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Pennsylvanian (geology): Life, Subdivisions & Overview

The Pennsylvanian (/ˌpɛnsəlˈveɪni.ən/ pen-səl-VAYN-i-ən, also known as Upper Carboniferous or Late Carboniferous) is, on the ICS geologic timescale, the younger of two subperiods of the Carboniferous Period (or the upper of two subsystems of the Carboniferous System). It lasted from roughly 323.4 million years ago to 298.9 million years ago. As with most…

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Pennsylvanian (geology) topic overview

The analysis highlights Life, Subdivisions and Overview as prominent areas in the source structure around Pennsylvanian (geology).

Related topics
53
Source areas
3
Connected nodes
56
Extracted relationships
12
Concept neighborhoods
20
Bridge connections
56

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 · 22 topics
Subdivisions · 19 topics
Overview · 12 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
Subperiod
Lower boundary definition
First appearance of the Conodont Declinognathodus nodiliferus.
Lower GSSP ratified
1996
Name formality
Formal
Regional usage
Global (ICS)

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

Life

Subdivisions

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 Pennsylvanian (geology) connects Entity context

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

Pennsylvanian (geology)

Top relations

Celestial body · 1
Pennsylvanian (geology) → Earth
Chronological unit · 1
Pennsylvanian (geology) → Subperiod
Lower boundary definition · 1
Pennsylvanian (geology) → First appearance of the Conodont Declinognathodus nodiliferus.
Lower boundary GSSP · 1
Pennsylvanian (geology) → Arrow Canyon, Nevada, United States .mw-parser-output .geo-default,.mw-parser-output .geo-dms,.mw-parser-output .geo-dec{display:inline}.mw-parser-output .geo-nondefault,.mw-par…
Lower GSSP ratified · 1
Pennsylvanian (geology) → 1996
Name formality · 1
Pennsylvanian (geology) → Formal
Regional usage · 1
Pennsylvanian (geology) → Global (ICS)
Time scale(s) used · 1
Pennsylvanian (geology) → ICS Time Scale
Time span formality · 1
Pennsylvanian (geology) → Formal
Upper boundary definition · 1
Pennsylvanian (geology) → First appearance of the Conodont Streptognathodus isolatus within the morphotype Streptognathodus wabaunsensis chronocline.

Important terminology

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

Important terminology

pennsylvanian carboniferous ics period mississippian years collapse upper ago moscovian beds late rainforest geologic early bashkirian kasimovian time conodont permian

Pennsylvanian (geology) relationships Subject–Predicate–Object triples

TTTA extracted 12 structured relationships around Pennsylvanian (geology). Examples in this analysis include Pennsylvanian (geology) → Celestial body → Earth and Pennsylvanian (geology) → Chronological unit → Subperiod. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
Pennsylvanian (geology)Celestial bodyEarth1.00infobox
Pennsylvanian (geology)Chronological unitSubperiod1.00infobox
Pennsylvanian (geology)Lower boundary definitionFirst appearance of the Conodont Declinognathodus nodiliferus.1.00infobox
Pennsylvanian (geology)Lower boundary GSSPArrow Canyon, Nevada, United States .mw-parser-output .geo-default,.mw-parser-output .geo-dms,.mw-parser-output .geo-dec{display:inline}.mw-parser-output .geo-nondefault,.mw-par…1.00infobox
Pennsylvanian (geology)Lower GSSP ratified19961.00infobox
Pennsylvanian (geology)Name formalityFormal1.00infobox
Pennsylvanian (geology)Regional usageGlobal (ICS)1.00infobox
Pennsylvanian (geology)Time scale(s) usedICS Time Scale1.00infobox
Pennsylvanian (geology)Time span formalityFormal1.00infobox
Pennsylvanian (geology)Upper boundary definitionFirst appearance of the Conodont Streptognathodus isolatus within the morphotype Streptognathodus wabaunsensis chronocline.1.00infobox
Pennsylvanian (geology)Upper boundary GSSPAidaralash, Ural Mountains, Kazakhstan 50°14′45″N 57°53′29″E / 50.2458°N 57.8914°E / 50.2458; 57.89141.00infobox
Pennsylvanian (geology)Upper GSSP ratified19961.00infobox

Related concept clusters Concept neighborhoods

The concept neighborhoods around Pennsylvanian (geology) bring nearby vocabulary together. In this analysis, examples include Carboniferous, Mississippian and Period. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • Pennsylvanian (geology)
    • Carboniferous
    • Mississippian
    • Period
    • Ics
    • Age
    • Beds
    • Geologic
    • Early
    • Late
    • Years
    • Subdivisions
    • Subperiods
  • pennsylvanian (geology)
    • Carboniferous
    • Mississippian
    • Period
    • Ics
    • Age
    • Beds
    • Geologic
    • Early
    • Late
    • Years
    • Subdivisions
    • Subperiods
  • ics
    • Timescale
    • Ago
    • Moscovian
    • Earth
    • Subdivisions
    • Subperiod
    • Subperiods
    • Years
    • Geologic
    • Gzhelian
    • Subdivision
    • Pennsylvanian
  • carboniferous
    • Pennsylvanian
    • Period
    • Late
    • Mississippian
    • Ics
    • Geologic
    • Early
    • Ago
    • Years
    • Subdivisions
    • Subperiods
    • Million
  • geologic timescale
    • Subperiods
    • Timescale
    • Period
    • Mississippian
    • Ics
    • Upper
    • Subdivisions
    • Pennsylvanian
    • Beds
    • Gzhelian
    • Known
    • North
  • collapse of the rainforest ecology
    • Rainforest
    • Tetrapods
    • Moscovian
    • Years
    • Ics
    • Subdivisions
    • Subperiod
    • Earth
    • Gzhelian
    • Permian
    • Subdivision
    • Bashkirian
  • collapse
    • Rainforest
    • Tetrapods
    • Moscovian
    • Ics
    • Years
    • Earth
    • Subdivisions
    • Subperiod
    • End
    • Gzhelian
    • Life
    • Million
  • bashkirian
    • Gzhelian
    • Kasimovian
    • Subdivision
    • Early
    • Corresponds
    • Late
    • Moscovian
    • Ics
    • North
    • Permian
    • Timescale
    • Lower

Connections between topic areas Semantic bridges

For Pennsylvanian (geology), one of the stronger structural bridges in this analysis connects Pennsylvanian (geology) 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
Pennsylvanian (geology) — Life · splits 34 ⟂ 23
Pennsylvanian (geology) — Subdivisions · splits 37 ⟂ 20
Pennsylvanian (geology) — Overview · splits 44 ⟂ 13

Map overview Semantic statistics

Pennsylvanian (geology)

Nodes57
Edges56
Triples12
Avg. degree1.96
Density0.035088
Components1

Source & methodology

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

Source: Wikipedia — Pennsylvanian (geology) · EN edition · Analysis: TopicsToTalkAbout

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