Table of Contents
What is a cyclical sedimentary rock sequence?
Cyclic sediments (also called rhythmic sediments) are sequences of sedimentary rocks that are characterised by repetitive patterns of different rock types (strata) or facies within the sequence.
What is a stratigraphic succession?
The principle of stratigraphic succession states that any given unit of archaeological stratification exists within the stratigraphic sequence from its position between the undermost of all higher units and the uppermost of all lower units and with which it has a physical contact.
What is rhythmic sedimentation?
A regular interbanding of two or more types of sediment or sedimentary rocks due to a regular change in the conditions of sedimentation, such as alternation of wet and dry periods.
How do you sequence stratigraphy?
Sequence stratigraphy is defined as the study of rock relationships within a chronostratigraphic framework of repetitive genetically related strata bounded by surfaces of erosion or deposition or their correlative conformities.
What kind of rock is formed by the process of Lithification?
sedimentary rocks
Lithification is the process by which sediments combine to form sedimentary rocks. Compaction is a consolidation of sediments due to the intense pressing weight of overlying deposits. With compaction, sediment grains get squished together, reducing the size of the original pore space that divided them.
What is a stratigraphic model?
It is a powerful solution that allows modeling the development of stratigraphic sequences at regional scale or at field scale. The model solves the equation of sediment transport as a function of basin topography, sea level variations, and accommodation space.
What is the correct order of formation for clastic sedimentary rocks?
Formation of Sedimentary Rocks Sedimentary rocks are the product of 1) weathering of preexisting rocks, 2) transport of the weathering products, 3) deposition of the material, followed by 4) compaction, and 5) cementation of the sediment to form a rock. The latter two steps are called lithification.
What is stratigraphy used for?
Stratigraphy is they classification of different layers or layering of sedimentary deposits, and in sedimentary or layered volcanic rocks. This field is important to understanding the geological history and forms the basis for classification of rocks into distinct units that can be easily mapped.
What is the sequence of events in the lithification of sandstone?
Sedimentary rocks are the product of 1) weathering of preexisting rocks, 2) transport of the weathering products, 3) deposition of the material, followed by 4) compaction, and 5) cementation of the sediment to form a rock. The latter two steps are called lithification.
What are cyclic sediments called?
Cyclic sediments. Cyclic sediments (also called rhythmic sediments) are sequences of sedimentary rocks that are characterised by repetitive patterns of different rock types ( strata) within the sequence. Cyclic sediments can be identified as either autocyclic or allocyclic, and can be hundreds or even thousands of metres thick.
What is an automatic sequence?
Automatic sequences are robust against variations to either the definition or the input sequence. For instance, as noted in the automata-theoretic definition, a given sequence remains automatic under both direct and reverse reading of the input sequence.
What is the difference between allocyclic and eustatic processes?
In contrast, allocyclic processes include changes in energy and materials within a sedimentary system induced by processes external to the sedimentary system. Allocyclic processes include eustatic, tectonic, and climatic change. Beerbower (1969, p. 1843) summarized his concepts as follows:
How many types of sedimentary cyclic successions are there?
Based on the processes that generate the cyclic deposits, two types of sedimentary cyclic successions can be distinguished.