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Graham A. Logan

Graham A. Logan

University of Chester
United Kingdom

Last Updated:

D-Index & Metrics

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Discipline name D-Index World Ranking National Ranking Publications Citations
Earth Science 36 7045 723 75 9181

Graham A. Logan publications per year

The chart shows the history of publications by Graham A. Logan between 1980 and 2012, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Graham A. Logan published across 33 years, from 1980 to 2012, averaging 2.6 papers a year. Output peaked at 10 publications in 2009. 5 of the 85 publications appeared in the last two years.

No. of publications
2 4 6 8 10
Bar chart. Horizontal axis: year, 1980 to 2012. Vertical axis: number of publications, 0 to 10. Peak 10 publications in 2009. 1980: 1 publication 1981: 0 publications 1982: 0 publications 1983: 0 publications 1984: 0 publications 1985: 0 publications 1986: 0 publications 1987: 0 publications 1988: 0 publications 1989: 0 publications 1990: 0 publications 1991: 1 publication 1992: 1 publication 1993: 2 publications 1994: 1 publication 1995: 3 publications 1996: 1 publication 1997: 3 publications 1998: 1 publication 1999: 7 publications 2000: 1 publication 2001: 4 publications 2002: 3 publications 2003: 8 publications 2004: 7 publications 2005: 4 publications 2006: 5 publications 2007: 6 publications 2008: 6 publications 2009: 10 publications 2010: 5 publications 2011: 3 publications 2012: 2 publications
1980 2012

85 publications in total across all disciplines

View publications per year as a table
Graham A. Logan: publications per year, 1980 to 2012
Year Publications
1980 1
1981 0
1982 0
1983 0
1984 0
1985 0
1986 0
1987 0
1988 0
1989 0
1990 0
1991 1
1992 1
1993 2
1994 1
1995 3
1996 1
1997 3
1998 1
1999 7
2000 1
2001 4
2002 3
2003 8
2004 7
2005 4
2006 5
2007 6
2008 6
2009 10
2010 5
2011 3
2012 2
Total 85
Download as CSV

Graham A. Logan publications per year - data summary

  • Graham A. Logan, a Earth Science scholar from University of Chester, has 85 publications recorded across 33 years, from 1980 to 2012.
  • The oldest publication on record dates to 1980 and the most recent to 2012.
  • The most productive year is 2009, with 10 publications.
  • The least productive years with any output are 1980, 1991, 1992, 1994 and others, with 1 publication each.
  • 10 of the 33 years in the span carry no publications at all (1981, 1982, 1983, 1984 and others).
  • The rate of publication averages 2.6 papers per year over the whole span, or 3.7 per year counting only the 23 years with at least one publication.
  • The last 5 years on the chart (2008-2012) hold 26 publications, 31% of the career total.
  • Split into equal eras - 1980-1990: 1 publication (0.1 per year); 1991-2001: 25 publications (2.3 per year); 2002-2012: 59 publications (5.4 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

Graham A. Logan 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 Graham A. Logan 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, 68–77 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: 75 publications — 3rd percentile

3% 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 75
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
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
Download as CSV

Graham A. Logan publication distribution in Earth Science in 2026 - data summary

  • The chart plots the publication count of all 9,176 Earth Science scientists ranked by Research.com in 2026, grouped into 58 ranges running from 38–47 to 603+ publications.
  • Graham A. Logan, a Earth Science scholar from University of Chester, records 75 publications - the 3rd percentile of the discipline.
  • 3% of ranked Earth Science scientists score the same or lower than Graham A. Logan, and about 97% score higher.
  • The median of the discipline falls in the 168–177 publications range, and Graham A. Logan ranks below the median.
  • The most crowded range is 128–137 publications, holding 557 scientists (6% of the field).
  • 58% of the field sits in the lowest quarter of the value range (up to 178–187 publications), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 603 publications or more, 100 scientists in all (1% of the field).

Graham A. Logan 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 Graham A. Logan 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, 36 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: 36 D-Index — 23rd percentile

23% 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 36
37 366
38 344
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
Download as CSV

Graham A. Logan D-index placement in Earth Science in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 9,176 Earth Science scientists ranked by Research.com in 2026, grouped into 77 ranges running from 30 to 106+ D-Index.
  • Graham A. Logan, a Earth Science scholar from University of Chester, records 36 D-Index - the 23rd percentile of the discipline.
  • 23% of ranked Earth Science scientists score the same or lower than Graham A. Logan, and about 77% score higher.
  • The median of the discipline falls in the 44 D-Index range, and Graham A. Logan ranks below the median.
  • The most crowded range is 36 D-Index, holding 389 scientists (4% of the field).
  • 62% of the field sits in the lowest quarter of the value range (up to 49 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 106 D-Index or more, 98 scientists in all (1% of the field).

Best Publications

  • Archean molecular fossils and the early rise of eukaryotes

    Jochen J. Brocks;Graham A. Logan;Roger Buick;Roger E. Summons

  • 2-Methylhopanoids as biomarkers for cyanobacterial oxygenic photosynthesis

    Roger E. Summons;Linda L. Jahnke;Janet M. Hope;Graham A. Logan

  • Formation of sphalerite (ZnS) deposits in natural biofilms of sulfate-reducing bacteria.

    Matthias Labrenz;Gregory K. Druschel;Tamara Thomsen-Ebert;Benjamin Gilbert

  • Biomarker evidence for green and purple sulphur bacteria in a stratified Palaeoproterozoic sea

    Jochen J. Brocks;Gordon D. Love;Roger E. Summons;Roger E. Summons;Andrew H. Knoll

  • Terminal Proterozoic reorganization of biogeochemical cycles

    Graham A. Logan;J. M. Hayes;Glenn B. Hieshima;Roger E. Summons

  • Barite, BIFs and bugs: evidence for the evolution of the Earth’s early hydrosphere

    David L. Huston;Graham A. Logan

  • A reconstruction of Archean biological diversity based on molecular fossils from the 2.78 to 2.45 billion-year-old Mount Bruce Supergroup, Hamersley Basin, Western Australia

    Jochen J Brocks;Roger Buick;Roger E Summons;Graham A Logan

  • Molecular preservation. Discussion

    Geoffrey Eglinton;Graham A. Logan;R. P. Ambler;J. J. Boon

  • Composition and syngeneity of molecular fossils from the 2.78 to 2.45 billion-year-old Mount Bruce Supergroup, Pilbara Craton, Western Australia

    Jochen J Brocks;Roger Buick;Graham A Logan;Roger E Summons

  • The Impact of Bioturbation on Infaunal Ecology and Evolution During the Proterozoic-Cambrian Transition

    Unknown

  • Lithosphere delamination with foundering of lower crust and mantle caused permanent subsidence of New Caledonia Trough and transient uplift of Lord Howe Rise during Eocene and Oligocene initiation of Tonga‐Kermadec subduction, western Pacific

    Rupert Sutherland;Julien Collot;Yves Lafoy;Graham A. Logan

  • Assessing biomarker syngeneity using branched alkanes with quaternary carbon (BAQCs) and other plastic contaminants

    Jochen J. Brocks;Emmanuelle Grosjean;Graham A. Logan

  • Antarctic deglacial pattern in a 30 kyr record of sea surface temperature offshore South Australia

    Eva María Calvo;Carles Pelejero;Patrick de Deckker;Graham A. Logan

  • Biogeochemistry of the Miocene lacustrine deposit, at Clarkia, northern Idaho, U.S.A.

    Graham A. Logan;Geoffrey Eglinton

  • Release of bound aromatic hydrocarbons from late Archean and mesoproterozoic kerogens via hydropyrolysis

    Jochen J Brocks;Gordon D Love;Colin E Snape;Graham A Logan

  • Dust-induced changes in phytoplankton composition in the Tasman Sea during the last four glacial cycles

    Eva María Calvo;Carles Pelejero;Graham A. Logan;Patrick de Deckker

  • Preservation of fossil leaf waxes in association with their source tissues, Clarkia, northern Idaho, USA

    Graham A. Logan;Charles J. Smiley;Geoffrey Eglinton

  • An isotopic biogeochemical study of Neoproterozoic and Early Cambrian sediments from the Centralian Superbasin, Australia.

    Graham A. Logan;Roger E. Summons;John M. Hayes

  • Terminal Proterozoic mid-shelf benthic microbial mats in the Centralian Superbasin and their environmental significance.

    Graham A. Logan;Clive R. Calver;Paul Gorjan;Roger E. Summons

  • Biogeochemistry of the 1640 Ma McArthur River (HYC) lead-zinc ore and host sediments, Northern Territory, Australia

    Graham A. Logan;Mark C. Hinman;Malcolm R. Walter;Roger E. Summons

Imed Bouchrika, PhD

Data reviewed by: Imed Bouchrika, PhD

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Related Online Degrees & Career Pathways

For students interested in Earth Science, exploring related fields can open diverse career opportunities. Many find that pursuing degrees in specialized areas complements their scientific knowledge. For instance, those fascinated by information management may consider programs like mlis ala accredited programs, which are designed to prepare graduates for roles in library and information science.

When weighing advanced education options, it’s important to evaluate if a program makes sense professionally. Resources like is a masters in library science worth it provide insights into the value and outcomes of such degrees, helping students make informed decisions.

On the creative side, a digital photography degree online can complement Earth Science careers by enhancing skills in documentation, environmental visuals, and research presentations. Additionally, certain options are tailored to support veterans, as seen in military friendly online photography degree programs, ensuring inclusive pathways for all aspiring professionals.

By exploring these related fields and programs, students can enhance their expertise and expand their career horizons beyond traditional Earth Science roles.

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