Hans Arne Nakrem

Selected publications

• Nakrem, Hans Arne & Orchard, Michael J. (2023). Conodonts from the Grippia niveau bonebed (Lower Triassic, Spathian), Spitsbergen, Arctic Norway. Lethaia: An International Journal of Palaeontology and Stratigraphy. ISSN 0024-1164. 56(4). doi: 10.18261/let.56.4.7.
• Nakrem, Hans Arne; Lindemann, Franz-Josef; Hurum, Jørn Harald & Hammer, Øyvind (2023). Fossils From the Arctic in the Collections of the Natural History Museum in Oslo, Norway. Collections: A Journal for Museum and Archives Professionals. ISSN 1550-1906. 19(3). doi: 10.1177/15501906231159039.
• Kröger, Björn; Ernst, Andrej; Penny, Amelia; Nakrem, Hans Arne & Toom, Ursula (2023). Scale dependent diversity of bryozoan assemblages in the reefs of the Late Ordovician Vasalemma Formation, Estonia. Lethaia: An International Journal of Palaeontology and Stratigraphy. ISSN 0024-1164. 56(2). doi: 10.18261/let.56.2.7.
• Høyberget, Magne; Ebbestad, Jan Ove R.; Funke, Bjørn; Funke, May-Liss Knudsen & Nakrem, Hans Arne (2023). The Skyberg Lagerstätte from the Mjøsa area, Norway: a rare window into the late early Cambrian biodiversity of Scandinavia. Lethaia: An International Journal of Palaeontology and Stratigraphy. ISSN 0024-1164. 56(2), p. 1–28. doi: 10.18261/let.56.2.4.
• Lindemann, Franz-Josef; Lindskog, Anders; Doyle, Peter; Stouge, Svend & Nakrem, Hans Arne (2023). Lethaia and Fossils and Strata are Open Access. In Nakrem, Hans Arne & Husås, Ann Mari (Ed.), NGF 34. Geological Winter Meeting. January 4-6. 2023, Abstract volume . Norsk Geologisk Forening. ISSN 978-82-8347-052-9. p. 54–55.
• Høyberget, Magne; Ebbestad, Jan Ove R.; Funke, Bjørn; Funke, May-Liss Knudsen & Nakrem, Hans Arne (2023). A preliminary report on The Skyberg Biota, a new lower Cambrian Lagerstätte from the Mjøsa area in Norway. In Nakrem, Hans Arne & Husås, Ann Mari (Ed.), NGF 34. Geological Winter Meeting. January 4-6. 2023, Abstract volume . Norsk Geologisk Forening. ISSN 978-82-8347-052-9. p. 42–42.
• Lee, Sangmin; Shi, G.R.; Nakrem, Hans Arne; Woo, Jusun & Tazawa, Jun-Ichi (2022). Mass extinction or extirpation: Permian biotic turnovers in the northwestern margin of Pangea. Geological Society of America Bulletin. ISSN 0016-7606. 134(9-10), p. 2399–2414. doi: 10.1130/B36227.1. Full text in Research Archive
• Bang, Emil; Nakrem, Hans Arne; LITTLE, CRISPIN T.S.; Kürschner, Wolfram Michael; Kelly, Simon R.A. & Smelror, Morten (2022). Palynology of Early Cretaceous (Barremian to Aptian) hydrocarbon (methane) seep carbonates and associated mudstones, Wollaston Forland, Northeast Greenland. Acta Palaeobotanica. ISSN 0001-6594. 62(1), p. 11–23. doi: 10.35535/acpa-2022-0002. Full text in Research Archive
• Kwon, Hyosang; Woo, Jusun; Oh, Jae-Ryong; Joo, Young Ji; Lee, Sangmin & Nakrem, Hans Arne [Show all 7 contributors for this article] (2022). Responses of the biogeochemical sulfur cycle to Early Permian tectonic and climatic events. Earth and Planetary Science Letters. ISSN 0012-821X. 591, p. 1–11. doi: 10.1016/j.epsl.2022.117604. Full text in Research Archive
• Ernst, Andrej & Nakrem, Hans Arne (2021). Two trepostome bryozoans from the Assistance Formation (Permian, Roadian) near Lake Hazen, Ellesmere Island, Canada. Current Biology. ISSN 0960-9822. doi: 10.1080/11035897.2021.1989716. Full text in Research Archive
• Rønning, K.J; Bruton, David Lawrence; Harper, A.T; Høyberget, Magne; Maletz, J & Nakrem, Hans Arne (2020). A Cambrian–Ordovician boundary section in the Rafnes–Herøya submarine tunnel, Skien–Langesund District, southern Norway . Norwegian Journal of Geology. ISSN 2387-5844. 100(15). doi: 10.17850/njg100-3-3. Show summary

  Rock specimens and contained fossils collected in 1976 from a submarine tunnel driven between Herøya and Rafnes in the Skien–Langesund area of southern Norway, have been restudied. The contained fossils include olenid and agnostoid trilobites, graptolites and brachiopods, groups described in detail for the first time from the area and documenting a Cambrian–Ordovician boundary section unique in the district where the upper Cambrian Alum Shale Formation is elsewhere overlain by the Middle Ordovician Rognstranda Member of the Huk Formation (Kundan in terms of Baltoscandian chronostratigraphy). The hiatus at the base of the Huk Formation is thus smaller in the section described herein, beginning at a level within rather than below the Tremadocian. Estimated thickness of the Alum Shale includes 10–12 m of Miaolingian and 20–22 m of Furongian strata with trilobite zones identified, and a Tremadocian section of 8.1 m identified by species of the graptolite Rhabdinopora in the basal 2.6 m and Bryograptus ramosus at the top. The Tremadocian section is preserved in a postulated zone of synsedimentary subsidence along the Porsgrunn–Kristiansand Fault Zone, while at the same time there was extensive erosion across an emergent, level platform elsewhere in the Skien–Langesund District and the southern part of the Eiker–Sandsvær District to the north. Aspects of stratigraphy and tectonics are highlighted together with a discussion on the Cambrian–Ordovician boundary locally and worldwide.

• Nakrem, Hans Arne; Sorento, Tone; Olaussen, Snorre & Stemmerik, Lars (2019). Depositional environment control on bryozoan faunas, Early Permian (Artinskian) Gipshuken Formation, Spitsbergen, Arctic Norway. Australasian Palaeontological Memoirs. ISSN 2205-8877. 52, p. 101–107. doi: 10.1111/sed.12640.
• Lee, Sangmin; Shi, GR; Woo, Jusun; Park, Tae-Yoon S; Oh, Jae-Ryong & Kim, Na Kyung [Show all 8 contributors for this article] (2019). Permian spiriferellid brachiopods from northern Pangaea: taxonomy, biostratigraphy, macroevolution and implications for palaeoenvironmental and palaeobiogeographical reconstructions. Journal of Systematic Palaeontology. ISSN 1477-2019. doi: 10.1080/14772019.2019.1570569.
• Delsett, Lene Liebe; Druckenmiller, Patrick Scott; Hammer, Øyvind; Hryniewicz, Krzysztof; Knutsen, Espen Madsen & Koevoets, Maayke Jacqueline [Show all 9 contributors for this article] (2019). Mesozoic marine reptiles from Spitsbergen and their ecosystems. Geology Today. ISSN 0266-6979. 35(1), p. 20–25. doi: 10.1111/gto.12256. Full text in Research Archive

View all works in Cristin

• Nakrem, Hans Arne & Husås, Ann Mari (2023). NGF 34. Geological Winter Meeting. January 4-6. 2023, Abstract volume . Norsk Geologisk Forening. ISBN 978-82-8347-052-9. 2023(1). 116 p.
• Nakrem, Hans Arne & Husås, Ann Mari (2020). 34th Nordic Geological Winter Meeting. Oslo, January 8.-10. 2020. Abstract volume. Norsk Geologisk Forening. ISBN 978-82-8347-018-5. 239 p.
• Nakrem, Hans Arne & Husås, Ann Mari (2019). NGF Abstracts and Proceedings, the 33rd Geological winter meeting. Norsk Geologisk Forening. ISBN 978-82-8347-041-3. 111 p.

View all works in Cristin

• Nakrem, Hans Arne (2023). Kan du finne ammonitter i Norge? Paleobloggen.
• Nakrem, Hans Arne (2023). Malmøyas fantastiske geologi – 450 millioner år på 45 minutter.
• Nakrem, Hans Arne (2023). Rester fra en okkupasjon - Gjenstander.
• Nakrem, Hans Arne (2023). Geologisk rundtur, Semsvannet, Asker, «Tidsaksen på Sem» som del av Asker kulturfestival 2023.
• Kröger, Björn; Ernst, Andrej; Penny, Amelia; Nakrem, Hans Arne & Toom, Ursula (2023). Diversity and spatial turnover of bryozoan assemblages in the reefs of the Vasalemma Formation (Late Ordovician), Estonia. . Show summary

  The reefs of the Vasalemma Formation, late Sandbian, Late Ordovician, of northern Estonia contain an exceptionally rich and abundant bryozoan fauna. They are an example of contemporaneous bryozoan-rich reefs known from around the world, representing the peak diversification interval of this group during the Ordovician. The diversification is associated with global climatic cooling and increasing atmospheric and sea water oxygenation. However, the mechanisms that led to the bryozoan diversification are poorly known. Here we estimate the bryozoan richness (α and γ diversity) and turnover (β diversity) at the level of samples, reefs, and formations in the Vasalemma Formation. The resulting richness and turnover values differ among the three observational levels and hence are scale dependent. A pattern with lowest between-reef turnover and relatively high between-sample turnover could be detected, reflecting high small-scale (within reef) heterogeneities in lithology and original bryozoan habitat. This is consistent with the hypothesis that small-scale substrate heterogeneity was the most important diversification driver in the Vasalemma Formation.

• Hurum, Jørn Harald & Nakrem, Hans Arne (2023). Rester fra en okkupasjon. Fortid. ISSN 1504-1913. 2023(2), p. 22–24.
• Nakrem, Hans Arne (2023). Geoturisme. Marokkos fosfatforekomster, vel verdt et besøk. Geonytt. ISSN 0802-6173. 28(3), p. 16–19.
• Nakrem, Hans Arne (2023). Etterlysning: Silurkalk på Hardangervidda. Geonytt. ISSN 0802-6173. 28(3), p. 20–22.
• Nakrem, Hans Arne (2023). Kampen for tilværelsen. Geonytt. ISSN 0802-6173. 28(4), p. 23–26.
• Amundsen, Madelen; Hammer, Øyvind & Nakrem, Hans Arne (2023). Massedød hos trilobitter, ordovicium, Marokko. Stein. ISSN 0802-9121. 2023(4), p. 18–22.
• Nakrem, Hans Arne (2022). Open Science Lunch: Enabling reuse of non-digital data.
• Nakrem, Hans Arne (2022). Fant veldig sjeldne steiner. [Newspaper]. Aftenposten Junior.
• Nakrem, Hans Arne (2022). Geologiens dag - samarbeide mellom Norsk Geologisk Forening og NHM.
• Nakrem, Hans Arne (2022). Monsterøgler og dinosaurer, Verdens Kuleste Dag.
• Nakrem, Hans Arne (2022). Dinosauren som kunne svømme - og litt til fra Marokko.
• Nakrem, Hans Arne (2022). Geologisk omvisning på Steilene for Follo geologiforening.
• Nakrem, Hans Arne (2022). Geologisk feltomvisning, Oslofeltet, for skoleklasse fra St.Olavs VGS Stavanger .
• Nakrem, Hans Arne (2022). Omvisning i de nye geologiske utstillingene for Fredrikstad og omegn geologforening.
• Nakrem, Hans Arne (2022). Omvisning i de geologiske laboratoriene og samlingene, Økern.
• Nakrem, Hans Arne (2022). Omvisning i de nye geologiske utstillingene for "Collecting Norden".
• Nakrem, Hans Arne (2022). Omvisning i de nye geologiske utstillingene for Norsk Geologisk Forening.
• Nakrem, Hans Arne (2022). Omvisning i de nye geologiske utstillingene for Follo Geologiforening.
• Bjureke, Kristina & Nakrem, Hans Arne (2022). Botanikk og geologi på Ola Narr. Vandring ute.
• Nakrem, Hans Arne (2022). Permian bryozoans from Svalbard – a review. Show summary

  Bryozoans together with brachiopods and crinoids are the main faunal elements through the Permian succession of Svalbard, Arctic Norway. The lower Permian mainly warm water carbonate rocks contain cosmopolitan palaeostomate taxa. Typical genera here are Coscinium, Ascopora, Rhabdomeson, as well as various fenestrates and trepostomes. The shallow-water evaporitic sequence contains very few bryozoans like the endemic trepostome Toulapora. The upper part, with predominantly cold water siliceous deposits contain taxa typical of the “Boreal” region (today’s Svalbard, Greenland, Canadian- and Russian Arctic) like Ramipora, Permoheloclema, Primorella, and Clausotrypa. The biostratigraphic dating is based on fusulinids and conodonts in the lower part, whereas the upper part is less well age constrained. More work is in the pipeline, e.g. the youngest faunas are not systematically described yet, nor is the rich bryozoan fauna from the island Bjørnøya. Permian bryozoans from stratigraphic cores in the Barents shelf strata are soon open for systematic descriptions.

• Nakrem, Hans Arne & Sørgaard, Knut (2022). Lindøya i indre Oslofjord, en geologisk rusletur. Geonytt. ISSN 0802-6173. p. 23–29. Show summary

  Lindøyas geologiske fortid er en spennende historie som strekker seg nesten ½ milliard år tilbake i tid. Bergartene på øya vitner om utdødde livsformer, voldsomme jordskjelv og vulkanutbrudd, og dramatiske klimavariasjoner – fra tropisk hav, via ørken til istid. Skuer man nord- og vestover fra Lindøya så ser man Nordmarkas granitter i form av bølgende skogkledte åser, mens Nesodden i sørvest består av eldgammel gneis – aldersforskjellen på disse landskapene er ufattelige én milliard år! Her presenterer vi noen av de geologiske høydepunktene på Lindøya, samt forslag til lokaliteter som kan besøkes.

• Knarud, Ragnar; Mørk, Atle; Nakrem, Hans Arne & Olaussen, Snorre (2022). David Worsley (1943-2022). Geonytt. ISSN 0802-6173. 27(2), p. 14–17.
• Nakrem, Hans Arne (2022). Fossiljakt i Nasjonalmuseet i Oslo. Geonytt. ISSN 0802-6173. 27(2), p. 12–13.
• Eriksen, Maiken & Nakrem, Hans Arne (2022). Trilobittenes massegrav. Geonytt. ISSN 0802-6173. 27(1), p. 13–19.
• Guttormsen, Julie & Nakrem, Hans Arne (2022). Blekksprutfeltet i Slemmestad. Stein. ISSN 0802-9121. 49(1), p. 36–40.
• Nakrem, Hans Arne (2022). Graptolittene i Slemmestad. Stein. ISSN 0802-9121. 49(1), p. 27–30.
• Nakrem, Hans Arne; Hurum, Jørn Harald & Delsett, Lene Liebe (2022). Geologien i Slemmestadområdet. Stein. ISSN 0802-9121. 1, p. 7–13.
• Nakrem, Hans Arne (2021). Geologiens dag - «Nyttige mineraler», samarb. NGF og NHM .
• Nakrem, Hans Arne (2021). En 480 millioner år gammel massegrav fra Marokko.
• Nakrem, Hans Arne (2021). Fossiler fra Nansens Fram-ekspedisjon.
• Knarud, Ragnar & Nakrem, Hans Arne (2021). Hva kan steinene i “Steinhuset” på Granavollen fortelle oss? Geonytt. ISSN 0802-6173. 26(4), p. 4–16.
• Nakrem, Hans Arne (2021). 100 år etter Olaf Holtedahls ekspedisjon til Novaja Zemlja. Geonytt. ISSN 0802-6173. 26(4), p. 28–31.
• Nakrem, Hans Arne (2021). Nansens snegler – dagsaktuelle objekter i samlingene.
• Nakrem, Hans Arne (2021). Dinosaurdag.
• Nakrem, Hans Arne (2021). Forskningsfronten: Klimakriser i et geologisk perspektiv.
• Nakrem, Hans Arne (2021). Professor Olaf Holtedahl's expedition to Novaya Zemlya in 2021.
• Nakrem, Hans Arne (2021). Novaja Zemlja – et tilbakeblikk på Olaf Holtedahls ekspedisjon for 100 år siden.
• Rønning, Knut Johan; Bruton, David Lawrence; Harper, David A.T.; Høyberget, Magne; Maletz, Jörg & Nakrem, Hans Arne (2021). A Cambrian–Ordovician boundary section in the Rafnes–Herøya sub-marine tunnel, Skien–Langesund District, southern Norway. Show summary

  Rock specimens and contained fossils collected in 1976 from a submarine tunnel driven between Herøya and Rafnes in the Skien–Langesund area of southern Norway, have been restudied. The contained fossils include olenid and agnostoid trilobites, graptolites and brachiopods, groups described in detail for the first time from the area and documenting a Cambrian–Ordovician boundary section unique in the district where the upper Cambrian Alum Shale Formation is elsewhere overlain by the Middle Ordovician Rognstranda Member of the Huk Formation (Kundan in terms of Baltoscandian chronostratigraphy). The hiatus at the base of the Huk Formation is thus smaller in the section described herein, beginning at a level within rather than below the Tremadocian. Estimated thickness of the Alum Shale includes 10–12 m of Miaolingian and 20–22m of Furongian strata with trilobite zones identified, and a Tremadocian section of 8.1 m identified by species of the graptolite Rhabdinopora in the basal 2.6 m and Bryograptus ramosus at the top. The Tremadocian section is preserved in a postulated zone of synsedimentary subsidence along the Porsgrunn–Kristiansand Fault Zone, while at the same time there was extensive erosion across an emergent, level platform elsewhere in the Skien–Langesund District and the southern part of the Eiker–Sandsvær District to the north.

• Bang, Emil; Smelror, Morten; Kürschner, Wolfram Michael & Nakrem, Hans Arne (2021). Palynology of Early Cretaceous hydrocarbon seep carbonates from Wollaston Forland, Northeast Greenland – preliminary results.
• Nakrem, Hans Arne (2020). Av hensyn til publikum. Geo. ISSN 1500-8371. 59(7), p. 50–50.
• Nakrem, Hans Arne (2020). Darwins fossiler.
• Nakrem, Hans Arne (2020). Geologisk tur for publikum til Malmøya.
• Nakrem, Hans Arne (2020). Geologisk sykkeltur i Oslo sentrum.
• Nakrem, Hans Arne (2020). «Iguanodondag». Besøkssenter våtmark Oslo og Østensjøvannets Venner.
• Nakrem, Hans Arne (2020). Eksepsjonelle fossiler i Marokko kobler den kambriske eksplosjonen til den ordoviciske radiasjonen. Biolog. ISSN 0801-0722. 38(2), p. 32–37. Show summary

  Eksepsjonelt godt bevarte fossiler er de viktigste verktøyene når paleontologer og paleobiologer skal rekonstruere tidligere tiders liv, evolusjonære historier og hvordan også økosys¬temene har endret seg gjennom millioner av år. Fra tidlig i kambrium til midt i ordovicium «eksploderte» biodiversiteten på vår klode. Først ved at de fleste rekkene (fyla) kom på plass gjennom den kambriske eksplosjonen (midtre kambrium, 535-515 millioner år siden) og deretter ved at artsmangfoldet skjøt fart tidlig i ordovicium, gjennom det som paleontolo¬gene kaller «The Great Ordocician Biodiversification Event» (GOBE, 485-465 millioner år siden). Tradisjonelt så har disse episodene blitt behandlet som separate hendelser, de merkelig dyrene fra kambrium «forsvant» og en ny biota kom i ordovicium. Men nå viser det seg at en helt nyfunnet, unik lagrekke fra tidlig ordovicium i Marokko med usedvanlig godt bevarte fossiler kobler disse hendelsene sammen. Kam¬briske former fortsatte videre, og mer «moderne» organismer dukket opp mye tidligere enn forventet. Fezouata i sørøstlige Marokko er nøkkelen til ny kunnskap!

• Nakrem, Hans Arne (2020). Pre-kambrisk liv: en spektakulær stromatolittforekomst fra Marokko. Naturen. ISSN 0028-0887. 2020(4), p. 136–141. Show summary

  Stromatolitter er lagdelte geologiske strukturer dannet av mikrober (vanligvis cyanobakterier), éncellede alger, finkornete sedimentpartikler og utfelte mineraler. De vekslende lagene er godt synlige for det blotte øye. De er de eldste godt synlige fossile strukturene; man kjenner der til forekomster som er minst 3,7 milliarder år gamle. I Marokko kan man besøke en spektakulær forekomst av stromatolitter, som dekker et område på ca. 800 x 2000 meter, der man kan spasere i et innsjømiljø som eksisterte for omtrent 550 millioner år siden og studere fossile stromatolitter i tre dimensjoner. Introduksjon

• Nakrem, Hans Arne (2020). Nord-Afrikas ikoniske dinosaur: kjøttetende gigant med imponerende ryggseil. Geo. ISSN 1500-8371. 2020(5), p. 10–16.
• Nakrem, Hans Arne (2020). Verneverdige lokaliteter vandaliseres. Oslofeltets historske ekskursjonslokaliteter forvitrer etter offentlige inngrep. Geo. ISSN 1500-8371. 2020(6), p. 57–57.
• Nakrem, Hans Arne (2020). Bokanmeldelse – dypdykk i Oslofeltet ”Under asfalten. Oslos naturhistorie gjennom to milliarder år” av Henrik Svensen. Geo. ISSN 1500-8371. 2020(6), p. 6–6.
• Nakrem, Hans Arne (2020). En feltrapport fra Nordøst-Grønland - jakt på spennende fossiler fra krittperioden.
• Nakrem, Hans Arne (2020). Early Cretaceous hydrocarbon seep carbonates from Wollaston Forland, Northeast Greenland.
• Hurum, Jørn Harald; Delsett, Lene Liebe; Hammer, Øyvind & Nakrem, Hans Arne (2020). 15 years with the Spitsbergen Mesozoic Research Group. NGF Abstracts and Proceedings of the Geological Society of Norway. 1, p. 98–98. Show summary

  15 years with the Spitsbergen Mesozoic Research Group Hurum, J. H.*, Delsett, L.L., Hammer, Ø. & Nakrem, H.A. Natural History Museum, University of Oslo, Norway. *Email: j.h.hurum@nhm.uio.no When dinosaurs ruled on land the apex predators in the ocean were marine reptiles. From the Arctic archipelago of Svalbard, the Spitsbergen Mesozoic Research Group has excavated numerous well preserved marine reptile skeletons in order to understand the biology of these animals and the environment they lived in. The work of twelve field seasons since 2004 has made this one of the largest and most productive paleontological research projects in the high Arctic world-wide. The initial eight seasons focused on one of the richest occurrences of Late Jurassic—earliest Cretaceous (c. 150–139 Ma) marine reptiles in the world, and nearly sixty specimens have been collected, together with a diverse assemblage of invertebrates. The last four seasons were spent investigating events further back in time, as Spitsbergen preserves the remains from some of the first marine reptile radiations in the wake of the most devastating extinction in the history of the Earth, at the Permian–Triassic boundary (c. 252 Ma). The international research group published their first scientific results in 2012, followed by a steady stream of publications in the years since. Collectively, it has contributed significantly to the understanding of marine ecosystems at the Jurassic–Cretaceous boundary and is starting to yield results about life’s recovery in the first millions of years after the Permian–Triassic extinction. Outreach has been a major part of the project from the very beginning, both because it is important to share these scientific results with the public, but also because it attracts funding. Alternative financial support and a lot of determination have been crucial components for the success of this long term research project. This has been made possible through cooperation with a local tourist agency and the petroleum industry, grants from the National Geographic Society, income from public lectures and personal sponsors.

• Nakrem, Hans Arne; Little, Crispin T.S. & Kelly, Simon R.A. (2020). Early Cretaceous hydrocarbon seep carbonates from Wollaston Forland, Northeast Greenland. NGF Abstracts and Proceedings of the Geological Society of Norway. 1, p. 149–149. Show summary

  Early Cretaceous hydrocarbon seep carbonates from Wollaston Forland, Northeast Greenland Nakrem, H.A.1, Little, C.T.S.2 & Kelly, S.R.A.3 1 Natural History Museum, University of Oslo, 1172 Blindern, 0318 Oslo, Norway, h.a.nakrem@nhm.uio.no 2 School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK, earctsl@leeds.ac.uk 3 CASP, West Building, 181a Huntingdon Road, Cambridge CB3 ODH, UK, simon.kelly@casp.cam.ac.uk Methane seeps are discrete sites where fluids rich in methane flow onto the seafloor. First discovered in 1984, they are now known from all the World’s oceans. Methane seeps support highly unusual biological communities where the primary energy source for these ecosystems is not solar, but reduced chemicals, such as methane and hydrogen sulphide. The current project focuses on methane-derived carbonate bodies in the Kuhnpasset Beds, which are Late Barremian (Early Cretaceous) aged silty mudstones, cropping out on Wollaston Forland, Northeast Greenland (Kelly et al. 2000). The Kuhnpasset Beds contain a sparse mollusk fauna whereas the carbonate bodies contain an unusual faunal assembage dominated by large bivalves, including the lucinid Cryptolucina kuhnpassetensis, the modiomorphid Caspiconcha whithami and Solemya. In addition there are ammonites, belemnites, nautiloids, and abundant driftwood, sometimes bored by the bivalve Turnus. Recent field work has revealed that in addition to that published there is a much richer macrofauna, including thyasirid bivalves, scaphopods and a diversity of gastropod species. The carbonate bodies have calcite cemented tube systems, zoned calcite crusts and sparite void fills. The carbonate bodies formed on the seafloor in a mid- to outer shelf situation at the end of a period of extensional rifting on the eastern Greenland passive Atlantic margin. The underlying faults may have acted as migration pathways for methane migration to the seafloor. The source rocks for this methane were probably the underlying Late Jurassic black shales at depths of <600-1200 m. Material from the 2019 field work will be subjected to systematic treatment of the rich macrofossil material, microfacies analysis, as well as micropalaeontogical analsysis (palynology and foraminiferans). C and O isotope analysis will be performed on the seep carbonates, which will give important information about the sources of the methane. The palaeontological data from the Northeast Greenland seeps will be compared with Upper Jurassic – Lower Cretaceous methane seeps from Svalbard (Hryniewicz et al. 2015a), the Canadian Arctic (Beauchamp & Savard 1992) and Novaya Zemlya (Russian Arctic) (Hryniewicz et al. 2015b), in an integrated taxonomic, palaeobiogeographic and palaeoclimate modelling study. References : Beauchamp, B. & Savard, M., 1992. Palaios 7, 434–450. Hryniewicz, K., Nakrem, H.A., Hammer, Ø., Little, C.T.S., Kaim, A., Sandy. M. & Hurum, J.H. 2015a. Lethaia 48(3), 353-374. Hryniewicz, K., Hagström, J., Hammer, Ø., Kaim, A., Little, C.T.S. & Nakrem, H.A. 2015b. Palaeogeography, Palaeoclimatology, Palaeoecology 436, 231–244. Kelly, S.R.A., Blanc, E., Price, S.P. & Witham, A.G. 2000. Geological Society of London, Special Publications, London, 227–246.

• Engelschiøn, Victoria Sjøholt; Bernhardsen, Sofie; Wesenlund, Fredrik; Hurum, Jørn Harald; Hammer, Øyvind & Roberts, Aubrey Jane [Show all 9 contributors for this article] (2019). Mass death by anoxia - or an exceptional preservation interval? The Middle Triassic bivalve beds of Svalbard.
• Hurum, Jørn Harald; Nakrem, Hans Arne; Hammer, Øyvind & Delsett, Lene Liebe (2019). Gravplass i verdensformat. Geo. ISSN 1500-8371. 22(3), p. 12–18. Show summary

  Utgravninger på Svalbard gjennom 15 år har gitt overraskende og sensasjonelle oppdagelser om livets utvikling både i tidlig trias og på overgangen mellom sein jura og tidlig kritt

• Nakrem, Hans Arne (2019). Metanseep-karbonater fra Svalbard og Novaya Zemlya – og litt om betydningen av gamle museale samlinger for moderne utforskning.
• Nakrem, Hans Arne (2019). Darwins fossiler.
• Nakrem, Hans Arne (2019). Darwin og fossilene.
• Nakrem, Hans Arne (2019). Darwins geologiske oppdagelser.
• Nakrem, Hans Arne (2019). I Darwins kjølvann til Tasmania, med geologi og vin på menyen.
• Nakrem, Hans Arne (2019). Museale samlinger fra polarekspedisjoner – materiale som utgangspunkt for ny forskning.
• Nakrem, Hans Arne (2019). Verdens kuleste dag, Akershus Festning (DNB-stiftelsen).
• Nakrem, Hans Arne (2019). Geologiens Dag.
• Nakrem, Hans Arne (2019). Katastrofer og nye muligheter – Oslofeltets fossiler avslører utvikling av dyreliv over millioner år.
• Nakrem, Hans Arne (2019). Svalbard – a natural geological laboratory for research, education and outreach.
• Nakrem, Hans Arne (2019). «DINO-dag», Naturhistorisk museum, UiO.
• Nakrem, Hans Arne & Ernst, Andrej (2019). Ordovician bryozoans from the Oslo Region – preliminary findings.
• Nakrem, Hans Arne & Bøckman, Petter (2019). Darwin som geolog Etter Darwin.
• Nakrem, Hans Arne (2018). Fossildagene Slemmestad; Bygging av Iguanodon-skjelettet.
• Nakrem, Hans Arne (2018). Svalbard – et eldorado for fossilsamlere.
• Nakrem, Hans Arne (2018). Planteliv og klima på Svalbard for 50 (60-40) millioner år siden.
• Nakrem, Hans Arne (2018). Over Atlasfjellene og inn i Sahara på jakt etter fossiler, mineraler og meteoritter.
• Nakrem, Hans Arne (2018). Geologisk vandring i Tøyenområdet.
• Nakrem, Hans Arne (2018). Jurassic Park in Svalbard – monster reptiles and frosty field work.
• Nakrem, Hans Arne (2018). Bygging av Iguanodon-skjelettet.
• Nakrem, Hans Arne (2018). Geological data archiving and importance for verifiability of scientific results.
• Nakrem, Hans Arne (2018). Den kambriske eksplosjonen - evolusjon på steroider for 530 millioner år siden.
• Nakrem, Hans Arne (2018). DINO-dag, NHM, Oslo.
• Nakrem, Hans Arne (2018). Permian bryozoans in shallow drilling cores from the Barents Shelf.

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