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Pragian: Pragian life & Overview

The Pragian is one of three faunal stages in the Early Devonian Epoch. It lasted from 413.02 ± 1.91 million years ago to 410.62 ± 1.95 million years ago. It was preceded by the Lochkovian Stage and followed by the Emsian Stage. The most important Lagerstätte of the Pragian is Rhynie chert in Scotland. It is named after the city of Prague. The GSSP is…

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Pragian topic overview

The analysis highlights Pragian life and Overview as prominent areas in the source structure around Pragian.

Related topics
14
Source areas
2
Connected nodes
16
Extracted relationships
14
Concept neighborhoods
13
Bridge connections
16

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Overview · 10 topics
Pragian life · 4 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Celestial body
Earth
Chronological unit
Age
Lower boundary definition
FAD of the conodonts Eognathodus sulcatus and Latericriodus steinachensis Morph beta
Lower GSSP ratified
1989
Name formality
Formal
Name ratified
1985

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

Pragian life

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How Pragian connects Entity context

The extracted context around Pragian shows recurring relationship patterns in the source. For example, Pragian → Earth Another extracted example is Pragian → Age. Use these groups to spot repeated connection types before inspecting the individual relationships.

Pragian

Top relations

Celestial body · 1
Pragian → Earth
Chronological unit · 1
Pragian → Age
Lower boundary definition · 1
Pragian → FAD of the conodonts Eognathodus sulcatus and Latericriodus steinachensis Morph beta
Lower boundary GSSP · 1
Pragian → Velká Chuchle quarry, Prague, Czech Republic .mw-parser-output .geo-default,.mw-parser-output .geo-dms,.mw-parser-output .geo-dec{display:inline}.mw-parser-output .geo-nondefaul…
Lower GSSP ratified · 1
Pragian → 1989
Name formality · 1
Pragian → Formal
Name ratified · 1
Pragian → 1985
Regional usage · 1
Pragian → Global (ICS)
Stratigraphic unit · 1
Pragian → Stage
Time scale(s) used · 1
Pragian → ICS Time Scale

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

stage prague lochkovian emsian early devonian 413 02 91 years ago 410 62 95 rhynie chert gssp velká chuchle time

Pragian relationships Subject–Predicate–Object triples

TTTA extracted 14 structured relationships around Pragian. Examples in this analysis include Pragian → Celestial body → Earth and Pragian → Chronological unit → Age. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
PragianCelestial bodyEarth1.00infobox
PragianChronological unitAge1.00infobox
PragianLower boundary definitionFAD of the conodonts Eognathodus sulcatus and Latericriodus steinachensis Morph beta1.00infobox
PragianLower boundary GSSPVelká Chuchle quarry, Prague, Czech Republic .mw-parser-output .geo-default,.mw-parser-output .geo-dms,.mw-parser-output .geo-dec{display:inline}.mw-parser-output .geo-nondefaul…1.00infobox
PragianLower GSSP ratified19891.00infobox
PragianName formalityFormal1.00infobox
PragianName ratified19851.00infobox
PragianRegional usageGlobal (ICS)1.00infobox
PragianStratigraphic unitStage1.00infobox
PragianTime scale(s) usedICS Time Scale1.00infobox
PragianTime span formalityFormal1.00infobox
PragianUpper boundary definitionFAD of the conodont Polygnathus kitabicus1.00infobox
PragianUpper boundary GSSPZinzil'ban Gorge, Uzbekistan 39°12′00″N 67°18′20″E / 39.2000°N 67.3056°E / 39.2000; 67.30561.00infobox
PragianUpper GSSP ratified19951.00infobox

Related concept clusters Concept neighborhoods

The concept neighborhoods around Pragian bring nearby vocabulary together. In this analysis, examples include Chert, Devonian and Early. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • Pragian
    • Chert
    • Devonian
    • Early
    • Rhynie
    • Time
    • Stage
    • Boundary
    • Epoch
    • Faunal
    • Important
    • Lagerstätte
    • Lower
  • pragian
    • Chert
    • Devonian
    • Early
    • Rhynie
    • Time
    • Stage
    • Boundary
    • Epoch
    • Faunal
    • Important
    • Lagerstätte
    • Lower
  • pragian life
    • Chert
    • Devonian
    • Early
    • Rhynie
    • Time
    • Stage
    • Boundary
    • Epoch
    • Faunal
    • Important
    • Lagerstätte
    • Lower
  • early devonian
    • Devonian
    • Early
    • Boundary
    • Epoch
    • Faunal
    • Lower
    • One
    • Pragian
    • Stages
    • Three
    • Ago
    • Appeared
  • rhynie chert
    • Rhynie
    • Boundary
    • Important
    • Lagerstätte
    • Lower
    • Pragian
    • Scotland
    • Appeared
    • Chuchle
    • Devonian
    • Early
    • Emsian
  • lochkovian
    • Emsian
    • Boundary
    • Followed
    • Lower
    • Preceded
    • Stage
    • Appeared
    • Chert
    • Chuchle
    • Gssp
    • Rhynie
    • Time
  • emsian
    • Lochkovian
    • Boundary
    • Followed
    • Lower
    • Preceded
    • Stage
    • Appeared
    • Chert
    • Chuchle
    • Gssp
    • Rhynie
    • Time
  • velká chuchle
    • Gssp
    • Velká
    • Prague
    • Boundary
    • Located
    • Lower
    • Appeared
    • Devonian
    • Early
    • Emsian
    • Lochkovian
    • Rhynie

Connections between topic areas Semantic bridges

For Pragian, one of the stronger structural bridges in this analysis connects Pragian with Overview. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
Pragian — Overview · splits 6 ⟂ 11
Pragian — Pragian life · splits 12 ⟂ 5

Map overview Semantic statistics

Pragian

Nodes17
Edges16
Triples14
Avg. degree1.88
Density0.117647
Components1

Source & methodology

TTTA analyzes the structure around Pragian to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Pragian life & Overview, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — Pragian · EN edition · Analysis: TopicsToTalkAbout

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