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Index Fossils and International Stratotypes Biostratigraphy and Global Politics.

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Index Fossils and Index Fossils and International International Stratotypes Stratotypes Biostratigraphy and Biostratigraphy and Global Politics Global Politics
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Page 1: Index Fossils and International Stratotypes Biostratigraphy and Global Politics.

Index Fossils andIndex Fossils andInternational International StratotypesStratotypes

Biostratigraphy and Global Biostratigraphy and Global PoliticsPolitics

Page 2: Index Fossils and International Stratotypes Biostratigraphy and Global Politics.

Systems, Series, Systems, Series, StagesStages Devonian SystemDevonian System

– Upper Devonian SeriesUpper Devonian Series FamennianFamennian FrasnianFrasnian

– Middle Devonian SeriesMiddle Devonian Series GivetianGivetian EifelianEifelian

– Lower DevonianLower Devonian EmsianEmsian PragianPragian LochkovianLochkovian

Silurian SystemSilurian System– Upper Silurian SeriesUpper Silurian Series

PPřířídoldolíí Stage Stage

Page 3: Index Fossils and International Stratotypes Biostratigraphy and Global Politics.

Units DefinedUnits Definedby Index Fossilsby Index Fossils What is an Index Fossil?What is an Index Fossil? Limited Stratigraphic RangeLimited Stratigraphic Range Widespread Geographic Widespread Geographic

DistributionDistribution Commonly PelagicCommonly Pelagic Or, tolerant of a wide variety of Or, tolerant of a wide variety of

environments (found in many environments (found in many facies)facies)

Page 4: Index Fossils and International Stratotypes Biostratigraphy and Global Politics.

Index FossilsIndex Fossilsand the S-D Boundaryand the S-D Boundary

Graptolites *Graptolites * Conodonts *Conodonts * Chitinozoans *Chitinozoans * TrilobitesTrilobites BrachiopodsBrachiopods CephalopodsCephalopods

Page 5: Index Fossils and International Stratotypes Biostratigraphy and Global Politics.

Definition ofDefinition ofthe S-D Boundarythe S-D Boundary

GSSP: Global Stratotype Sequence and PointGSSP: Global Stratotype Sequence and Point Point chosen as first appearance of the Point chosen as first appearance of the

graptolite graptolite Monograptus uniformis uniformisMonograptus uniformis uniformis Auxiliary index species – the conodont Auxiliary index species – the conodont Icriodus Icriodus

woschmidti woschmidtiwoschmidti woschmidti Stratotype: Klonk, near Suchomasty, Czech Stratotype: Klonk, near Suchomasty, Czech

RepublicRepublic Auxiliary Stratotype: BudAuxiliary Stratotype: Budňňanskanskáá Sk Skáála/Karlla/Karlšštejn tejn

Page 6: Index Fossils and International Stratotypes Biostratigraphy and Global Politics.

Definition ofDefinition ofthe S-D Boundarythe S-D Boundary

Stratotype: Stratotype: Klonk, near Klonk, near Suchomasty, Suchomasty, Czech RepublicCzech Republic

Page 7: Index Fossils and International Stratotypes Biostratigraphy and Global Politics.

S-D GSSPS-D GSSP

First appearance First appearance of of Monograptus Monograptus uniformis uniformis uniformisuniformis

Bed 20Bed 20 Klonk, CzechiaKlonk, Czechia

Page 8: Index Fossils and International Stratotypes Biostratigraphy and Global Politics.

Preserving the GSSPPreserving the GSSP

Dr. Ivo Chlupáč

Page 9: Index Fossils and International Stratotypes Biostratigraphy and Global Politics.

Auxiliary Stratotype: Auxiliary Stratotype: BudBudňňanskanskáá SkSkáála/Karlla/Karlšštejntejn

Page 10: Index Fossils and International Stratotypes Biostratigraphy and Global Politics.

PPřířídoldolí Stratotype: í Stratotype: PožáryPožáry

Page 11: Index Fossils and International Stratotypes Biostratigraphy and Global Politics.

Pragian Stratotype:Pragian Stratotype:VelkVelká Chuchleá Chuchle

Page 12: Index Fossils and International Stratotypes Biostratigraphy and Global Politics.

Why does it matter?Why does it matter?

Precise correlationsPrecise correlations Precise timing for inter-regional Precise timing for inter-regional

comparisonscomparisons Time frame for discerning global Time frame for discerning global

eventsevents

Page 13: Index Fossils and International Stratotypes Biostratigraphy and Global Politics.

Ranges of ConodontsRanges of Conodontsnear the S-D Boundarynear the S-D Boundary

Page 14: Index Fossils and International Stratotypes Biostratigraphy and Global Politics.

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