World's Best Scientists 2026 revealed!
Howard A. Armstrong

Howard A. Armstrong

D-Index & Metrics

Earth Science

D-Index
31
Citations
2889
World Ranking
9021
National Ranking
897

Howard A. Armstrong 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 Howard A. Armstrong 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: 81 publications — 4th percentile

4% of scientists in this discipline score the same or lower.

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

Howard A. Armstrong 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 Howard A. Armstrong 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: 31 D-Index — 4th percentile

4% of scientists in this discipline score the same or lower.

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

Overview

Howard A. Armstrong is affiliated with Durham University in the United Kingdom. Their academic profile indicates a focus on research and scholarship connected to this institution.

There are no recorded publications, co-authors, specific research topics, or fields of study available in the current data to provide further details on their scientific contributions.

Additional information such as recent papers, frequent co-authors, publication venues, and book publications is not present in the provided data and therefore is not included in this profile.

There is no record of any awards or honors received by Howard A. Armstrong in the current dataset.

The absence of data on main fields of study, subfields, or main topics of work means no detailed description of their research areas can be offered at this time.

This profile reflects only the verified and available data as of the latest update without extrapolation beyond the given information.

Best Publications

  • Arabia–Eurasia collision and the forcing of mid-Cenozoic global cooling

    Mark B. Allen;Howard A. Armstrong

  • Presence of the earliest vertebrate hard tissue in conodonts

    IJ Sansom;MP Smith;HA Armstrong;MM Smith

  • Polar front shift and atmospheric CO2 during the glacial maximum of the Early Paleozoic Icehouse

    Thijs R. A. Vandenbroucke;Howard A. Armstrong;Mark Williams;Florentin Paris;Florentin Paris

  • Origin, sequence stratigraphy and depositional environment of an upper Ordovician (Hirnantian) deglacial black shale, Jordan

    Howard A. Armstrong;Brian R. Turner;Issa M. Makhlouf;Graham P. Weedon

  • Conodonts from the Upper Ordovician – Lower Silurian carbonate platform of North Greenland

    H.A Armstrong

  • Black shale deposition in an Upper Ordovician-Silurian permanently stratified, peri-glacial basin, southern Jordan

    Howard A. Armstrong;Geoffrey D. Abbott;Brian R. Turner;Issa M. Makhlouf

  • Epipelagic chitinozoan biotopes map a steep latitudinal temperature gradient for earliest Late Ordovician seas: Implications for a cooling Late Ordovician climate

    Thijs R.A. Vandenbroucke;Thijs R.A. Vandenbroucke;Thijs R.A. Vandenbroucke;Howard A. Armstrong;Mark Williams;Florentin Paris

  • Climatic controls on late Pleistocene alluvial fans, Cyprus

    J.V. Waters;S.J. Jones;H.A. Armstrong

  • Glaciation and deglaciation of the Libyan Desert: The Late Ordovician record

    D.P. Le Heron;H.A. Armstrong;C. Wilson;J.P. Howard

  • Rare earth element geochemistry of upper Ordovician cherts from the Southern Uplands of Scotland

    A. W. Owen;H. A. Armstrong;J. D. Floyd

  • Thermal effects on rare earth element and strontium isotope chemistry in single conodont elements.

    H.A Armstrong;D.G Pearson;M Griselin

  • Deep-sea sediments record the geophysiology of the late Ordovician glaciation

    Howard A. Armstrong;Angela L. Coe

  • Late Ordovician (Ashgillian) glacial deposits in southern Jordan

    Brian R. Turner;Issa M. Makhlouf;Howard A. Armstrong

  • Ground-truthing Late Ordovician climate models using the paleobiogeography of graptolites

    Thijs R. A. Vandenbroucke;Thijs R. A. Vandenbroucke;Howard A. Armstrong;Mark Williams;Mark Williams;Jan A. Zalasiewicz

  • Evolution of the Northern Belt, Southern Uplands: implications for the Southern Uplands controversy

    H. A. Armstrong;A. W. Owen;C. T. Scrutton;E. N. K. Clarkson

  • Response of the Inter-tropical Convergence Zone to Southern Hemisphere cooling during Upper Ordovician glaciation

    Howard A. Armstrong;James Baldini;Tom J. Challands;Darren R. Gröcke

  • High frequency eustatic sea-level changes during the Middle to early Late Ordovician of southern Jordan: Indirect evidence for a Darriwilian Ice Age in Gondwana

    Brian R. Turner;Howard A. Armstrong;Charles R. Wilson;Issa M. Makhlouf

  • The apparatus architecture of Panderodus and its implications for coniform conodont classification

    Ivan J Sansom;Howard A Armstrong;M Paul Smith

  • Terrane evolution of the paratectonic Caledonides of northern Britain

    H. A. Armstrong;A. W. Owen

  • Rare earth geochemistry of Arenig cherts from the Ballantrae Ophiolite and Leadhills Imbricate Zone, southern Scotland: implications for origin and significance to the Caledonian Orogeny

    H. A. Armstrong;A. W. Owen;J. D. Floyd

  • Reconciling the Intertropical Convergence Zone, Himalayan/Tibetan tectonics, and the onset of the Asian monsoon system.

    Mark B. Allen;Howard A. Armstrong

Frequent Co-Authors

Mark Williams
Mark Williams University of Leicester
Jonathan Imber
Jonathan Imber Durham University
Jan Zalasiewicz
Jan Zalasiewicz University of Leicester
David A. T. Harper
David A. T. Harper Durham University
Mark B. Allen
Mark B. Allen Durham University
Koen Sabbe
Koen Sabbe Ghent University
Angela L. Coe
Angela L. Coe The Open University
Thomas Servais
Thomas Servais University of Lille
Ken McCaffrey
Ken McCaffrey Durham University
Florentin Paris
Florentin Paris University of Rennes

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