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Lloyd R. Snowdon

Lloyd R. Snowdon

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Earth Science 39 6060 5611 309 281 231 6982

Lloyd R. Snowdon publications per year

The chart shows the history of publications by Lloyd R. Snowdon between 1970 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Lloyd R. Snowdon published across 56 years, from 1970 to 2025, averaging 4.3 papers a year. Output peaked at 15 publications in 1988. 2 of the 239 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1970 to 2025. Vertical axis: number of publications, 0 to 15. Peak 15 publications in 1988. 1970: 1 publication 1971: 1 publication 1972: 1 publication 1973: 2 publications 1974: 1 publication 1975: 3 publications 1976: 0 publications 1977: 0 publications 1978: 4 publications 1979: 4 publications 1980: 2 publications 1981: 1 publication 1982: 3 publications 1983: 0 publications 1984: 3 publications 1985: 4 publications 1986: 7 publications 1987: 5 publications 1988: 15 publications 1989: 8 publications 1990: 11 publications 1991: 10 publications 1992: 13 publications 1993: 6 publications 1994: 7 publications 1995: 8 publications 1996: 6 publications 1997: 9 publications 1998: 11 publications 1999: 9 publications 2000: 9 publications 2001: 5 publications 2002: 3 publications 2003: 2 publications 2004: 4 publications 2005: 4 publications 2006: 1 publication 2007: 4 publications 2008: 4 publications 2009: 2 publications 2010: 6 publications 2011: 1 publication 2012: 5 publications 2013: 1 publication 2014: 2 publications 2015: 0 publications 2016: 4 publications 2017: 2 publications 2018: 5 publications 2019: 11 publications 2020: 4 publications 2021: 2 publications 2022: 0 publications 2023: 1 publication 2024: 1 publication 2025: 1 publication
1970 2025

239 publications in total across all disciplines

View publications per year as a table
Lloyd R. Snowdon: publications per year, 1970 to 2025
Year Publications
1970 1
1971 1
1972 1
1973 2
1974 1
1975 3
1976 0
1977 0
1978 4
1979 4
1980 2
1981 1
1982 3
1983 0
1984 3
1985 4
1986 7
1987 5
1988 15
1989 8
1990 11
1991 10
1992 13
1993 6
1994 7
1995 8
1996 6
1997 9
1998 11
1999 9
2000 9
2001 5
2002 3
2003 2
2004 4
2005 4
2006 1
2007 4
2008 4
2009 2
2010 6
2011 1
2012 5
2013 1
2014 2
2015 0
2016 4
2017 2
2018 5
2019 11
2020 4
2021 2
2022 0
2023 1
2024 1
2025 1
Total 239
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Lloyd R. Snowdon 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 Lloyd R. Snowdon 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, 228–237 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: 231 publications — 73rd percentile

73% 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
168–177 490
178–187 414
188–197 401
198–207 333
208–217 292
218–227 290
228–237 262 231
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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Lloyd R. Snowdon 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 Lloyd R. Snowdon 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, 39 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: 39 D-Index — 35th percentile

35% 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
39 349 39
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

Lloyd R. Snowdon is affiliated with the University of Calgary in Canada. Their academic contributions focus primarily on the field of Engineering with a strong emphasis on subfields such as Ocean Engineering, Mechanics of Materials, Mechanical Engineering, Global and Planetary Change, and Analytical Chemistry.

The main topics of Snowdon's research encompass multiple aspects of drilling and well engineering, hydrocarbon exploration and reservoir analysis, reservoir engineering and simulation methods, hydraulic fracturing and reservoir analysis, atmospheric and environmental gas dynamics, petroleum processing and analysis, as well as radioactive element chemistry and processing.

Frequent publication venues for Snowdon include OPAL (Open@LaTrobe) at La Trobe University and Zenodo (CERN European Organization for Nuclear Research), each featuring seven of their works. Other notable venues include the journal Organic Geochemistry, with five publications, and Marine and Petroleum Geology, with one publication.

Snowdon's recent papers include:

  • Mechanistic insights into sulfur rich oil formation, relevant to geological carbon storage routes. A study using (+) APPI FTICR-MS analysis (2020, Organic Geochemistry)
  • Inter-maceral effects on hydrocarbon generation as determined using artificial mixtures of purified macerals (2020, Organic Geochemistry)
  • Characterization of crude oils derived from carbonate and siliciclastic source rocks using FTICR-MS (2021, Organic Geochemistry)
  • Impacts of natural irradiation on sedimentary organic matter-A review (2023, Organic Geochemistry)
  • The dating of petroleum fluid residence time in subsurface reservoirs. Part 2: Tracking effects of radiolysis on crude oil by comprehensive molecular analysis (2020, Organic Geochemistry)

Snowdon has collaborated frequently with several researchers, including Ulrich von Rad, Bilal U. Haq, Suzanne O'Connell, Alistair Bent, and Charles D. Blome.

Best Publications

  • Immature oil and condensate: modification of hydrocarbon generation model for terrestrial organic matter

    L. R. Snowdon;T. G. Powell

  • Guidelines for assessing the petroleum potential of coaly source rocks using Rock-Eval pyrolysis

    R Sykes;L.R Snowdon

  • Polycyclic Aromatic Hydrocarbon Composition and Potential Sources for Sediment Samples from the Beaufort and Barents Seas

    Mark B. Yunker;Lloyd R. Snowdon;Robie W. Macdonald;John N. Smith

  • Fluorescence micro-spectrometry of synthetic and natural hydrocarbon fluid inclusions: crude oil chemistry, density and application to petroleum migration

    L.D. Stasiuk;L.R. Snowdon

  • Vitamin D and seasonal fluctuations of gadolinium-enhancing magnetic resonance imaging lesions in multiple sclerosis.

    Ashton F. Embry;Lloyd R. Snowdon;Reinhold Vieth

  • Alkane and PAH biomarkers as tracers of terrigenous organic carbon in Arctic Ocean sediments

    Mark B. Yunker;Robie W. Macdonald;Lloyd R. Snowdon;Brian R. Fowler

  • A practical biodegradation scale for use in reservoir geochemical studies of biodegraded oils

    Steve Larter;Haiping Huang;Jennifer Adams;Barry Bennett

  • Oil families and their sources in Canadian Williston Basin, (southeastern Saskatchewan and southwestern Manitoba)

    Kirk G. Osadetz;Paul W. Brooks;Lloyd R. Snowdon

  • Hydrogen isotopic compositions of individual alkanes as a new approach to petroleum correlation: case studies from the Western Canada Sedimentary Basin

    Maowen Li;Yongsong Huang;Mark Obermajer;Chunqing Jiang

  • Rock-Eval Tmax Suppression: Documentation and Amelioration

    Lloyd R. Snowdon

  • The organic geochemistry of asphaltenes and occluded biomarkers

    Lloyd R. Snowdon;John K. Volkman;Zhirong Zhang;Guoliang Tao

  • Oil from Type III organic matter: resinite revisited☆

    Lloyd R. Snowdon

  • Geochemical characterization of selected Western Canada oils by C5–C8 Compound Specific Isotope Correlation (CSIC)

    Michael J. Whiticar;Lloyd R. Snowdon

  • Bakken/Madison petroleum systems in the Canadian Williston Basin. Part 2: molecular markers diagnostic of Bakken and Lodgepole source rocks

    Chunqing Jiang;Maowen Li;Kirk G Osadetz;Lloyd R Snowdon

  • Resinite — A Potential Petroleum Source in the Upper Cretaceous/Tertiary of the Beaufort-Mackenzie Basin

    L. R. Snowdon

  • Book reviewApplied Petroleum Geochemistry: Edited by M. L. Bordenave. Editions Technip, Paris. 524 pp. 785F, U.S.$162

    Lloyd R. Snowdon

  • TLC–FID (Iatroscan) analysis of heavy oil and tar sand samples

    Chunqing Jiang;Steve R. Larter;Kimberley J. Noke;Lloyd R. Snowdon

  • Geochemical characterisation of Middle Devonian oils in NW Alberta, Canada: possible source and maturity effect on pyrrolic nitrogen compounds

    Maowen Li;M.G. Fowler;M. Obermajer;L.D. Stasiuk

  • Depositional Environment and Oil Generation in Ordovician Source Rocks from Southwestern Ontario, Canada: Organic Geochemical and Petrological Approach

    M. Obermajer;M. G. Fowler;L. R. Snowdon

  • Limitations of Use of Organic Petrographic Techniques for Identification of Petroleum Source Rocks

    T. G. Powell;S. Creaney;L. R. Snowdon

  • Natural gas composition in a geological environment and the implications for the processes of generation and preservation

    Lloyd R. Snowdon

Frequent Co-Authors

Martin G. Fowler
Martin G. Fowler Applied Petroleum Technology (Norway)
Fariborz Goodarzi
Fariborz Goodarzi Geological Survey of Canada
Maowen Li
Maowen Li Geological Survey of Canada
Steve Larter
Steve Larter University of Calgary
Philip A. Meyers
Philip A. Meyers University of Michigan–Ann Arbor
Haiping Huang
Haiping Huang University of Calgary
Ian D. Gates
Ian D. Gates University of Calgary
Robie W. Macdonald
Robie W. Macdonald Fisheries and Oceans Canada
Thomas Gentzis
Thomas Gentzis Core Laboratories (United States)
Bernhard Mayer
Bernhard Mayer University of Calgary

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