Class information for:
Level 1: PERMIAN TRIASSIC BOUNDARY//PERMIAN//EARLY TRIASSIC

Basic class information
Bar chart of Publication_year

Last years might be incomplete

Hierarchy of classes
The table includes all classes above and classes immediately below the current class.


Cluster id Level Cluster label #P
11 4 ECOLOGY//ZOOLOGY//MARINE & FRESHWATER BIOLOGY 1214215
313 3       PALEONTOLOGY//JOURNAL OF PALEONTOLOGY//PALAEONTOLOGY 39731
300 2             PALEONTOLOGY//JOURNAL OF PALEONTOLOGY//ORDOVICIAN 18876
2563 1                   PERMIAN TRIASSIC BOUNDARY//PERMIAN//EARLY TRIASSIC 2240

Terms with highest relevance score


rank Category termType chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 PERMIAN TRIASSIC BOUNDARY authKW 2011995 7% 86% 167
2 PERMIAN authKW 1084170 15% 23% 331
3 EARLY TRIASSIC authKW 962802 5% 59% 117
4 MASS EXTINCTION authKW 703827 7% 30% 165
5 END PERMIAN MASS EXTINCTION authKW 423998 2% 84% 36
6 LOWER TRIASSIC authKW 397687 2% 55% 51
7 PERMIAN TRIASSIC authKW 379806 2% 60% 45
8 BIOTIC RECOVERY authKW 363362 2% 70% 37
9 END PERMIAN authKW 316997 1% 87% 26
10 CHANGHSINGIAN authKW 311661 1% 92% 24

Web of Science journal categories


chi_square_rank Category chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 Paleontology 297660 49% 2% 1102
2 Geology 44185 20% 1% 440
3 Geosciences, Multidisciplinary 36491 47% 0% 1048
4 Geography, Physical 19520 16% 0% 357
5 Geochemistry & Geophysics 1031 7% 0% 147
6 Multidisciplinary Sciences 176 2% 0% 40
7 Engineering, Petroleum 83 1% 0% 16
8 Evolutionary Biology 39 1% 0% 29
9 Biodiversity Conservation 30 1% 0% 18
10 Mineralogy 30 1% 0% 16

Address terms


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 STATE BIOGEOL ENVIRONM GEOL 178139 5% 10% 122
2 BIOGEOL ENVIRONM GEOL 162785 3% 19% 62
3 PERMIAN 158260 1% 75% 15
4 MUSEUM PALAEONTOL 125325 1% 64% 14
5 NANJING GEOL PALAEONTOL 114066 5% 7% 118
6 STATE PALAEOBIOL STRATIG 99634 4% 9% 82
7 PALAONTOL MUSEUM 78370 2% 15% 38
8 BIOL ENVIRONM GEOL 67022 0% 53% 9
9 SHILO NORTHEAST INTERDISCIPLINARY SCI 53020 0% 54% 7
10 SEDIMENTARY GEOL GRP 50641 0% 60% 6

Journals


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 135398 12% 4% 275
2 STRATIGRAPHY AND GEOLOGICAL CORRELATION 67202 3% 7% 67
3 PALEONTOLOGICAL RESEARCH 66968 2% 13% 36
4 RIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA 64686 2% 9% 53
5 JOURNAL OF PALEONTOLOGY 55992 6% 3% 125
6 GEOARABIA 55758 1% 14% 29
7 PALEONTOLOGICAL JOURNAL 41030 3% 4% 66
8 ALCHERINGA 34801 2% 5% 49
9 PALEONTOLOGICHESKII ZHURNAL 32796 2% 5% 47
10 JOURNAL OF ASIAN EARTH SCIENCES 26184 4% 2% 81

Author Key Words


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass LCSH search Wikipedia search
1 PERMIAN TRIASSIC BOUNDARY 2011995 7% 86% 167 Search PERMIAN+TRIASSIC+BOUNDARY Search PERMIAN+TRIASSIC+BOUNDARY
2 PERMIAN 1084170 15% 23% 331 Search PERMIAN Search PERMIAN
3 EARLY TRIASSIC 962802 5% 59% 117 Search EARLY+TRIASSIC Search EARLY+TRIASSIC
4 MASS EXTINCTION 703827 7% 30% 165 Search MASS+EXTINCTION Search MASS+EXTINCTION
5 END PERMIAN MASS EXTINCTION 423998 2% 84% 36 Search END+PERMIAN+MASS+EXTINCTION Search END+PERMIAN+MASS+EXTINCTION
6 LOWER TRIASSIC 397687 2% 55% 51 Search LOWER+TRIASSIC Search LOWER+TRIASSIC
7 PERMIAN TRIASSIC 379806 2% 60% 45 Search PERMIAN+TRIASSIC Search PERMIAN+TRIASSIC
8 BIOTIC RECOVERY 363362 2% 70% 37 Search BIOTIC+RECOVERY Search BIOTIC+RECOVERY
9 END PERMIAN 316997 1% 87% 26 Search END+PERMIAN Search END+PERMIAN
10 CHANGHSINGIAN 311661 1% 92% 24 Search CHANGHSINGIAN Search CHANGHSINGIAN

Core articles
The table includes core articles in the class. The following variables is taken into account for the relevance score of an article in a cluster c:
(1) Number of references referring to publications in the class.
(2) Share of total number of active references referring to publications in the class.
(3) Age of the article. New articles get higher score than old articles.
(4) Citation rate, normalized to year.

Classes with closest relation at Level 1


rank cluster_id2 link
1 9258 TRIASSIC JURASSIC BOUNDARY//TRIASSIC//RHAETIAN
2 10630 MISSISSIPPIAN//VISEAN//SERPUKHOVIAN
3 27258 RADIOLARIA//GIONYAMA FORMATION//TYPES OF SYMMETRY
4 11773 MIOSPORES//PARANA BASIN//PAGANZO BASIN
5 22114 TECHNOL DEV SUPPORT UNIT//GEOL GEOPHYS ERVOIR ENGN GRPMINATO KU//MODERN BRACHIOPOD CALCITE
6 23481 MAIMECHA KOTUI PROVINCE//ONE VELOCITY BUBBLE HYDRODYNAMICS//MEIMECHITE
7 5021 PALEOBIOLOGY//PALEONTOLOGY//MACROEVOLUTION
8 26943 ISOETES//ISOETACEAE//QUILLWORT
9 6165 PENNSYLVANIAN//REVIEW OF PALAEOBOTANY AND PALYNOLOGY//PALAEOBIOL PALAEOECOL
10 8787 FRASNIAN//DEVONIAN//LATE DEVONIAN

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