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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Earth Science 38 6505 6026 677 630 160 5416

John E. A. Marshall publications per year

The chart shows the history of publications by John E. A. Marshall between 1980 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. John E. A. Marshall published across 46 years, from 1980 to 2025, averaging 4.2 papers a year. Output peaked at 17 publications in 2022. 11 of the 193 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1980 to 2025. Vertical axis: number of publications, 0 to 17. Peak 17 publications in 2022. 1980: 2 publications 1981: 1 publication 1982: 1 publication 1983: 0 publications 1984: 0 publications 1985: 1 publication 1986: 0 publications 1987: 0 publications 1988: 6 publications 1989: 1 publication 1990: 0 publications 1991: 2 publications 1992: 2 publications 1993: 1 publication 1994: 3 publications 1995: 6 publications 1996: 2 publications 1997: 2 publications 1998: 4 publications 1999: 2 publications 2000: 6 publications 2001: 1 publication 2002: 2 publications 2003: 2 publications 2004: 8 publications 2005: 1 publication 2006: 3 publications 2007: 4 publications 2008: 5 publications 2009: 1 publication 2010: 1 publication 2011: 10 publications 2012: 6 publications 2013: 1 publication 2014: 4 publications 2015: 7 publications 2016: 9 publications 2017: 7 publications 2018: 8 publications 2019: 11 publications 2020: 9 publications 2021: 9 publications 2022: 17 publications 2023: 14 publications 2024: 9 publications 2025: 2 publications
1980 2025

193 publications in total across all disciplines

View publications per year as a table
John E. A. Marshall: publications per year, 1980 to 2025
Year Publications
1980 2
1981 1
1982 1
1983 0
1984 0
1985 1
1986 0
1987 0
1988 6
1989 1
1990 0
1991 2
1992 2
1993 1
1994 3
1995 6
1996 2
1997 2
1998 4
1999 2
2000 6
2001 1
2002 2
2003 2
2004 8
2005 1
2006 3
2007 4
2008 5
2009 1
2010 1
2011 10
2012 6
2013 1
2014 4
2015 7
2016 9
2017 7
2018 8
2019 11
2020 9
2021 9
2022 17
2023 14
2024 9
2025 2
Total 193
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John E. A. Marshall publication distribution in Earth Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Earth Science in 2026. The highlighted bar marks where John E. A. Marshall sits on this spectrum.

No. of scientists
100 200 300 400 500
Bar chart with 58 bars. Horizontal axis: publications, 38–47 to 603+. Vertical axis: number of scientists, 0 to 557. Most scientists, 557, have 128–137 publications. The last bar groups every scientist with 603 publications or more. The highlighted bar, 158–167 publications, is where this scientist sits. 38–47 publications: 5 scientists 48–57 publications: 33 scientists 58–67 publications: 94 scientists 68–77 publications: 161 scientists 78–87 publications: 278 scientists 88–97 publications: 376 scientists 98–107 publications: 404 scientists 108–117 publications: 484 scientists 118–127 publications: 540 scientists 128–137 publications: 557 scientists 138–147 publications: 491 scientists 148–157 publications: 495 scientists 158–167 publications: 458 scientists 168–177 publications: 490 scientists 178–187 publications: 414 scientists 188–197 publications: 401 scientists 198–207 publications: 333 scientists 208–217 publications: 292 scientists 218–227 publications: 290 scientists 228–237 publications: 262 scientists 238–247 publications: 243 scientists 248–257 publications: 208 scientists 258–267 publications: 185 scientists 268–277 publications: 147 scientists 278–287 publications: 128 scientists 288–297 publications: 119 scientists 298–307 publications: 120 scientists 308–317 publications: 107 scientists 318–327 publications: 93 scientists 328–337 publications: 87 scientists 338–347 publications: 64 scientists 348–357 publications: 87 scientists 358–367 publications: 60 scientists 368–377 publications: 60 scientists 378–387 publications: 34 scientists 388–397 publications: 50 scientists 398–407 publications: 44 scientists 408–417 publications: 31 scientists 418–427 publications: 39 scientists 428–437 publications: 27 scientists 438–447 publications: 36 scientists 448–457 publications: 27 scientists 458–467 publications: 29 scientists 468–477 publications: 30 scientists 478–487 publications: 19 scientists 488–497 publications: 15 scientists 498–507 publications: 18 scientists 508–517 publications: 19 scientists 518–527 publications: 16 scientists 528–537 publications: 10 scientists 538–547 publications: 11 scientists 548–557 publications: 14 scientists 558–567 publications: 11 scientists 568–577 publications: 7 scientists 578–587 publications: 14 scientists 588–597 publications: 5 scientists 598–602 publications: 4 scientists 603+ publications: 100 scientists
38–47 publications 603+

This scientist: 160 publications — 44th percentile

44% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 603 publications or more.

View publications distribution as a table
Number of Earth Science scientists by publication count, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
Publications Scientists This scientist
38–47 5
48–57 33
58–67 94
68–77 161
78–87 278
88–97 376
98–107 404
108–117 484
118–127 540
128–137 557
138–147 491
148–157 495
158–167 458 160
168–177 490
178–187 414
188–197 401
198–207 333
208–217 292
218–227 290
228–237 262
238–247 243
248–257 208
258–267 185
268–277 147
278–287 128
288–297 119
298–307 120
308–317 107
318–327 93
328–337 87
338–347 64
348–357 87
358–367 60
368–377 60
378–387 34
388–397 50
398–407 44
408–417 31
418–427 39
428–437 27
438–447 36
448–457 27
458–467 29
468–477 30
478–487 19
488–497 15
498–507 18
508–517 19
518–527 16
528–537 10
538–547 11
548–557 14
558–567 11
568–577 7
578–587 14
588–597 5
598–602 4
603+ 100
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John E. A. Marshall D-index placement in Earth Science in 2026

The chart shows the D-index (discipline H-index) distribution of Earth Science scientists ranked by Research.com in 2026. The highlighted bar marks where John E. A. Marshall sits on this spectrum.

No. of scientists
100 200 300
Bar chart with 77 bars. Horizontal axis: D-Index, 30 to 106+. Vertical axis: number of scientists, 0 to 389. Most scientists, 389, have 36 D-Index. The last bar groups every scientist with 106 D-Index or more. The highlighted bar, 38 D-Index, is where this scientist sits. 30 D-Index: 144 scientists 31 D-Index: 215 scientists 32 D-Index: 278 scientists 33 D-Index: 379 scientists 34 D-Index: 366 scientists 35 D-Index: 372 scientists 36 D-Index: 389 scientists 37 D-Index: 366 scientists 38 D-Index: 344 scientists 39 D-Index: 349 scientists 40 D-Index: 296 scientists 41 D-Index: 289 scientists 42 D-Index: 277 scientists 43 D-Index: 279 scientists 44 D-Index: 248 scientists 45 D-Index: 257 scientists 46 D-Index: 212 scientists 47 D-Index: 202 scientists 48 D-Index: 207 scientists 49 D-Index: 204 scientists 50 D-Index: 183 scientists 51 D-Index: 178 scientists 52 D-Index: 182 scientists 53 D-Index: 178 scientists 54 D-Index: 163 scientists 55 D-Index: 117 scientists 56 D-Index: 163 scientists 57 D-Index: 120 scientists 58 D-Index: 113 scientists 59 D-Index: 136 scientists 60 D-Index: 135 scientists 61 D-Index: 96 scientists 62 D-Index: 103 scientists 63 D-Index: 83 scientists 64 D-Index: 103 scientists 65 D-Index: 83 scientists 66 D-Index: 89 scientists 67 D-Index: 92 scientists 68 D-Index: 89 scientists 69 D-Index: 78 scientists 70 D-Index: 75 scientists 71 D-Index: 53 scientists 72 D-Index: 62 scientists 73 D-Index: 54 scientists 74 D-Index: 35 scientists 75 D-Index: 52 scientists 76 D-Index: 50 scientists 77 D-Index: 32 scientists 78 D-Index: 37 scientists 79 D-Index: 20 scientists 80 D-Index: 33 scientists 81 D-Index: 36 scientists 82 D-Index: 34 scientists 83 D-Index: 34 scientists 84 D-Index: 24 scientists 85 D-Index: 19 scientists 86 D-Index: 18 scientists 87 D-Index: 26 scientists 88 D-Index: 30 scientists 89 D-Index: 17 scientists 90 D-Index: 21 scientists 91 D-Index: 19 scientists 92 D-Index: 15 scientists 93 D-Index: 14 scientists 94 D-Index: 20 scientists 95 D-Index: 9 scientists 96 D-Index: 10 scientists 97 D-Index: 15 scientists 98 D-Index: 13 scientists 99 D-Index: 3 scientists 100 D-Index: 13 scientists 101 D-Index: 3 scientists 102 D-Index: 9 scientists 103 D-Index: 4 scientists 104 D-Index: 6 scientists 105 D-Index: 6 scientists 106+ D-Index: 98 scientists
30 D-Index 106+

This scientist: 38 D-Index — 31st percentile

31% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 106 D-Index or more.

View D-Index distribution as a table
Number of Earth Science scientists by D-index, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
D-Index Scientists This scientist
30 144
31 215
32 278
33 379
34 366
35 372
36 389
37 366
38 344 38
39 349
40 296
41 289
42 277
43 279
44 248
45 257
46 212
47 202
48 207
49 204
50 183
51 178
52 182
53 178
54 163
55 117
56 163
57 120
58 113
59 136
60 135
61 96
62 103
63 83
64 103
65 83
66 89
67 92
68 89
69 78
70 75
71 53
72 62
73 54
74 35
75 52
76 50
77 32
78 37
79 20
80 33
81 36
82 34
83 34
84 24
85 19
86 18
87 26
88 30
89 17
90 21
91 19
92 15
93 14
94 20
95 9
96 10
97 15
98 13
99 3
100 13
101 3
102 9
103 4
104 6
105 6
106+ 98
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Overview

John E. A. Marshall is affiliated with the University of Southampton in the United Kingdom and works primarily in the field of Earth and Planetary Sciences. Their research spans several subfields, including Paleontology, Atmospheric Science, Geology, Mechanics of Materials, and Ecology. The main topics addressed in their work include Paleontology and Stratigraphy of Fossils, Geology and Paleoclimatology Research, Hydrocarbon Exploration and Reservoir Analysis, Geological Studies and Exploration, Plant Diversity and Evolution, Geological and Geochemical Analysis, and Isotope Analysis in Ecology.

Their recent publications demonstrate a focus on paleoclimate, extinction events, and terrestrial ecosystem evolution. Key papers include:

  • "UV-B radiation was the Devonian-Carboniferous boundary terrestrial extinction kill mechanism" (2020, Science Advances)
  • "The Devonian landscape factory: plant-sediment interactions in the Old Red Sandstone of Svalbard and the rise of vegetation as a biogeomorphic agent" (2021, Journal of the Geological Society)
  • "Dying in the Sun: Direct evidence for elevated UV-B radiation at the end-Permian mass extinction" (2023, Science Advances)
  • "Low tropical diversity during the adaptive radiation of early land plants" (2022, Nature Plants)
  • "Enhanced terrestrial nutrient release during the Devonian emergence and expansion of forests: Evidence from lacustrine phosphorus and geochemical records" (2022, Geological Society of America Bulletin)

John E. A. Marshall frequently collaborates with several researchers, including Jessica H. Whiteside, Gabriel Filippelli, William Gilhooly, Huiping Peng, and Calum P. Fox. These collaborations reflect interdisciplinary efforts that integrate geology, paleontology, and environmental sciences.

Their work has been published repeatedly in notable scientific venues, with recurring contributions to:

  • Palaeogeography Palaeoclimatology Palaeoecology
  • Abstracts with programs - Geological Society of America
  • Science Advances
  • Journal of Vertebrate Paleontology
  • Review of Palaeobotany and Palynology

Best Publications

  • Are we now living in the Anthropocene

    Jan Zalasiewicz;Mark Williams;Alan Smith;Tiffany L. Barry

  • Stratigraphy of the Anthropocene

    J Zalasiewicz;M Williams;R Fortey;Alan Smith

  • The Falkland Islands: A key element in Gondwana paleogeography

    J. E. A. Marshall

  • Constraints on the numerical age of the Paleocene‐Eocene boundary

    Adam J. Charles;Daniel J. Condon;Ian C. Harding;Heiko Pälike

  • Integrated stratigraphy of the Kimmeridge Clay Formation (Upper Jurassic) based on exposures and boreholes in south Dorset, UK

    Helen S. Morgans-Bell;Angela L. Coe;Stephen P. Hesselbo;Hugh C. Jenkyns

  • A preliminary assessment of the hydrocarbon potential of the Larsen basin, Antarctica

    D.I.M. Macdonald;P.F. Barker;S.W. Garrett;J.R. Ineson

  • The thermal evolution of sporopollenin

    B.L. Yule;S. Roberts;J.E.A. Marshall

  • Sea-level and salinity fluctuations during the Paleocene–Eocene thermal maximum in Arctic Spitsbergen

    Ian C. Harding;Adam J. Charles;John E.A. Marshall;Heiko Pälike

  • Lycopsid forests in the early Late Devonian paleoequatorial zone of Svalbard

    Christopher Mark Berry;John E. A. Marshall

  • Mid-Devonian archaeopteris roots signal revolutionary change in earliest fossil forests

    William E. Stein;Christopher M. Berry;Jennifer L. Morris;Linda VanAller Hernick

  • Earliest Carboniferous tetrapod and arthropod faunas from Scotland populate Romer's Gap

    Timothy R. Smithson;Stanley P. Wood;John E. A. Marshall;Jennifer A. Clack

  • Simplifying the stratigraphy of time

    Jan Zalasiewicz;Alan Smith;Patrick Brenchley;Jane Evans

  • Investigating Devonian trees as geo‐engineers of past climates: linking palaeosols to palaeobotany and experimental geobiology

    Jennifer L. Morris;Jonathan R. Leake;William E. Stein;Christopher M. Berry

  • Phylogenetic and environmental context of a Tournaisian tetrapod fauna

    Jennifer A. Clack;Carys E. Bennett;David K. Carpenter;Sarah J. Davies

  • Greenhouse to icehouse: a biostratigraphic review of latest Devonian-Mississippian glaciations and their global effects

    J. A. Lakin;J. E. A. Marshall;I. Troth;I. C. Harding

  • The age, fauna and palaeoenvironment of the Late Triassic fissure deposits of Tytherington, South Gloucestershire, UK

    D. I. Whiteside;J. E. A. Marshall

  • UV-B radiation was the Devonian-Carboniferous boundary terrestrial extinction kill mechanism

    John E. A. Marshall;Jon Lakin;Ian Troth;Sarah M. Wallace-Johnson

  • Short Paper: Devonian and later movements on the Great Glen fault system, Scotland

    D. A. Rogers;J. E. A. Marshall;T. R. Astin

  • Was the latest Devonian glaciation a multiple event? New palynological evidence from Bolivia

    Reed Wicander;Geoff Clayton;J.E.A. Marshall;Ian Troth;Ian Troth

  • Dinosteranes (4,23,24-trimethylsteranes) and other biological markers in dinoglagellate-rich marine sediments of Rhaetian age

    J.B. Thomas;J. Marshall;A.L. Mann;R.E. Summons

Frequent Co-Authors

Peter F. Rawson
Peter F. Rawson University College London
Andrew S. Gale
Andrew S. Gale University of Portsmouth
Jennifer A. Clack
Jennifer A. Clack University of Cambridge
Jan Zalasiewicz
Jan Zalasiewicz University of Leicester
Philip L. Gibbard
Philip L. Gibbard University of Cambridge
Paul R. Bown
Paul R. Bown University College London
Tiffany L. Barry
Tiffany L. Barry University of Leicester
Colin N. Waters
Colin N. Waters University of Leicester
Angela L. Coe
Angela L. Coe The Open University
Mark Williams
Mark Williams University of Leicester

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