World's Best Scientists 2026 revealed!

D-Index & Metrics

Earth Science

D-Index
37
Citations
5197
World Ranking
6860
National Ranking
2401

Paul C. Hackley 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 Paul C. Hackley sits on this spectrum.

38–42 publications: 1 scientists 43–47 publications: 0 scientists 48–52 publications: 3 scientists 53–57 publications: 8 scientists 58–62 publications: 11 scientists 63–67 publications: 16 scientists 68–72 publications: 24 scientists 73–77 publications: 31 scientists 78–82 publications: 49 scientists 83–87 publications: 77 scientists 88–92 publications: 86 scientists 93–97 publications: 88 scientists 98–102 publications: 92 scientists 103–107 publications: 84 scientists 108–112 publications: 102 scientists 113–117 publications: 108 scientists 118–122 publications: 117 scientists 123–127 publications: 126 scientists 128–132 publications: 146 scientists 133–137 publications: 114 scientists 138–142 publications: 102 scientists 143–147 publications: 127 scientists 148–152 publications: 102 scientists 153–157 publications: 112 scientists 158–162 publications: 102 scientists 163–167 publications: 127 scientists 168–172 publications: 121 scientists 173–177 publications: 112 scientists 178–182 publications: 109 scientists 183–187 publications: 98 scientists 188–192 publications: 92 scientists 193–197 publications: 105 scientists 198–202 publications: 77 scientists 203–207 publications: 80 scientists 208–212 publications: 89 scientists 213–217 publications: 70 scientists 218–222 publications: 74 scientists 223–227 publications: 74 scientists 228–232 publications: 70 scientists 233–237 publications: 67 scientists 238–242 publications: 59 scientists 243–247 publications: 67 scientists 248–252 publications: 51 scientists 253–257 publications: 46 scientists 258–262 publications: 41 scientists 263–267 publications: 39 scientists 268–272 publications: 34 scientists 273–277 publications: 39 scientists 278–282 publications: 35 scientists 283–287 publications: 36 scientists 288–292 publications: 35 scientists 293–297 publications: 29 scientists 298–302 publications: 23 scientists 303–307 publications: 39 scientists 308–312 publications: 34 scientists 313–317 publications: 23 scientists 318–322 publications: 18 scientists 323–327 publications: 18 scientists 328–332 publications: 21 scientists 333–337 publications: 20 scientists 338–342 publications: 15 scientists 343–347 publications: 13 scientists 348–352 publications: 24 scientists 353–357 publications: 25 scientists 358–362 publications: 10 scientists 363–367 publications: 20 scientists 368–372 publications: 17 scientists 373–377 publications: 18 scientists 378–382 publications: 15 scientists 383–387 publications: 7 scientists 388–392 publications: 22 scientists 393–397 publications: 9 scientists 398–402 publications: 11 scientists 403–407 publications: 16 scientists 408–412 publications: 4 scientists 413–417 publications: 5 scientists 418–422 publications: 14 scientists 423–427 publications: 8 scientists 428–432 publications: 7 scientists 433–437 publications: 7 scientists 438–442 publications: 10 scientists 443–447 publications: 10 scientists 448–452 publications: 3 scientists 453–457 publications: 9 scientists 458–462 publications: 11 scientists 463–467 publications: 4 scientists 468–472 publications: 6 scientists 473–477 publications: 11 scientists 478–482 publications: 8 scientists 483–487 publications: 2 scientists 488–492 publications: 3 scientists 493–497 publications: 4 scientists 498–502 publications: 4 scientists 503–507 publications: 4 scientists 508–509 publications: 4 scientists 510+ publications: 100 scientists
38 publications 510+

This scientist: 196 publications — 59th percentile

59% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 510 publications or more.

Paul C. Hackley 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 Paul C. Hackley sits on this spectrum.

30 D-Index: 15 scientists 31 D-Index: 42 scientists 32 D-Index: 60 scientists 33 D-Index: 90 scientists 34 D-Index: 103 scientists 35 D-Index: 108 scientists 36 D-Index: 142 scientists 37 D-Index: 147 scientists 38 D-Index: 147 scientists 39 D-Index: 152 scientists 40 D-Index: 143 scientists 41 D-Index: 157 scientists 42 D-Index: 141 scientists 43 D-Index: 151 scientists 44 D-Index: 140 scientists 45 D-Index: 135 scientists 46 D-Index: 121 scientists 47 D-Index: 108 scientists 48 D-Index: 128 scientists 49 D-Index: 111 scientists 50 D-Index: 106 scientists 51 D-Index: 112 scientists 52 D-Index: 102 scientists 53 D-Index: 103 scientists 54 D-Index: 94 scientists 55 D-Index: 61 scientists 56 D-Index: 101 scientists 57 D-Index: 71 scientists 58 D-Index: 65 scientists 59 D-Index: 78 scientists 60 D-Index: 93 scientists 61 D-Index: 56 scientists 62 D-Index: 58 scientists 63 D-Index: 52 scientists 64 D-Index: 63 scientists 65 D-Index: 49 scientists 66 D-Index: 53 scientists 67 D-Index: 57 scientists 68 D-Index: 50 scientists 69 D-Index: 44 scientists 70 D-Index: 44 scientists 71 D-Index: 31 scientists 72 D-Index: 33 scientists 73 D-Index: 33 scientists 74 D-Index: 23 scientists 75 D-Index: 32 scientists 76 D-Index: 24 scientists 77 D-Index: 17 scientists 78 D-Index: 19 scientists 79 D-Index: 9 scientists 80 D-Index: 21 scientists 81 D-Index: 20 scientists 82 D-Index: 17 scientists 83 D-Index: 19 scientists 84 D-Index: 19 scientists 85 D-Index: 14 scientists 86 D-Index: 6 scientists 87 D-Index: 14 scientists 88 D-Index: 17 scientists 89 D-Index: 10 scientists 90 D-Index: 8 scientists 91 D-Index: 8 scientists 92 D-Index: 9 scientists 93 D-Index: 6 scientists 94+ D-Index: 98 scientists
30 D-Index 94+

This scientist: 37 D-Index — 16th percentile

16% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 94 D-Index or more.

Overview

Paul C. Hackley is affiliated with the United States Geological Survey in the United States. Their research primarily focuses on engineering, with significant contributions in various subfields such as mechanics of materials, analytical chemistry, global and planetary change, ocean engineering, and mechanical engineering.

Their work extensively addresses topics including hydrocarbon exploration and reservoir analysis, petroleum processing and analysis, atmospheric and environmental gas dynamics, enhanced oil recovery techniques, geochemistry and geologic mapping, coal properties and utilization, and hydraulic fracturing and reservoir analysis.

Frequent coauthors collaborating with Paul C. Hackley include Aaron M. Jubb, Brett J. Valentine, Javin J. Hatcherian, Justin E. Birdwell, and Ryan J. McAleer.

Publications by Paul C. Hackley appear predominantly in venues such as the International Journal of Coal Geology, Abstracts with programs - Geological Society of America, AAPG Bulletin, SSRN Electronic Journal, and Organic Geochemistry.

Recent papers authored or coauthored by the scientist include:

  • "A review of spatially resolved techniques and applications of organic petrography in shale petroleum systems", 2021, International Journal of Coal Geology
  • "Evidence of Cosmic Impact at Abu Hureyra, Syria at the Younger Dryas Onset (~12.8 ka): High-temperature melting at >2200 °C", 2020, Scientific Reports
  • "Relating Tmax and hydrogen index to vitrinite and solid bitumen reflectance in hydrous pyrolysis residues: Comparisons to natural thermal indices", 2021, International Journal of Coal Geology
  • "Evidence of wildfires and elevated atmospheric oxygen at the Frasnian-Famennian boundary in New York (USA): Implications for the Late Devonian mass extinction", 2020, Geological Society of America Bulletin
  • "Nanoscale Molecular Composition of Solid Bitumen from the Eagle Ford Group across a Natural Thermal Maturity Gradient", 2020, Energy & Fuels

Best Publications

  • Application of organic petrography in North American shale petroleum systems: A review

    Paul C. Hackley;Brian J. Cardott

  • The nature of porosity in organic-rich mudstones of the Upper Jurassic Kimmeridge Clay Formation, North Sea, offshore United Kingdom

    Neil S. Fishman;Paul C. Hackley;Heather A. Lowers;Ronald J. Hill

  • Review and update of the applications of organic petrology: Part 1, geological applications

    Isabel Suárez-Ruiz;Deolinda Flores;João Graciano Mendonça Filho;Paul C. Hackley

  • Pore-types and pore-network evolution in Upper Devonian-Lower Mississippian Woodford and Mississippian Barnett mudstones: Insights from laboratory thermal maturation and organic petrology

    Lucy T. Ko;Stephen C. Ruppel;Robert G. Loucks;Paul C. Hackley

  • Nanoscale geochemical and geomechanical characterization of organic matter in shale.

    Jing Yang;Javin Hatcherian;Paul C. Hackley;Andrew E. Pomerantz

  • Standardization of reflectance measurements in dispersed organic matter: Results of an exercise to improve interlaboratory agreement

    Paul C. Hackley;Carla Viviane Araujo;Angeles G. Borrego;Antonis Bouzinos

  • Understanding and distinguishing reflectance measurements of solid bitumen and vitrinite using hydrous pyrolysis: Implications to petroleum assessment

    Paul C. Hackley;Michael Lewan

  • Organic petrology and geochemistry of mudrocks from the lacustrine Lucaogou Formation, Santanghu Basin, northwest China: Application to lake basin evolution

    Paul C. Hackley;Neil Fishman;Tao Wu;Gregory Baugher

  • Biogenic origin of coalbed gas in the northern Gulf of Mexico Coastal Plain, U.S.A

    Peter D. Warwick;F. Clayton Breland;Paul C. Hackley

  • On the petrographic distinction of bituminite from solid bitumen in immature to early mature source rocks

    Paul C. Hackley;Brett J. Valentine;Javin J. Hatcherian

  • Organic petrology and micro-spectroscopy of Tasmanites microfossils: Applications to kerogen transformations in the early oil window

    Paul C. Hackley;Paul C. Hackley;Clifford C. Walters;Simon R. Kelemen;Maria Mastalerz

  • Geological and geochemical characterization of the Lower Cretaceous Pearsall Formation, Maverick Basin, south Texas: A future shale gas resource?

    Paul C. Hackley

  • Thermal maturity of northern Appalachian Basin Devonian shales: Insights from sterane and terpane biomarkers

    Paul C. Hackley;Robert T. Ryder;Michael H. Trippi;Hossein Alimi

  • Geologic shaded relief map of Venezuela

    Paul C. Hackley;Franco Urbani;Alex W. Karlsen;Christopher P. Garrity

  • Suppression of vitrinite reflectance by bitumen generated from liptinite during hydrous pyrolysis of artificial source rock

    Kenneth E. Peters;Paul C. Hackley;J. J. Thomas;A. E. Pomerantz

  • Application of Raman Spectroscopy as Thermal Maturity Probe in Shale Petroleum Systems: Insights from Natural and Artificial Maturation Series

    Paul C. Hackley;N. Keno Lünsdorf

  • High microscale variability in Raman thermal maturity estimates from shale organic matter

    Aaron M. Jubb;Palma J. Botterell;Justin E. Birdwell;Robert C. Burruss

  • Organic petrography of Leonardian (Wolfcamp A) mudrocks and carbonates, Midland Basin, Texas: The fate of oil-prone sedimentary organic matter in the oil window

    Paul C. Hackley;Tongwei Zhang;Aaron M. Jubb;Brett J. Valentine

  • A review of spatially resolved techniques and applications of organic petrography in shale petroleum systems

    Paul C. Hackley;Aaron M. Jubb;Ryan J. McAleer;Brett J. Valentine

  • Identification of alginite and bituminite in rocks other than coal. 2006, 2009, and 2011 round robin exercises of the ICCP Identification of Dispersed Organic Matter Working Group

    J. Kus;C.V. Araujo;A.G. Borrego;D. Flores

  • Assessment of Thermal Maturity Trends in Devonian–Mississippian Source Rocks Using Raman Spectroscopy: Limitations of Peak-Fitting Method

    Jason S. Lupoi;Luke P. Fritz;Thomas M. Parris;Paul C. Hackley

  • Vitrinite reflectance versus pyrolysis Tmax data: Assessing thermal maturity in shale plays with special reference to the Duvernay shale play of the Western Canadian Sedimentary Basin, Alberta, Canada

    Raphael A.J. Wust;Brent R. Nassichuk;Ron Brezovski;Paul C Hackley

Frequent Co-Authors

Maria Mastalerz
Maria Mastalerz Indiana University
Isabel Suárez-Ruiz
Isabel Suárez-Ruiz Spanish National Research Council
Deolinda Flores
Deolinda Flores University of Porto
Tongwei Zhang
Tongwei Zhang The University of Texas at Austin
Cortland F. Eble
Cortland F. Eble University of Kentucky
Mehdi Ostadhassan
Mehdi Ostadhassan Kiel University
James C. Hower
James C. Hower University of Kentucky
Thomas Gentzis
Thomas Gentzis Core Laboratories (United States)
Gunther Kletetschka
Gunther Kletetschka Charles University
James C. Weaver
James C. Weaver Cornell University

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