World's Best Scientists 2026 revealed!
Award Badge
Earth Science
South Africa
2025

D-Index & Metrics

Discipline name D-Index World Ranking National Ranking Publications Citations
Earth Science 57 2313 8 182 9704

Lewis D. Ashwal publications per year

The chart shows the history of publications by Lewis D. Ashwal between 1977 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Lewis D. Ashwal published across 49 years, from 1977 to 2025, averaging 3.9 papers a year. Output peaked at 11 publications in 2015. 5 of the 189 publications appeared in the last two years.

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

189 publications in total across all disciplines

View publications per year as a table
Lewis D. Ashwal: publications per year, 1977 to 2025
Year Publications
1977 1
1978 0
1979 1
1980 1
1981 1
1982 6
1983 6
1984 2
1985 5
1986 4
1987 3
1988 5
1989 4
1990 0
1991 0
1992 5
1993 6
1994 4
1995 2
1996 0
1997 2
1998 3
1999 10
2000 1
2001 8
2002 3
2003 7
2004 5
2005 4
2006 6
2007 4
2008 2
2009 7
2010 6
2011 4
2012 5
2013 4
2014 9
2015 11
2016 4
2017 8
2018 2
2019 3
2020 1
2021 7
2022 1
2023 1
2024 4
2025 1
Total 189
Download as CSV

Lewis D. Ashwal 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 Lewis D. Ashwal 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, 178–187 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: 182 publications — 55th percentile

55% 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
178–187 414 182
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

Lewis D. Ashwal 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 Lewis D. Ashwal 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, 57 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: 57 D-Index — 76th percentile

76% 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
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 57
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

Research.com Recognitions

  • 2025 - Research.com Earth Science in South Africa Leader Award
  • 2022 - Research.com Earth Science in South Africa Leader Award

Overview

Lewis D. Ashwal is affiliated with the University of the Witwatersrand in South Africa. Their primary field of study is Earth and Planetary Sciences, with particular emphasis on geophysics, artificial intelligence, astronomy and astrophysics, mechanics of materials, and geochemistry and petrology. The research topics covered in their work include geological and geochemical analysis, geochemistry and geologic mapping, earthquake and tectonic studies, planetary science and exploration, hydrocarbon exploration and reservoir analysis, high-pressure geophysics and materials, and geology and paleoclimatology research.

Ashwal's research output includes several recent publications across a range of scientific journals. Notable papers are:

  • "Machine learning-based prediction of trace element concentrations using data from the Karoo large igneous province and its application in prospectivity mapping," 2021, published in Artificial Intelligence in Geosciences
  • "Sub-lithospheric mantle sources for overlapping southern African Large Igneous Provinces," 2021, published in South African Journal of Geology
  • "Sr-Enriched Glassy Picrites From the Karoo Large Igneous Province are Evolved, not Primitive Magmatic Rocks," 2021, published in Geochemistry Geophysics Geosystems
  • "Melt infiltration in a crystal mush and pegmatoid formation in the platiniferous Merensky Reef, Bushveld Complex, South Africa," 2024, published in Mineralium Deposita
  • "Subsurface Microbial Colonization at Mineral-Filled Veins in 2-Billion-Year-Old Mafic Rock from the Bushveld Igneous Complex, South Africa," 2024, published in Microbial Ecology

The venues where Ashwal has frequently published include Artificial Intelligence in Geosciences, South African Journal of Geology, Mineralium Deposita, Microbial Ecology, and Geochemistry Geophysics Geosystems.

Collaboration is a recurring feature of Ashwal's research. Frequent co-authors include Ben Hayes, S. J. Webb, Yohey Suzuki, Mariko Kouduka, and Hanae Kobayashi, with multiple joint publications. These collaborations span geosciences and related fields, reflecting interdisciplinary research approaches.

Best Publications

  • Diamonds sampled by plumes from the core–mantle boundary

    Trond H. Torsvik;Trond H. Torsvik;Kevin Burke;Kevin Burke;Bernhard Steinberger;Bernhard Steinberger;Susan J. Webb

  • Deep mantle structure as a reference frame for movements in and on the Earth

    Trond H. Torsvik;Rob van der Voo;Pavel V. Doubrovine;Kevin Burke;Kevin Burke

  • Age and tectonic evolution of Neoproterozoic ductile shear zones in southwestern Madagascar, with implications for Gondwana studies

    Maarten J. de Wit;Sam A. Bowring;Lew D. Ashwal;Leon G. Randrianasolo

  • Petrogenesis of Neoproterozoic Granitoids and Related Rocks from the Seychelles: the Case for an Andean-type Arc Origin

    L.D. Ashwal;Daniel Demaiffe;Trond Torsvik

  • U-Pb Geochronology and Isotope Geochemistry of the Archean and Proterozoic Rocks of North-Central Madagascar

    R. D. Tucker;L. D. Ashwal;M. J. Handke;M. A. Hamilton

  • Slow cooling of deep crustal granulites and Pb-loss in zircon

    Lewis D. Ashwal;Robert D. Tucker;Ernst K. Zinner;Ernst K. Zinner

  • Neoproterozoic continental arc magmatism in west-central Madagascar

    Michael J. Handke;Robert D. Tucker;Lewis D. Ashwal

  • A Precambrian microcontinent in the Indian Ocean

    Trond H. Torsvik;Hans Amundsen;Ebbe H. Hartz;Fernando Corfu

  • New way to map old sutures using deformed alkaline rocks and carbonatites

    Kevin Burke;Lewis D. Ashwal;Susan J. Webb

  • SNC meteorites: Igneous rocks from Mars?

    C. A. Wood;L. D. Ashwal

  • Late Cretaceous India–Madagascar fit and timing of break‐up related magmatism

    T.H. Torsvik;R.D. Tucker;L.D. Ashwal;L.M. Carter

  • U–Pb geochronology of Seychelles granitoids: a Neoproterozoic continental arc fragment

    R.D. Tucker;L.D. Ashwal;T.H. Torsvik

  • Late Cretaceous magmatism in Madagascar: palaeomagnetic evidence for a stationary Marion hotspot

    T.H Torsvik;R.D Tucker;L.D Ashwal;E.A Eide

  • Magmatic stratigraphy in the Bushveld Northern Lobe: continuous geophysical and mineralogical data from the 2950 m Bellevue drillcore

    Lewis D. Ashwal;Susan J. Webb;Michael W. Knoper

  • Two-stage models for lunar and terrestrial anorthosites Petrogenesis without a magma ocean

    John Longhi;Lewis D. Ashwal

  • Heat production in an Archean crustal profile and implications for heat flow and mobilization of heat-producing elements

    L.D. Ashwal;P. Morgan;S.A. Kelley;J.A. Percival

  • Proterozoic mountain building in Peninsular India: an analysis based primarily on alkaline rock distribution

    C. Leelanandam;K. Burke;K. Burke;K. Burke;L. D. Ashwal;S. J. Webb

  • THE TEMPORALITY OF ANORTHOSITES

    Lewis D. Ashwal

  • Age, petrogenesis and significance of 1 Ga granitoids and related rocks from the Sendra area, Aravalli Craton, NW India

    M.K. Pandit;L.M. Carter;L.D. Ashwal;R.D. Tucker

  • Continental crust beneath southeast Iceland.

    Trond H. Torsvik;Trond H. Torsvik;Hans E. F. Amundsen;Reidar G. Trønnes;Pavel V. Doubrovine

  • Geology of Rajasthan (Northwest India) Precambrian to Recent. A.B. Roy, S.R. Jakhar (Eds.); Scientific Publishers (India), Jodhpur, 421 pages, Hardbound

    Lewis D Ashwal

Frequent Co-Authors

Trond H. Torsvik
Trond H. Torsvik University of Oslo
Fernando Corfu
Fernando Corfu University of Oslo
Kevin Burke
Kevin Burke University of Houston
Bernhard Steinberger
Bernhard Steinberger Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
Torgeir B. Andersen
Torgeir B. Andersen University of Oslo
Robert D. Tucker
Robert D. Tucker Washington University in St. Louis
Carmen Gaina
Carmen Gaina University of Oslo
Stephanie C. Werner
Stephanie C. Werner University of Oslo
Bjørn Jamtveit
Bjørn Jamtveit University of Oslo
Manoj K. Pandit
Manoj K. Pandit University of Rajasthan

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Pursuing a degree related to Earth Science can open doors to various interdisciplinary careers. Many students explore online programs that complement their scientific knowledge, such as environmental management or human resources in scientific organizations. For those interested in advancing their career with flexible learning options, the best online masters degree in human resource management programs offer valuable skills in managing workforce dynamics within environmental firms.

Online education also makes it accessible for non-traditional students. Programs designed for different age groups, including online degree programs for seniors, ensure lifelong learning opportunities remain available to all, promoting continued professional and personal development.

Additionally, interdisciplinary fields such as library science intersect with Earth Science data management and research. Those interested can explore ALA-accredited schools to find reputable programs that build expertise in organizing scientific information. Understanding what is library science highlights its importance in maintaining accessible and accurate scientific records, crucial for environmental research.

Overall, combining Earth Science with complementary online degrees broadens career prospects and supports evolving industry needs in research, management, and education.

Best Scientists Citing Lewis D. Ashwal

Trending Scientists

Recently Published Articles