• Subatlantic

    The Subatlantic is the current climatic age of the Holocene epoch. It started at about 2.500 years BP and is still ongoing. Its average temperatures were sli...

  • Stratigraphic column

    A stratigraphic column is a representation used in geology and its subfield of stratigraphy to describe the vertical location of rock units in a particular a...

  • Stratigraphic section

    Boundary Stratotype Section and Point, abbreviated GSSP, is an internationally agreed upon reference point on a stratigraphic section which defines the In th...

  • Reef

    A reef is a bar of rock, sand, coral or similar material, lying beneath the surface of water. Many reefs result from natural, abiotic processes - deposition ...

  • Principle of original horizontality

    The Principle of Original Horizontality states that layers of sediment are originally deposited horizontally under the action of gravity. It is a relative da...

  • Principle of lateral continuity

    The principle of lateral continuity states that layers of sediment initially extend laterally in all directions; in other words, they are laterally continuou...

  • Overstep

    An overstep is a geological form that has a deposition of a stratum across inclined, progressively older rocks. An onlap is a more general term than overstep...

  • Marshall Kay

    Marshall Kay was a geologist and professor at Columbia University. He is best known for his studies of the Ordovician of New York, Newfoundland, and Nevada, ...

  • Huangnitang Village, Changshan

    Huangnitang is a village of Zhoutang village, Tianma Subdistrict, Changshan County, Quzhou, Zhejiang Province, China. It is the location of the Global Bounda...

  • Horizon (geology)

    In geology, a horizon refers to either a bedding surface where there is marked change in the lithology within a sequence of sedimentary or volcanic rocks, or...

  • Harcourt Group

    The Harcourt Group is a stratigraphic group of siliciclastic rocks deposited in the Gondwanan Margin, cropping out in the Avalon Zone of Newfoundland.

  • Group (stratigraphy)

    A group in stratigraphy is a lithostratigraphic unit, a part of the geologic record or rock column that consists of defined rock strata. Groups are generally...

  • Geologic group

    A stratigraphic unit is a volume of rock of identifiable origin and relative age range that is defined by the distinctive and dominant, easily mapped and rec...

  • Facies

    In geology, a facies is a body of rock with specified characteristics, which can be any observable attribute of rocks, and the changes that may occur in thos...

  • Cross-cutting relationships

    Cross-cutting relationships is a principle of geology that states that the geologic feature which cuts another is the younger of the two features. It is a re...

  • Contact (geology)

    A geological contact is a boundary which separates one rock body from another. There are three different types of contacts, which are divided into primary co...

  • Caprock

    Caprock or cap rock is a harder or more resistant rock type overlying a weaker or less resistant rock type. Common types of caprock are sandstone and mafic r...

  • Bed (geology)

    Beds are the layers of sedimentary rocks that are distinctly different from overlying and underlying subsequent beds of different sedimentary rocks. Layers o...

  • Basement (geology)

    In geology, basement and crystalline basement are the rocks below a sedimentary platform or cover, or more generally any rock below sedimentary rocks or sedi...

  • Assise

    An assise, is a geological term for two or more beds or strata of rock united by the occurrence of the same characteristic species or genera. In the hierarch...

  • International Commission on Stratigraphy

    The International Commission on Stratigraphy, sometimes referred to by the unofficial name International Stratigraphic Commission is a daughter or major subc...

Stratigraphy

volcanic rocks. Stratigraphy has two related subfields: lithostratigraphy lithologic stratigraphy and biostratigraphy biologic stratigraphy Catholic priest
The International Commission on Stratigraphy ICS sometimes referred to by the unofficial name International Stratigraphic Commission is a daughter
Stratigraphy is a key concept to modern archaeological theory and practice. Modern excavation techniques are based on stratigraphic principles. The concept
A system in stratigraphy is a unit of rock layers that were laid down together within the same corresponding geological period. The associated period is
Stratigraphy and Geological Correlation is a bimonthly peer - reviewed scientific journal covering fundamental and applied aspects of stratigraphy It was
A group in stratigraphy is a lithostratigraphic unit, a part of the geologic record or rock column that consists of defined rock strata. Groups are generally
Reverse stratigraphy sometimes known as inverted stratigraphy is the result of a process whereby one sediment is unearthed by human or natural actions
Chronostratigraphy Glaciology Magnetostratigraphy Sedimentology Sequence stratigraphy Stratigraphy Mathur S.M. 2008 Elements of Geology. pp. 129 130. ISBN 9788120335158
Pennsylvanian and Mississippian series. In 2008, the International Commission on Stratigraphy had not yet named all four series of the Cambrian. Currently series are
Sequence stratigraphy is a branch of geology that attempts to subdivide and link sedimentary deposits into unconformity bound units on a variety of scales

formally defined layers or strata is central to the geologic discipline of stratigraphy Groups of strata are divided into formations, which are divided into
In geology, tectonostratigraphy is stratigraphy that refers either to rock sequences in which large - scale layering is caused by the stacking of thrust
The Stratigraphy of the Cambrian period currently has several schemes used for ordering geologic formations from the period. The International Commission
as the Wooded Peak Limestone or the Hawks Crag Breccia. New Zealand stratigraphy has also informally been divided into two megasequences The Austral
are defined by the International Commission on Stratigraphy ICS by reference to the stratigraphy at particular locations around the world. In 2004
biozone or biochronozone According to the International Commission on Stratigraphy the term chronozone refers to the rocks formed during a particular
Chronostratigraphy is the branch of stratigraphy that studies the age of rock strata in relation to time. The ultimate aim of chronostratigraphy is to
palaeontology and stratigraphy Now published by Wiley - Blackwell, it was originally published by the International Commission on Stratigraphy It is an official
Chart Time Scale www. stratigraphy org. International Commission on Stratigraphy International Commission on Stratigraphy Chart Retrieved 10 July
In the stratigraphy sub - discipline of geology, a Global Standard Stratigraphic Age, abbreviated GSSA, is a chronological reference point and criterion
sciences of geology, archaeology, and other fields dealing with geological stratigraphy It is a form of relative dating. In its plainest form, it states that

Commission on Stratigraphy International Commission of Stratigraphy PDF Stratigraphy org. International Commission of Stratigraphy Retrieved 15
bisselli first appear. Chart Time Scale www. stratigraphy org. International Commission on Stratigraphy Gradstein, F.M. Ogg, J.G. Smith, A.G. 2004:
Namurian stage of European stratigraphy and the middle and upper parts of the Chesterian stage of North American stratigraphy The Serpukhovian stage was
period. It was officially ratified by the International Commission on Stratigraphy in July 2018 along with the Greenlandian and the Meghalayan. The age
used in event stratigraphy Rey, J. 2008 Stratigraphy Foundations and Perspectives In Rey J. Galeotti S. ed. Stratigraphy Terminology and
Eric Cheney called him the chief theoretical architect of sequence stratigraphy Wheeler was a professor of geology at the University of Washington from
in 1982, and approved by the International Subcommission on Permian Stratigraphy in 1996. The Cisuralian Epoch is named after the western slopes of the
love with Eos, the Greek goddess of dawn and finds his place in the stratigraphy because this stage, the Tithonian, finds itself hand in hand with the
Chronostratigraphic Chart International Commission on Stratigraphy International Commission on Stratigraphy 2017 Alroy, John. Mammal Paleogene zones p. The

International Commission on Stratigraphy

The International Commission on Stratigraphy, sometimes referred to by the unofficial name International Stratigraphic Commission is a daughter or major subc...

Assise

An assise, is a geological term for two or more beds or strata of rock united by the occurrence of the same characteristic species or genera. In the hierarch...

Basement (geology)

In geology, basement and crystalline basement are the rocks below a sedimentary platform or cover, or more generally any rock below sedimentary rocks or sedi...

Bed (geology)

Beds are the layers of sedimentary rocks that are distinctly different from overlying and underlying subsequent beds of different sedimentary rocks. Layers o...

Bernician Series

In geology, Bernician Series was a term proposed by Samuel Pickworth Woodward in 1856 for the lower portion of the Carboniferous System, below the Millstone ...

Bioevent

A bioevent or bio-event is an event recognised in a sequence of sedimentary rocks, where there is a significant change in the biota as recorded by assemblage...

Caprock

Caprock or cap rock is a harder or more resistant rock type overlying a weaker or less resistant rock type. Common types of caprock are sandstone and mafic r...

Chemostratigraphy

Chemostratigraphy, or chemical stratigraphy, is the study of the chemical variations within sedimentary sequences to determine stratigraphic relationships. T...

Contact (geology)

A geological contact is a boundary which separates one rock body from another. There are three different types of contacts, which are divided into primary co...

Cross-cutting relationships

Cross-cutting relationships is a principle of geology that states that the geologic feature which cuts another is the younger of the two features. It is a re...

Diastem

In geology, a diastem is a short interruption in sedimentation with little or no erosion. They can also be described as very short unconformities.In 1917 Jos...

Environmental magnetism

Environmental magnetism is the study of magnetism as it relates to the effects of climate, sediment transport, pollution and other environmental influences o...

Facies

In geology, a facies is a body of rock with specified characteristics, which can be any observable attribute of rocks, and the changes that may occur in thos...

Foundered strata

Foundered strata is a term used by the British Geological Survey in its maps and geological memoirs, and indeed by other authors, to describe rock strata whi...

Geochronometry

The measurement of geologic time is a long-standing problem of geology. When geology was at its beginnings, a major problem for stratigraphers was to find a ...

Geologic group

larger in scale, the main units recognised are Bed, Member, Formation, Group and Supergroup. A bed is a lithologically distinct layer within a member The geo...

Sinnipee Group

The Sinnipee Group is a geological group in Wisconsin. It consists primarily of sedimentary carbonate rocks. Primarily made of dolomite, it also has limeston...

Geologic group

A stratigraphic unit is a volume of rock of identifiable origin and relative age range that is defined by the distinctive and dominant, easily mapped and rec...

Group (stratigraphy)

A group in stratigraphy is a lithostratigraphic unit, a part of the geologic record or rock column that consists of defined rock strata. Groups are generally...

Harcourt Group

The Harcourt Group is a stratigraphic group of siliciclastic rocks deposited in the Gondwanan Margin, cropping out in the Avalon Zone of Newfoundland.

Horizon (geology)

In geology, a horizon refers to either a bedding surface where there is marked change in the lithology within a sequence of sedimentary or volcanic rocks, or...

Huangnitang Village, Changshan

Huangnitang is a village of Zhoutang village, Tianma Subdistrict, Changshan County, Quzhou, Zhejiang Province, China. It is the location of the Global Bounda...

Ilocos-Central Luzon Basin

Bayabas Formation Angat Formation Makapilapil Formation Tartaro Formation Lambak Formation Guadalupe Formation Madlum Formation Barenas-Baito Formation

Marshall Kay

Marshall Kay was a geologist and professor at Columbia University. He is best known for his studies of the Ordovician of New York, Newfoundland, and Nevada, ...

Heinz Kozur

Heinz Walter Kozur was a German paleontologist and stratigrapher. In 1974, with Mock, he described the conodont genus Misikella, in 1975, with Merrill, the g...

Polarity chron

Magnetostratigraphy is a geophysical correlation technique used to date sedimentary and volcanic sequences. The method works by collecting oriented samples a...

Natural remanent magnetization

Natural remanent magnetization is the permanent magnetism of a rock or sediment. This preserves a record of the Earths magnetic field at the time the mineral...

Neocomian

In geology, Neocomian was a name given to the lowest stage of the Cretaceous system. It was introduced by Jules Thurmann in 1835 on account of the developmen...

Onlap

Onlap or overlap is the geologic phenomenon of successively wedge-shaped younger rock strata extending progressively further across an erosion surface cut in...

Overstep

An overstep is a geological form that has a deposition of a stratum across inclined, progressively older rocks. An onlap is a more general term than overstep...

Polarity chron

units characterized by their magnetic polarity Such units are called magnetostratigraphic polarity units or chrons If the ancient magnetic field was Chron ma...

Principle of lateral continuity

The principle of lateral continuity states that layers of sediment initially extend laterally in all directions; in other words, they are laterally continuou...

Principle of original horizontality

The Principle of Original Horizontality states that layers of sediment are originally deposited horizontally under the action of gravity. It is a relative da...

Reef

A reef is a bar of rock, sand, coral or similar material, lying beneath the surface of water. Many reefs result from natural, abiotic processes - deposition ...

Stratigraphic section

Boundary Stratotype Section and Point, abbreviated GSSP, is an internationally agreed upon reference point on a stratigraphic section which defines the In th...

Stratigraphic column

A stratigraphic column is a representation used in geology and its subfield of stratigraphy to describe the vertical location of rock units in a particular a...

Stratigraphic cycles

Stratigraphic cycles refer to the transgressive and regressive sequences bounded by unconformities in the stratagraphic record on the cratons. These cycles r...

Subatlantic

The Subatlantic is the current climatic age of the Holocene epoch. It started at about 2.500 years BP and is still ongoing. Its average temperatures were sli...

Tectonostratigraphy

In geology, tectonostratigraphy is stratigraphy that refers either to rock sequences in which large-scale layering is caused by the stacking of thrust sheets...

Topostratigraphy

Topostratigraphy is a method of establishing stratigraphical units based on a mix of biostratigraphy and lithostratigraphy. It is used locally in the Baltic ...

Trilobite zone

Trilobites are used as index fossils to subdivide the Cambrian period. Assemblages of trilobites define trilobite zones. The Olenellus -zone has traditionall...

Type locality (geology)

Type locality, also called type area, or type section, is the locality where a particular rock type, stratigraphic unit or mineral species is first identifie...

Volcano-sedimentary sequence

A volcano-sedimentary sequence is a stratigraphic sequence derived from the alternation and combination of volcanic and sedimentary events. The volcanic mate...

Way up structure

A way up structure, way up criterion, or geopetal indicator is a characteristic relationship observed in a sedimentary or volcanic rock, or sequence of rocks...