World's Best Scientists 2026 revealed!

D-Index & Metrics

Earth Science

D-Index
58
Citations
11692
World Ranking
2163
National Ranking
223

Clark R.L. Friend 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 Clark R.L. Friend sits on this spectrum.

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 publications 603+

This scientist: 148 publications — 38th percentile

38% of scientists in this discipline score the same or lower.

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

Clark R.L. Friend 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 Clark R.L. Friend sits on this spectrum.

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: 58 D-Index — 77th percentile

77% of scientists in this discipline score the same or lower.

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

Overview

Clark R.L. Friend is affiliated with Oxford Brookes University in the United Kingdom. Their research primarily lies within Earth and Planetary Sciences, with a strong focus on geophysics and geology. The scientist has contributed extensively to studies involving geological and geochemical analysis as well as high-pressure geophysics and materials.

Their main fields of study include:

  • Earth and Planetary Sciences

Subfields of study involve:

  • Geophysics
  • Geology
  • Artificial Intelligence
  • Paleontology
  • Environmental Chemistry

Clark R.L. Friend's major research topics encompass:

  • Geological and Geochemical Analysis
  • High-pressure geophysics and materials
  • Earthquake and tectonic studies
  • Geological Studies and Exploration
  • Geochemistry and Geologic Mapping
  • Paleontology and Stratigraphy of Fossils
  • Methane Hydrates and Related Phenomena

The scientist has published several recent papers, prominently in the journal Precambrian Research and Earth and Planetary Science Letters. Notable works include:

  • "Eoarchean contrasting ultra-high-pressure to low-pressure metamorphisms (<250 to >1000 °C/GPa) explained by tectonic plate convergence in deep time" (2020), Precambrian Research
  • "Fifty years of the Eoarchean and the case for evolving uniformitarianism" (2021), Precambrian Research
  • "Isua (Greenland) ~3700 Ma meta-serpentinite olivine Mg# and δ18O signatures show connection between the early mantle and hydrosphere: Geodynamic implications" (2021), Precambrian Research
  • "Review of the Isua supracrustal belt area (Greenland) Eoarchean geology from integrated 1:20,000 scale maps, field observations and laboratory data: Constraints on early geodynamics" (2022), Precambrian Research
  • "In support of rare relict ∼3700 Ma stromatolites from Isua (Greenland)" (2021), Earth and Planetary Science Letters

Clark R.L. Friend frequently collaborates with a group of researchers, including Allen P. Nutman, Vickie C. Bennett, Martin J. Van Kranendonk, Keewook Yi, and Allan R. Chivas. Their work shows recurring partnerships with Allen P. Nutman and Vickie C. Bennett, who both have contributed to multiple publications together.

The scientist's frequent publication venues comprise:

  • Precambrian Research
  • Earth and Planetary Science Letters
  • Lithos
  • Earth-Science Reviews
  • Geoscience Frontiers

Best Publications

  • Evidence for life on Earth before 3,800 million years ago.

    S. J. Mojzsis;G. Arrhenius;K. D. McKeegan;T. M. Harrison

  • Rapid emergence of life shown by discovery of 3,700-million-year-old microbial structures

    Allen Phillip Nutman;Allen Phillip Nutman;Vickie C. Bennett;Clark R. L. Friend;Martin J. Van Kranendonk

  • The Itsaq Gneiss Complex of southern West Greenland; the world's most extensive record of early crustal evolution (3900-3600 Ma)

    Allen P. Nutman;Victor R. McGregor;Clark R.L. Friend;Victoria C. Bennett

  • Multistage late Neoarchaean crustal evolution of the North China Craton, eastern Hebei

    Allen P. Nutman;Yusheng Wan;Lilin Du;Clark R.L. Friend

  • Crustal Evolution of Singhbhum North Orissa Eastern India

    Unknown

  • Recognition of ≥3850 Ma water-lain sediments in West Greenland and their significance for the early Archaean Earth

    Allen P. Nutman;Stephen J. Mojzsis;Clark R.L. Friend

  • SHRIMP U-Pb Geochronology of the Closepet Granite and Peninsular Gneiss, Karnataka, South India

    C. R. L. Friend;A. P. Nutman

  • Meta-igneous (non-gneissic) tonalites and quartz-diorites from an extensive ca. 3800 Ma terrain south of the Isua supracrustal belt, southern West Greenland: constraints on early crust formation

    Allen P. Nutman;Vickie C. Bennett;Clark R. L. Friend;Marc D. Norman

  • New pieces to the Archaean terrane jigsaw puzzle in the Nuuk region, southern West Greenland: steps in transforming a simple insight into a complex regional tectonothermal model

    Clark R L Friend;Allen Phillip Nutman

  • ̃ 3710 and ⪖ 3790 Ma volcanic sequences in the Isua (Greenland) supracrustal belt; structural and Nd isotope implications

    Allen P. Nutman;Vickie C. Bennett;Clark R.L. Friend;Minik T. Rosing

  • Late Archaean terrane accretion in the Godthåb region, southern West Greenland

    C. R. L. Friend;A. P. Nutman;V. R. McGregor

  • New 1:20,000 scale geological maps, synthesis and history of investigation of the Isua supracrustal belt and adjacent orthogneisses, southern West Greenland: a glimpse of Eoarchaean crust formation and orogeny

    Allen P. Nutman;Clark R.L. Friend

  • TIMING OF LATE ARCHAEAN TERRANE ASSEMBLY, CRUSTAL THICKENING AND GRANITE EMPLACEMENT IN THE NUUK REGION, SOUTHERN WEST GREENLAND

    C.R.L. Friend;A.P. Nutman;H. Baadsgaard;P.D. Kinny

  • Evolution and assembly of Archean Gneiss Terranes in the Godthåbsfjord Region, southern west Greenland: Structural, metamorphic, and isotopic evidence

    Allen P. Nutman;Clark R. L. Friend;Halfdan Baadsgaard;Victor R. McGregor

  • Evidence for 3650–3600 Ma assembly of the northern end of the Itsaq Gneiss Complex, Greenland: Implication for early Archaean tectonics

    Allen P. Nutman;Clark R. L. Friend;Vickie C. Bennett

  • A reappraisal of the Lewisian Gneiss Complex: geochronological evidence for its tectonic assembly from disparate terranes in the Proterozoic

    C. R. L. Friend;P. D. Kinny

  • The early archaean Itsaq gneiss complex of Southern West Greenland: The importance of field observations in interpreting age and isotopic constraints for early terrestrial evolution

    Allen P Nutman;Allen P Nutman;Vickie C Bennett;Clark R.L Friend;Victor R Mcgregor

  • Provenance of the Moine Supergroup of NW Scotland: evidence from geochronology of detrital and inherited zircons from (meta)sedimentary rocks, granites and migmatites

    C.R.L. Friend;R.A. Strachan;P.D. Kinny;G.R. Watt

  • Adjacent terranes with ca. 2715 and 2650 Ma high-pressure metamorphic assemblages in the Nuuk region of the North Atlantic Craton, southern West Greenland: Complexities of Neoarchaean collisional orogeny

    Allen Phillip Nutman;Clark Friend

  • U-Pb isotopic evidence for the accretion of different crustal blocks to form the Lewisian Complex of northwest Scotland

    P. D. Kinny;C. R. L. Friend

  • New evidence for protolith ages of Lewisian granulites, northwest Scotland

    C. R. L. Friend;P. D. Kinny

Frequent Co-Authors

Allen P. Nutman
Allen P. Nutman University of Wollongong
Vickie C. Bennett
Vickie C. Bennett Australian National University
Peter D. Kinny
Peter D. Kinny Curtin University
Allan R. Chivas
Allan R. Chivas University of Wollongong
Martin J. Van Kranendonk
Martin J. Van Kranendonk Curtin University
Marc D. Norman
Marc D. Norman Australian National University
Dunyi Liu
Dunyi Liu Chinese Academy of Geological Sciences
Rob Strachan
Rob Strachan University of Portsmouth
Hiroshi Hidaka
Hiroshi Hidaka Nagoya University
Stephen J. Mojzsis
Stephen J. Mojzsis University of Bayreuth

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