A. Hallam

13.3k total citations · 4 hit papers
135 papers, 10.4k citations indexed

About

A. Hallam is a scholar working on Paleontology, Atmospheric Science and Geophysics. According to data from OpenAlex, A. Hallam has authored 135 papers receiving a total of 10.4k indexed citations (citations by other indexed papers that have themselves been cited), including 72 papers in Paleontology, 44 papers in Atmospheric Science and 32 papers in Geophysics. Recurrent topics in A. Hallam's work include Paleontology and Stratigraphy of Fossils (65 papers), Geology and Paleoclimatology Research (44 papers) and Geological formations and processes (27 papers). A. Hallam is often cited by papers focused on Paleontology and Stratigraphy of Fossils (65 papers), Geology and Paleoclimatology Research (44 papers) and Geological formations and processes (27 papers). A. Hallam collaborates with scholars based in United Kingdom, Czechia and United States. A. Hallam's co-authors include Paul B. Wignall, Charles R. Marshall, Alan G. Smith, B.W. Sellwood, W. D. Lang, Alastair Ruffell, N.B. Price, G. Y. Craig, Keene Swett and Brian Rosen and has published in prestigious journals such as Nature, Geochimica et Cosmochimica Acta and The American Naturalist.

In The Last Decade

A. Hallam

128 papers receiving 9.3k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Treatise on Invertebrate Paleontology

1972 925 citations A. Hallam Earth-Science Reviews profile →
Mass Extinctions and Their Aftermath

1999 698 citations A. Hallam et al. profile →
Mass Extinctions and Their Aftermath

1997 697 citations A. Hallam et al. profile →
Mass extinctions and sea-level changes

1999 557 citations A. Hallam Earth-Science Reviews profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
A. Hallam United Kingdom	47	7.0k	4.0k	2.9k	2.1k	1.7k	135	10.4k
Jan Hardenbol United States	15	4.3k 0.6×	4.8k 1.2×	3.3k 1.1×	3.6k 1.7×	2.0k 1.2×	23	9.3k
Bilal U. Haq United States	34	6.2k 0.9×	6.1k 1.5×	4.2k 1.4×	4.4k 2.1×	2.6k 1.6×	70	12.4k
Gerta Keller United States	67	8.1k 1.2×	7.9k 2.0×	4.1k 1.4×	1.7k 0.8×	831 0.5×	249	11.8k
Peter R. Vail United States	22	4.2k 0.6×	5.3k 1.3×	3.8k 1.3×	5.0k 2.4×	2.5k 1.5×	48	10.6k
David J. Bottjer United States	61	9.8k 1.4×	5.0k 1.3×	1.9k 0.7×	3.1k 1.5×	1.4k 0.8×	252	13.0k
Felix M. Gradstein Norway	29	3.8k 0.5×	3.5k 0.9×	3.3k 1.1×	1.5k 0.7×	1.4k 0.8×	106	7.7k
Andrew S. Gale United Kingdom	49	6.4k 0.9×	4.2k 1.1×	2.0k 0.7×	1.7k 0.8×	884 0.5×	235	8.5k
Christopher R. Scotese United States	44	5.0k 0.7×	3.2k 0.8×	3.9k 1.3×	1.5k 0.7×	1.7k 1.0×	114	9.9k
Nicholas Christie‐Blick United States	34	4.4k 0.6×	4.4k 1.1×	2.9k 1.0×	2.2k 1.0×	1.3k 0.8×	98	7.8k
Michael A. Arthur United States	59	8.0k 1.1×	6.5k 1.6×	2.6k 0.9×	1.4k 0.7×	1.0k 0.6×	170	12.3k

Countries citing papers authored by A. Hallam

Since Specialization

Citations

This map shows the geographic impact of A. Hallam's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by A. Hallam with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites A. Hallam more than expected).

Fields of papers citing papers by A. Hallam

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by A. Hallam. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by A. Hallam. The network helps show where A. Hallam may publish in the future.

Co-authorship network of co-authors of A. Hallam

This figure shows the co-authorship network connecting the top 25 collaborators of A. Hallam. A scholar is included among the top collaborators of A. Hallam based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with A. Hallam. A. Hallam is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

1.

Hallam, A.. (2001). A review of the broad pattern of Jurassic sea-level changes and their possible causes in the light of current knowledge. Palaeogeography Palaeoclimatology Palaeoecology. 167(1-2). 23–37. 373 indexed citations

2.

Hallam, A.. (1999). Mass extinctions and sea-level changes. Earth-Science Reviews. 48(4). 217–250. 557 indexed citations breakdown →

3.

Hallam, A.. (1993). Jurassic climates as inferred from the sedimentary and fossil record. Philosophical Transactions of the Royal Society B Biological Sciences. 341(1297). 287–296. 97 indexed citations

4.

Hallam, A.. (1990). Correlation of the Triassic-Jurassic boundary in England and Austria. Journal of the Geological Society. 147(3). 421–424. 39 indexed citations

5.

Hallam, A.. (1989). Catastrophism in geology.. 25–55. 2 indexed citations

6.

Hallam, A.. (1989). The case for sea-level change as a dominant causal factor in mass extinction of marine invertebrates. Philosophical transactions of the Royal Society of London. Series B, Biological sciences. 325(1228). 437–455. 139 indexed citations

7.

Hallam, A.. (1988). A terrestrial extinction scenario for the Cretaceous-Tertiary boundary. 7–20. 2 indexed citations

8.

Hallam, A.. (1987). Mesozoic marine organic-rich shales. Geological Society London Special Publications. 26(1). 251–261. 47 indexed citations

9.

Hallam, A., et al.. (1981). Letters of Arthur Henry Hallam. The Knowledge Bank (The Ohio State University). 7 indexed citations

10.

Hallam, A.. (1981). Methods of palaeobiogeographic analysis. Revistes Científiques de la University of Barcelona (University of Barcelona). 16(1). 65–69. 1 indexed citations

11.

Hallam, A.. (1981). Biogeographic relations between the northern and southern continents during the Mesozoic and Cenozoic. International Journal of Earth Sciences. 70(2). 583–595. 10 indexed citations

12.

Hallam, A.. (1978). Seismic stratigraphy and global changes. Nature. 272(5652). 400–400. 15 indexed citations

13.

Hallam, A.. (1977). Jurassic bivalve biogeography. Paleobiology. 3(1). 58–73. 111 indexed citations

14.

Hallam, A., et al.. (1976). De la deriva de los continentes a las tectónica de Placas. Dialnet (Universidad de la Rioja). 1 indexed citations

15.

Hallam, A.. (1971). Re-evaluation of the Palaeogeographic Argument for an Expanding Earth. Nature. 232(5307). 180–182. 20 indexed citations

16.

Hallam, A.. (1969). Tectonism and eustasy in the Jurassic. Earth-Science Reviews. 5(1). 45–68. 41 indexed citations

17.

Hallam, A.. (1968). The stratigraphy of the British Isles. Palaeogeography Palaeoclimatology Palaeoecology. 4(4). 316–317. 1 indexed citations

18.

Hallam, A. & Keene Swett. (1966). Trace fossils from the Lower Cambrian Pipe Rock of the north-west Highlands. Scottish Journal of Geology. 2(1). 101–107. 73 indexed citations

19.

Hallam, A.. (1962). The Evolution of Gryphaea. Geological Magazine. 99(6). 571–574. 6 indexed citations

20.

Hallam, A. & W. D. Lang. (1960). A sedimentary and faunal study of the Blue Lias of Dorset and Glamorgan. Philosophical transactions of the Royal Society of London. Series B, Biological sciences. 242(698). 1–44. 108 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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