno in his documented work ‘Dissertations prodromus’. It also plays a part in solving general geological questions. Stratigraphy is the substructure for remodelling the Earth’s history.

It puts indirectly connected rock units together in a relationship. Stratigraphy organizes bodies of rock chronologically and spatially in accordance with their contained characteristics. Stratigraphic studies are mainly conducted to study sedimentary and volcanic layered rocks. With the help of stratigraphy, bodies of rock are dated and interlinked with each other. As a geological discipline, stratigraphy takes into account the spatial location and temporal sequence of rock bodies. It also renders insight into the geologic history of strata.

Stratigraphy is a branch of geology that deals with the description of rock or interpretation of geologic time scale. Understanding the stratigraphy meaning becomes quite simple when you get familiar with the stratigraphy principle of geology.

Stratigraphy program