World's Best Scientists 2026 revealed!
Jahandar Ramezani

Jahandar Ramezani

D-Index & Metrics

Earth Science

D-Index
49
Citations
9964
World Ranking
3564
National Ranking
1410

Jahandar Ramezani 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 Jahandar Ramezani 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: 167 publications — 45th percentile

45% of scientists in this discipline score the same or lower.

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

Jahandar Ramezani 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 Jahandar Ramezani 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: 49 D-Index — 54th percentile

54% of scientists in this discipline score the same or lower.

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

Overview

Jahandar Ramezani is affiliated with MIT in the United States and specializes in Earth and Planetary Sciences. Their research spans 136 publications primarily focused on paleontology, geophysics, atmospheric science, geology, and artificial intelligence within the broader Earth sciences domain.

The scientist's work concentrates on several main topics including geological and geochemical analysis, paleontology and stratigraphy of fossils, geology and paleoclimatology research, paleontology and evolutionary biology, evolution and paleontology studies, geochemistry and geologic mapping, as well as earthquake and tectonic studies.

Jahandar Ramezani has contributed to numerous scientific papers, some of the notable publications include:

  • High-precision U-Pb age constraints on the Permian floral turnovers, paleoclimate change, and tectonics of the North China block (2021), published in Geology
  • The Late Triassic Ischigualasto Formation at Cerro Las Lajas (La Rioja, Argentina): fossil tetrapods, high-resolution chronostratigraphy, and faunal correlations (2020), published in Scientific Reports
  • Progress, problems and prospects: An overview of the Guadalupian Series of South China and North America (2020), published in Earth-Science Reviews
  • Calibrating the zenith of dinosaur diversity in the Campanian of the Western Interior Basin by CA-ID-TIMS U-Pb geochronology (2022), published in Scientific Reports
  • Sustained and intensified lacustrine methane cycling during Early Permian climate warming (2022), published in Nature Communications

Frequent co-authors in their research include Shu-zhong Shen, Qiong Wu, Yichun Zhang, Zhang-shuai Hou, and Douglas H. Erwin. These collaborations highlight interdisciplinary approaches across various subfields linked to paleontology and Earth sciences.

Jahandar Ramezani's publications often appear in venues such as Abstracts with Programs - Geological Society of America, Geological Society of America Bulletin, Earth and Planetary Science Letters, Palaeogeography Palaeoclimatology Palaeoecology, and Scientific Reports. These journals reflect the scientist's engagement with both geological and paleontological research communities.

Best Publications

  • Calibrating the End-Permian Mass Extinction

    Shu-zhong Shen;James L. Crowley;James L. Crowley;Yue Wang;Samuel A. Bowring

  • The Saghand Region, Central Iran: U-Pb geochronology, petrogenesis and implications for Gondwana Tectonics

    Jahandar Ramezani;Robert D. Tucker

  • Extinction of Cloudina and Namacalathus at the Precambrian-Cambrian boundary in Oman

    Joachim E. Amthor;John P. Grotzinger;Stefan Schröder;Samuel A. Bowring

  • Geochronologic constraints on the chronostratigraphic framework of the Neoproterozoic Huqf Supergroup, Sultanate of Oman

    Samuel A Bowring;John P Grotzinger;Daniel J Condon;Jahandar Ramezani

  • Dodging snowballs: Geochronology of the Gaskiers glaciation and the first appearance of the Ediacaran biota

    Judy P. Pu;Judy P. Pu;Samuel A. Bowring;Jahandar Ramezani;Paul Myrow

  • Geochronological constraints on terminal Neoproterozoic events and the rise of Metazoan

    S. Bowring;P. Myrow;E. Landing;J. Ramezani

  • Timing of recovery from the end-Permian extinction: Geochronologic and biostratigraphic constraints from south China

    Daniel J. Lehrmann;Jahandar Ramezani;Samuel A. Bowring;Mark W. Martin

  • High-precision U-Pb zircon geochronology of the Late Triassic Chinle Formation, Petrified Forest National Park (Arizona, USA): Temporal constraints on the early evolution of dinosaurs

    Jahandar Ramezani;Gregory Dean Hoke;David E. Fastovsky;Samuel A. Bowring

  • Coeval Large-Scale Magmatism in the Kalahari and Laurentian Cratons During Rodinia Assembly

    Richard E. Hanson;James L. Crowley;Samuel A. Bowring;Jahandar Ramezani

  • High-precision temporal calibration of Late Permian vertebrate biostratigraphy: U-Pb zircon constraints from the Karoo Supergroup, South Africa

    Bruce S. Rubidge;Douglas H. Erwin;Douglas H. Erwin;Jahandar Ramezani;Samuel A. Bowring

  • U-Pb age constraints on dinosaur rise from south Brazil

    Max C. Langer;Jahandar Ramezani;Átila A.S. Da Rosa

  • Geology and thermochronology of Tertiary Cordilleran-style metamorphic core complexes in the Saghand region of central Iran

    Charles Verdel;Brian P. Wernicke;Jahandar Ramezani;Jamshid Hassanzadeh

  • A sudden end-Permian mass extinction in South China

    Shu-zhong (沈树忠) Shen;Shu-zhong (沈树忠) Shen;Jahandar Ramezani;Jun Chen;Chang-Qun (曹长群) Cao

  • A new giant titanosaur sheds light on body mass evolution among sauropod dinosaurs

    José Luis Carballido;Diego Pol;Alejandro Otero;Ignacio Alejandro Cerda

  • When and how did the terrestrial mid-Permian mass extinction occur? Evidence from the tetrapod record of the Karoo Basin, South Africa.

    Michael O. Day;Jahandar Ramezani;Samuel A. Bowring;Peter M. Sadler

  • High-precision U–Pb geochronology and a new chronostratigraphy for the Cañadón Asfalto Basin, Chubut, central Patagonia: Implications for terrestrial faunal and floral evolution in Jurassic

    Rubén Cúneo;Jahandar Ramezani;Roberto Scasso;Roberto Scasso;Diego Pol

  • Geomorphic evidence for post-10 Ma uplift of the western flank of the central Andes 18°30′ - 22°S

    Gregory D. Hoke;Gregory D. Hoke;Bryan L. Isacks;Teresa E. Jordan;Nicolás Blanco

  • Paleoproterozoic intraplate magmatism and basin development on the Kaapvaal Craton: Age, paleomagnetism and geochemistry of ~1.93 to ~1.87 Ga post-Waterberg dolerites

    R.E. Hanson;W.A. Gose;J.L. Crowley;J. Ramezani

  • An integrated biostratigraphy (conodonts and foraminifers) and chronostratigraphy (paleomagnetic reversals, magnetic susceptibility, elemental chemistry, carbon isotopes and geochronology) for the Permian–Upper Triassic strata of Guandao section, Nanpanjiang Basin, south China

    Daniel J. Lehrmann;Leanne M. Stepchinski;Demir Altiner;Michael J. Orchard

  • Constraints on early Cambrian carbon cycling from the duration of the Nemakit-Daldynian–Tommotian boundary δ13C shift, Morocco

    Adam C. Maloof;Jahandar Ramezani;Samuel A. Bowring;David A. Fike

  • U-Pb geochronology of mid-Paleozoic plutonism in western New Zealand: Implications for S-type granite generation and growth of the east Gondwana margin

    A.J. Tulloch;J. Ramezani;D.L. Kimbrough;K. Faure

  • Cretaceous felsic volcanism in New Zealand and Lord Howe Rise (Zealandia) as a precursor to final Gondwana break-up

    A. J. Tulloch;J. Ramezani;N. Mortimer;J. Mortensen

Frequent Co-Authors

Nicholas L. Swanson-Hysell
Nicholas L. Swanson-Hysell University of Minnesota
Douglas H. Erwin
Douglas H. Erwin National Museum of Natural History
James L. Crowley
James L. Crowley Boise State University
Shu-zhong Shen
Shu-zhong Shen Chinese Academy of Sciences
William C. Clyde
William C. Clyde University of New Hampshire
Kirk R. Johnson
Kirk R. Johnson National Museum of Natural History
Adam C. Maloof
Adam C. Maloof Princeton University
Max C. Langer
Max C. Langer Universidade de São Paulo

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Related Online Degrees & Career Pathways

For those interested in expanding their knowledge beyond Earth Science, there are numerous related online degree options that cater to diverse interests and career goals. Seniors looking to re-engage with academics will find valuable information exploring college degrees for seniors, which highlights flexible programs designed to fit mature learners’ lifestyles.

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Building on that, a library degree offers a strong foundation for managing digital and physical collections, combining technology with traditional educational skills. This can be a solid complement to Earth Science if you are interested in data curation and scientific information dissemination.

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