Research any topic before you write.

Find related topics. | Discover entities. | See connections. | Build a topical map.

Ordovician: Geography & Art

The Ordovician (/ɔːrdəˈvɪʃi.ən, -doʊ-, -ˈvɪʃən/ or-də-VISH-ee-ən, -⁠doh-, -⁠VISH-ən) is a geologic period and system, the second of six periods of the Paleozoic Era, and the second of twelve periods of the Phanerozoic Eon. The Ordovician spans 43.75 million years from the end of the Cambrian Period 486.85 Ma (million years ago) to the start of the…

Language: English [EN]
Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.
100%
More settings
100% 100% 100% 100% 100%

Ordovician topic overview

The analysis highlights Geography and Art as prominent areas in the source structure around Ordovician.

Related topics
155
Source areas
7
Connected nodes
162
Extracted relationships
129
Related term clusters
35
Bridge connections
162

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.

Life · 67 topics
Overview · 30 topics
Paleogeography and tectonics · 23 topics
End of the period · 14 topics
Climate and sea level · 13 topics
Geochemistry · 6 topics
Subdivisions · 2 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
Period
First proposed by
Charles Lapworth, 1879
Lower boundary definition
FAD of the Conodont Iapetognathus fluctivagus
Lower GSSP ratified
January 2000: 19
Name formality
Formal

Start with your topic. Discover where to go next.

Explore different angles and find fresh ideas to shape your next piece of content.

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

Subdivisions

Paleogeography and tectonics

Geochemistry

Climate and sea level

Life

End of the period

For the semantics nerds

You can skip this section if you’re here for content ideas and keyword inspiration.

Advanced semantic analysis

How Ordovician connects Entity context

The extracted context around Ordovician shows recurring relationship patterns in the source. For example, Ordovician → Africa, Baltoscandia, Boda Event, Carbon, Darriwilian, Despite, Early Eocene Climatic Optimum, Early Ordovician, Early Palaeozoic Ice Age, Earth, Europe, Evidence, Floian, Hibernian, Hirnantian, Katian, Late Ordovician, Locally, Middle Ordovician, Paleozoic Another extracted example is Ordovician → Alborz, Another, Argentinian, Articulate, Baltica, Baltican, Cambrian, Celtic, Faunas, Gondwana, Gondwana's, Great Ordovician Biodiversification Event, Iapetus Ocean, Laurentia, Laurentian, Middle Ordovician, North China, Palaeozoic, Paleozoic, Phanerozoic. Use these groups to spot repeated connection types before inspecting the individual relationships.

Ordovician

Top relations

related to Climate and sea level · 27
Ordovician → Africa, Baltoscandia, Boda Event, Carbon, Darriwilian, Despite, Early Eocene Climatic Optimum, Early Ordovician, Early Palaeozoic Ice Age, Earth, Europe, Evidence, Floian, Hibernian, Hirnantian, Katian, Late Ordovician, Locally, Middle Ordovician, Paleozoic
related to Fauna · 25
Ordovician → Alborz, Another, Argentinian, Articulate, Baltica, Baltican, Cambrian, Celtic, Faunas, Gondwana, Gondwana's, Great Ordovician Biodiversification Event, Iapetus Ocean, Laurentia, Laurentian, Middle Ordovician, North China, Palaeozoic, Paleozoic, Phanerozoic
related to Paleogeography and tectonics · 17
Ordovician → Aegir Ocean, Asia, Avalonia, Baltica, Carboniferous, Central Mongolian, Europe, Gondwana, Laurentia, North America, Paleoasian Ocean, Rheic Ocean, Siberia, South Pole, The Mongol-Okhotsk Ocean, The Panthalassic Ocean, Tornquist Sea
related to Subdivisions · 11
Ordovician → Australian, British, Chinese, ICS, Mediterranean, North American, North-Gondwanan, Ordovician Period, Pre-existing Baltoscandic, Siberian, System
related to Life · 9
Ordovician → Agnostida, Asaphida, Brachiopods, Earth's, Late Ordovician, Ordovician Period, Ptychopariida, Silurian, The Ordovician
related to Flora · 7
Ordovician → Among, Fossil, Glomerales, Green, Late Cambrian, Terrestrial, Wisconsin
related to End of the period · 5
Ordovician → Earth's, Permian, Silurian Period, The Ordovician, Triassic
related to Geochemistry · 4
Ordovician → Biogenic, Carbonate, The Ordovician, Unlike Cambrian
related to Ordovician meteor event · 3
Ordovician → Earth, Middle Ordovician Epoch, The Ordovician
Celestial body · 1
Ordovician → Earth

Important terminology

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

Important terminology

cambrian period sea gondwana silurian years event fauna brachiopods end time appeared land trilobites million organisms extinction diversity life also

Ordovician relationships Subject–Predicate–Object triples

TTTA extracted 129 structured relationships around Ordovician. Examples in this analysis include Ordovician → Celestial body → Earth and Ordovician → Chronological unit → Period. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
OrdovicianCelestial bodyEarth1.00infobox
OrdovicianChronological unitPeriod1.00infobox
OrdovicianFirst proposed byCharles Lapworth, 18791.00infobox
OrdovicianLower boundary definitionFAD of the Conodont Iapetognathus fluctivagus1.00infobox
OrdovicianLower GSSP ratifiedJanuary 2000: 191.00infobox
OrdovicianName formalityFormal1.00infobox
OrdovicianName ratified19601.00infobox
OrdovicianRegional usageGlobal (ICS)1.00infobox
OrdovicianSea level above present day180 m; rising to 220 m in Caradoc and falling sharply to 141 m in end-Ordovician glaciations1.00infobox
OrdovicianStratigraphic unitSystem1.00infobox
OrdovicianTime scale(s) usedICS Time Scale1.00infobox
OrdovicianTime span formalityFormal1.00infobox
OrdovicianUpper boundary definitionFAD of the Graptolite Akidograptus ascensus1.00infobox
OrdovicianUpper boundary GSSPDob's Linn, Moffat, U.K. 55°26′24″N 3°16′12″W / 55.4400°N 3.2700°W / 55.4400; -3.27001.00infobox
OrdovicianUpper GSSP ratified19841.00infobox

Related concept clusters Related term clusters

The concept neighborhoods around Ordovician bring nearby vocabulary together. In this analysis, examples include Cambrian, End and Period. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • fauna
    • Also
    • Organisms
    • Event
    • System
    • Life
    • Sea
    • Many
    • Earth
    • Ordovician
    • Bryozoans
    • Hirnantian
    • Known
  • end of the period
    • Years
    • End
    • Period
    • Million
    • Earth
    • System
    • Glaciation
    • Level
    • Life
    • Ago
    • Extinction
    • Ordovician
  • geologic period
    • Years
    • End
    • Million
    • Earth
    • System
    • Ago
    • Level
    • Silurian
    • Continued
    • Life
    • May
    • Sea
  • cambrian
    • Silurian
    • Ordovician
    • Fauna
    • New
    • Appeared
    • Paleozoic
    • System
    • Ago
    • Continued
    • Known
    • Period
    • Also
  • first terrestrial plants
    • Appeared
    • May
    • Land
    • Period
    • Years
    • Million
    • Earth
    • Ordovician
    • Bryozoans
    • Life
    • Time
    • Brachiopods
  • cambrian explosion
    • Silurian
    • Ordovician
    • Fauna
    • New
    • Appeared
    • Paleozoic
    • System
    • Ago
    • Continued
    • Known
    • Period
    • Also
  • Ordovician
    • Cambrian
    • End
    • Period
    • Sea
    • Years
    • Event
    • Ago
    • Million
    • Appeared
    • Silurian
    • Known
    • Level
  • ordovician
    • Cambrian
    • End
    • Period
    • Sea
    • Years
    • Event
    • Ago
    • Million
    • Appeared
    • Silurian
    • Known
    • Level

Connections between topic areas Semantic bridges

For Ordovician, one of the stronger structural bridges in this analysis connects Ordovician with Life. 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
Ordovician — Life · splits 95 ⟂ 68
Ordovician — Overview · splits 132 ⟂ 31
Ordovician — Paleogeography and tectonics · splits 139 ⟂ 24
Ordovician — End of the period · splits 148 ⟂ 15
Ordovician — Climate and sea level · splits 149 ⟂ 14
Ordovician — Geochemistry · splits 156 ⟂ 7
Ordovician — Subdivisions · splits 160 ⟂ 3

Map overview Semantic statistics

Ordovician

Nodes163
Edges162
Triples129
Avg. degree1.99
Density0.01227
Components1

Source & methodology

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

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

For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.

Monitor your Domain Rating with FrogDR