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

Basic class information
Class id #P Avg. number of
references		 Database coverage
of references
3038 2082 63.0 39%


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
13 4 ZOOLOGY//MARINE & FRESHWATER BIOLOGY//FISHERIES 1013533
232 3       PALEONTOLOGY//JOURNAL OF PALEONTOLOGY//GEOLOGY 48747
248 2             PALEONTOLOGY//JOURNAL OF PALEONTOLOGY//LETHAIA 19839
3038 1                   PERMIAN TRIASSIC BOUNDARY//EARLY TRIASSIC//PERMIAN 2082

Terms with highest relevance score


rank Term termType Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with term
in class
1 PERMIAN TRIASSIC BOUNDARY authKW 2032686 8% 86% 161
2 EARLY TRIASSIC authKW 933810 5% 58% 110
3 PERMIAN authKW 920052 14% 21% 294
4 MASS EXTINCTION authKW 690922 8% 30% 157
5 LOWER TRIASSIC authKW 428525 2% 57% 51
6 END PERMIAN MASS EXTINCTION authKW 395162 2% 84% 32
7 BIOTIC RECOVERY authKW 352216 2% 69% 35
8 PERMIAN TRIASSIC authKW 337651 2% 56% 41
9 END PERMIAN authKW 301665 1% 86% 24
10 PALEONTOLOGY WoSSC 286218 50% 2% 1042

Web of Science journal categories


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with term
in class
1 Paleontology 286218 50% 2% 1042
2 Geology 37566 19% 1% 392
3 Geosciences, Multidisciplinary 31930 45% 0% 946
4 Geography, Physical 16940 15% 0% 319
5 Geochemistry & Geophysics 1033 7% 0% 142
6 Multidisciplinary Sciences 147 2% 0% 35
7 Engineering, Petroleum 67 1% 0% 14
8 Mineralogy 34 1% 0% 16
9 Biodiversity Conservation 30 1% 0% 17
10 Evolutionary Biology 29 1% 0% 25

Address terms


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 BIOGEOL ENVIRONM GEOL 169690 3% 19% 62
2 STATE BIOGEOL ENVIRONM GEOL 167818 5% 11% 109
3 NANJING GEOL PALAEONTOL 124124 6% 7% 116
4 MUSEUM PALAEONTOL 118005 1% 62% 13
5 STATE PALAEOBIOL STRATIG 104331 4% 9% 78
6 PALAONTOL MUSEUM 72085 2% 14% 35
7 BIOL ENVIRONM GEOL 69864 0% 53% 9
8 SHILO NORTHEAST INTERDISCIPLINARY SCI 65319 0% 64% 7
9 ECOL ENVIRONM 48923 3% 6% 56
10 GPMR 45823 0% 63% 5

Journals


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 115028 12% 3% 245
2 PALEONTOLOGICAL JOURNAL 71492 4% 6% 83
3 PALEONTOLOGICHESKII ZHURNAL 64329 3% 7% 64
4 PALEONTOLOGICAL RESEARCH 60252 2% 13% 32
5 STRATIGRAPHY AND GEOLOGICAL CORRELATION 55924 3% 6% 59
6 JOURNAL OF PALEONTOLOGY 49371 5% 3% 114
7 RIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA 44141 2% 7% 42
8 JOURNAL OF ASIAN EARTH SCIENCES 29848 4% 2% 82
9 ALCHERINGA 29011 2% 5% 43
10 JOURNAL OF EARTH SCIENCE 20994 2% 4% 34

Author Key Words


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class		 LCSH search Wikipedia search
1 PERMIAN TRIASSIC BOUNDARY 2032686 8% 86% 161 Search PERMIAN+TRIASSIC+BOUNDARY Search PERMIAN+TRIASSIC+BOUNDARY
2 EARLY TRIASSIC 933810 5% 58% 110 Search EARLY+TRIASSIC Search EARLY+TRIASSIC
3 PERMIAN 920052 14% 21% 294 Search PERMIAN Search PERMIAN
4 MASS EXTINCTION 690922 8% 30% 157 Search MASS+EXTINCTION Search MASS+EXTINCTION
5 LOWER TRIASSIC 428525 2% 57% 51 Search LOWER+TRIASSIC Search LOWER+TRIASSIC
6 END PERMIAN MASS EXTINCTION 395162 2% 84% 32 Search END+PERMIAN+MASS+EXTINCTION Search END+PERMIAN+MASS+EXTINCTION
7 BIOTIC RECOVERY 352216 2% 69% 35 Search BIOTIC+RECOVERY Search BIOTIC+RECOVERY
8 PERMIAN TRIASSIC 337651 2% 56% 41 Search PERMIAN+TRIASSIC Search PERMIAN+TRIASSIC
9 END PERMIAN 301665 1% 86% 24 Search END+PERMIAN Search END+PERMIAN
10 CHANGHSINGIAN 283901 1% 88% 22 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.


Rank Reference # ref. in
cl.		 Shr. of ref. in
cl.		 Citations
1 KORTE, C , KOZUR, HW , (2010) CARBON-ISOTOPE STRATIGRAPHY ACROSS THE PERMIAN-TRIASSIC BOUNDARY: A REVIEW.JOURNAL OF ASIAN EARTH SCIENCES. VOL. 39. ISSUE 4. P. 215 -235 168 79% 92
2 ALGEO, TJ , CHEN, ZQ , FRAISER, ML , TWITCHETT, RJ , (2011) TERRESTRIAL-MARINE TELECONNECTIONS IN THE COLLAPSE AND REBUILDING OF EARLY TRIASSIC MARINE ECOSYSTEMS.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY. VOL. 308. ISSUE 1-2. P. 1 -11 119 86% 72
3 WOODS, AD , (2014) ASSESSING EARLY TRIASSIC PALEOCEANOGRAPHIC CONDITIONS VIA UNUSUAL SEDIMENTARY FABRICS AND FEATURES.EARTH-SCIENCE REVIEWS. VOL. 137. ISSUE . P. 6 -18 119 89% 14
4 PAYNE, JL , CLAPHAM, ME , (2012) END-PERMIAN MASS EXTINCTION IN THE OCEANS: AN ANCIENT ANALOG FOR THE TWENTY-FIRST CENTURY?.ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES, VOL 40. VOL. 40. ISSUE . P. 89 -111 101 81% 78
5 SHEN, J , SCHOEPFER, SD , FENG, QL , ZHOU, L , SONG, HY , WEI, HY , ALGEO, TJ , YU, JX , (2015) MARINE PRODUCTIVITY CHANGES DURING THE END-PERMIAN CRISIS AND EARLY TRIASSIC RECOVERY.EARTH-SCIENCE REVIEWS. VOL. 149. ISSUE . P. 136 -162 123 67% 8
6 CHEN, ZQ , YANG, H , LUO, M , BENTON, MJ , KAIHO, K , ZHAO, LS , HUANG, YG , ZHANG, KX , FANG, YH , JIANG, HS , ET AL (2015) COMPLETE BIOTIC AND SEDIMENTARY RECORDS OF THE PERMIAN-TRIASSIC TRANSITION FROM MEISHAN SECTION, SOUTH CHINA: ECOLOGICALLY ASSESSING MASS EXTINCTION AND ITS AFTERMATH.EARTH-SCIENCE REVIEWS. VOL. 149. ISSUE . P. 67 -107 109 77% 2
7 TIAN, L , BOTTJER, DJ , TONG, JN , LI, F , YANG, TL , SONG, HJ , SONG, HY , LIANG, L , (2015) DISTRIBUTION AND SIZE VARIATION OF OOIDS IN THE AFTERMATH OF THE PERMIAN-TRIASSIC MASS EXTINCTION.PALAIOS. VOL. 30. ISSUE 9. P. 714 -727 96 89% 1
8 TIAN, L , TONG, JN , ALGEO, TJ , SONG, HJ , SONG, HY , CHU, DL , SHI, L , BOTTJER, DJ , (2014) RECONSTRUCTION OF EARLY TRIASSIC OCEAN REDOX CONDITIONS BASED ON FRAMBOIDAL PYRITE FROM THE NANPANJIANG BASIN, SOUTH CHINA.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY. VOL. 412. ISSUE . P. 68 -79 92 87% 12
9 FENG, QL , ALGEO, TJ , (2014) EVOLUTION OF OCEANIC REDOX CONDITIONS DURING THE PERMO-TRIASSIC TRANSITION: EVIDENCE FROM DEEPWATER RADIOLARIAN FACIES.EARTH-SCIENCE REVIEWS. VOL. 137. ISSUE . P. 34 -51 102 82% 5
10 ABDOLMALEKI, J , TAVAKOLI, V , (2016) ANACHRONISTIC FACIES IN THE EARLY TRIASSIC SUCCESSIONS OF THE PERSIAN GULF AND ITS PALAEOENVIRONMENTAL RECONSTRUCTION.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY. VOL. 446. ISSUE . P. 213 -224 84 86% 2

Classes with closest relation at Level 1


Rank Class id link
1 19336 RADIOLARIA//SIBUMASU//RADIOLARIANS
2 12968 VISEAN//MISSISSIPPIAN//SERPUKHOVIAN
3 14946 PARANA BASIN//MIOSPORES//PAGANZO BASIN
4 25358 EMEISHAN LARGE IGNEOUS PROVINCE//EMEISHAN//SW CHINA
5 7539 CARNIAN//CARBONATE PLATFORM//UPPER TRIASSIC
6 18183 TRIASSIC JURASSIC BOUNDARY//CENTRAL ATLANTIC MAGMATIC PROVINCE//TRIASSIC JURASSIC
7 37638 CALGARY ADV TECHNOL 120//BULLETIN OF CANADIAN PETROLEUM GEOLOGY//ACOUSTIC COUPLING FACTOR STRUCTURE FACTOR
8 35435 GIONYAMA FORMATION//PROCEEDINGS OF THE JAPAN ACADEMY SERIES B-PHYSICAL AND BIOLOGICAL SCIENCES//CUMMINGELLA
9 18525 BRACHIOPODA//BRACHIOPODS//RECENT BRACHIOPODS
10 5245 PALEOBIOLOGY//MACROEVOLUTION//PALEONTOLOGY

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