Class information for:
Level 1: ORDOVICIAN//GRAPTOLITES//SILURIAN

Basic class information
Class id #P Avg. number of
references		 Database coverage
of references
1017 2901 56.7 27%


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
1017 1                   ORDOVICIAN//GRAPTOLITES//SILURIAN 2901

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 ORDOVICIAN authKW 2243500 17% 44% 490
2 GRAPTOLITES authKW 2044841 8% 84% 232
3 SILURIAN authKW 1517167 11% 43% 333
4 CHITINOZOANS authKW 965485 3% 92% 100
5 HIRNANTIAN authKW 671521 2% 90% 71
6 PALEONTOLOGY WoSSC 513636 57% 3% 1647
7 ACRITARCHS authKW 500931 4% 45% 106
8 CONODONTS authKW 476511 6% 26% 175
9 LLANDOVERY authKW 475897 2% 73% 62
10 LATE ORDOVICIAN authKW 394002 2% 59% 63

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 513636 57% 3% 1647
2 Geology 41163 17% 1% 485
3 Geosciences, Multidisciplinary 34982 40% 0% 1173
4 Geography, Physical 4565 7% 0% 200
5 Plant Sciences 148 5% 0% 139
6 Biodiversity Conservation 86 1% 0% 31
7 Engineering, Petroleum 58 1% 0% 16
8 Evolutionary Biology 28 1% 0% 31
9 Geochemistry & Geophysics 21 1% 0% 43
10 Multidisciplinary Sciences 3 0% 0% 13

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 NANJING GEOL PALAEONTOL 198162 6% 11% 173
2 EARTH HIST 149698 1% 68% 21
3 STATE PALAEOBIOL STRATIG 113400 3% 11% 96
4 GEOL MUSEUM 97424 2% 14% 66
5 HGRP PALAOUMWELT 93663 1% 28% 32
6 GEOL 83629 25% 1% 731
7 UNIT PALAEONTOL 70113 1% 22% 30
8 ECOSTRATIG PALAEOBIOL 66097 1% 37% 17
9 SN5 65767 0% 63% 10
10 HIST GEOL 57871 0% 50% 11

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 GFF 328802 6% 19% 161
2 ESTONIAN JOURNAL OF EARTH SCIENCES 295733 3% 33% 84
3 LETHAIA 140807 5% 10% 136
4 PALAEONTOLOGY 136836 6% 8% 164
5 JOURNAL OF PALEONTOLOGY 110257 7% 5% 201
6 GEOLOGICAL MAGAZINE 92692 5% 7% 133
7 ALCHERINGA 72121 3% 9% 80
8 REVIEW OF PALAEOBOTANY AND PALYNOLOGY 62612 5% 5% 131
9 BULLETIN OF GEOSCIENCES 59345 2% 12% 48
10 GEOLOGICAL JOURNAL 54826 3% 7% 75

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 ORDOVICIAN 2243500 17% 44% 490 Search ORDOVICIAN Search ORDOVICIAN
2 GRAPTOLITES 2044841 8% 84% 232 Search GRAPTOLITES Search GRAPTOLITES
3 SILURIAN 1517167 11% 43% 333 Search SILURIAN Search SILURIAN
4 CHITINOZOANS 965485 3% 92% 100 Search CHITINOZOANS Search CHITINOZOANS
5 HIRNANTIAN 671521 2% 90% 71 Search HIRNANTIAN Search HIRNANTIAN
6 ACRITARCHS 500931 4% 45% 106 Search ACRITARCHS Search ACRITARCHS
7 CONODONTS 476511 6% 26% 175 Search CONODONTS Search CONODONTS
8 LLANDOVERY 475897 2% 73% 62 Search LLANDOVERY Search LLANDOVERY
9 LATE ORDOVICIAN 394002 2% 59% 63 Search LATE+ORDOVICIAN Search LATE+ORDOVICIAN
10 UPPER ORDOVICIAN 372888 2% 56% 63 Search UPPER+ORDOVICIAN Search UPPER+ORDOVICIAN

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 MUNNECKE, A , CALNER, M , HARPER, DAT , SERVAIS, T , (2010) ORDOVICIAN AND SILURIAN SEA-WATER CHEMISTRY, SEA LEVEL, AND CLIMATE: A SYNOPSIS.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY. VOL. 296. ISSUE 3-4. P. 389 -413 141 70% 67
2 MELCHIN, MJ , MITCHELL, CE , HOLMDEN, C , STORCH, P , (2013) ENVIRONMENTAL CHANGES IN THE LATE ORDOVICIANEARLY SILURIAN: REVIEW AND NEW INSIGHTS FROM BLACK SHALES AND NITROGEN ISOTOPES.GEOLOGICAL SOCIETY OF AMERICA BULLETIN. VOL. 125. ISSUE 11-12. P. 1635 -1670 149 59% 33
3 RASMUSSEN, CMO , HARPER, DAT , (2011) DID THE AMALGAMATION OF CONTINENTS DRIVE THE END ORDOVICIAN MASS EXTINCTIONS?.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY. VOL. 311. ISSUE 1-2. P. 48 -62 114 84% 10
4 SERVAIS, T , ACHAB, A , ASSELIN, E , (2013) EIGHTY YEARS OF CHITINOZOAN RESEARCH: FROM ALFRED EISENACK TO FLORENTIN PARIS.REVIEW OF PALAEOBOTANY AND PALYNOLOGY. VOL. 197. ISSUE . P. 205 -217 96 86% 1
5 SERVAIS, T , ACHAB, A , ASSELIN, E , (2013) REPRINT OF 'EIGHTY YEARS OF CHITINOZOAN RESEARCH: FROM ALFRED EISENACK TO FLORENTIN PARIS'.REVIEW OF PALAEOBOTANY AND PALYNOLOGY. VOL. 198. ISSUE . P. 2 -13 96 86% 0
6 ALGEO, TJ , MARENCO, PJ , SALTZMAN, MR , (2016) CO-EVOLUTION OF OCEANS, CLIMATE, AND THE BIOSPHERE DURING THE 'ORDOVICIAN REVOLUTION': A REVIEW.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY. VOL. 458. ISSUE . P. 1 -11 103 61% 2
7 BERGSTROM, SM , ERIKSSON, ME , YOUNG, SA , AHLBERG, P , SCHMITZ, B , (2014) HIRNANTIAN (LATEST ORDOVICIAN) DELTA C-13 CHEMOSTRATIGRAPHY IN SOUTHERN SWEDEN AND GLOBALLY: A REFINED INTEGRATION WITH THE GRAPTOLITE AND CONODONT ZONE SUCCESSIONS.GFF. VOL. 136. ISSUE 2. P. 355 -386 67 93% 11
8 RASMUSSEN, CMO , HARPER, DAT , (2011) INTERROGATION OF DISTRIBUTIONAL DATA FOR THE END ORDOVICIAN CRISIS INTERVAL: WHERE DID DISASTER STRIKE?.GEOLOGICAL JOURNAL. VOL. 46. ISSUE 5. P. 478 -500 80 87% 7
9 ZALASIEWICZ, JA , TAYLOR, L , RUSHTON, AWA , LOYDELL, DK , RICKARDS, RB , WILLIAMS, M , (2009) GRAPTOLITES IN BRITISH STRATIGRAPHY.GEOLOGICAL MAGAZINE. VOL. 146. ISSUE 6. P. 785 -850 72 87% 69
10 MALETZ, J , (2014) THE CLASSIFICATION OF THE PTEROBRANCHIA (CEPHALODISCIDA AND GRAPTOLITHINA).BULLETIN OF GEOSCIENCES. VOL. 89. ISSUE 3. P. 477 -540 74 80% 7

Classes with closest relation at Level 1


Rank Class id link
1 4984 TRILOBITES//TRILOBITA//CAMBRIAN
2 15772 TABULATA//ARCHAEOCYATHA//ARCHAEOCYATHS
3 28919 ROSTROCONCHIA//NEPIOMORPHIA//CONOCARDIIDA
4 35435 GIONYAMA FORMATION//PROCEEDINGS OF THE JAPAN ACADEMY SERIES B-PHYSICAL AND BIOLOGICAL SCIENCES//CUMMINGELLA
5 7640 FRASNIAN//DEVONIAN//LATE DEVONIAN
6 12593 CRYPTOSPORES//EARLY LAND PLANTS//CLADOXYLOPSIDA
7 5245 PALEOBIOLOGY//MACROEVOLUTION//PALEONTOLOGY
8 7140 SCOTTISH JOURNAL OF GEOLOGY//JOURNAL OF THE GEOLOGICAL SOCIETY//DALRADIAN
9 6878 BURGESS SHALE//EARLY LIFE//CAMBRIAN
10 28775 UNIT PALAEONTOL GEOL PEDOL//BRABANT MASSIF//ANGLO BRABANT FOLD BELT

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