Publikationer

Abstract: A large, well-preserved vertebrate coprolite was found in a lacustrine sediment in the Malmros Klint Formation of the Late Triassic Fleming Fjord Group in the Jameson Land Basin, central East Greenland. The size and internal and external morphology of the coprolite is consistent with that of crocodilian coprolites and one end of the coprolite exhibits evidence of post-egestion trampling. As the associated vertebrate fauna of the Fleming Fjord Group contains abundant remains of pseudosuchian phytosaurs, the coprolite is interpreted as being from a large phytosaur.

Keywords: Late Triassic, coprolite, phytosaur, East Greenland.

Addresses: Jesper Milàn [jesperm [at] oesm [dot] dk], Geomuseum Faxe, Østsjællands Museum, Rådhusvej 2, DK-4640 Faxe, Denmark. Octávio Mateus [omateus [at] fct [dot] unl [dot] pt], GEOBIOTEC, Departa-mento de Ciências da Terra, FCT-UNL Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Portugal & Museu da Lourinhã, Portugal. Malte Mau [malm [at] ign [dot] ku [dot] dk], Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark. Arka Rudra [arudra [at] geo [dot] au [dot] dk], Lithospheric Organic Carbon (L.O.C) group, Department of Geosciences, Aarhus Uni-versity, Aarhus, Denmark. Hamed Sanei [sanei [at] geo [dot] au [dot] dk], Lithospheric Organic Carbon (L.O.C) group, Department of Geosciences, Aarhus University, Aarhus, Denmark. Lars B. Clemmensen [larsc [at] ign [dot] ku [dot] dk], Department of Geosciences and Natural Resource Manage-ment, University of Copenhagen, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark.
Corresponding author: Jesper Milàn

Abstract: The eminent palaeontologist and Greenland explorer Claus Heinberg was born in 1945 and died in 2021 after prolonged illness. His scientific production was focused on two remarkably different subjects: the bivalve fauna of the Cretaceous–Palaeogene (K–T) boundary beds and the Mesozoic geology and stratigraphy of eastern North Greenland. He was employed at Roskilde University during most of his career until he retired in 2012. He was part of a cross disciplinary collaborative environment, comprising biologists, geographers, geologists, sociologists, civil engineers and architects. He was a highly engaged social debater of a wide spectrum of societal subjects throughout his life. He was a fine person, a good colleague and friend.

Keywords: Jurassic trace fossils, East and eastern North Greenland, bivalves K–T boundary, Stevns Klint.

Addresses: Finn Surlyk [finns [at] ign [dot] ku [dot] dk], Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark. Eckart Håkansson [eckart [dot] hakansson [at] uwa [dot] edu [dot] au], Centre for Energy Geoscience, School of Earth Science, University of Western Australia, 35 Stirling Highway, Crawley WA 6009, Australia. Peder W. Agger [pa [at] ruc [dot] dk], Amaliegade 32,4, DK-1256 Copenhagen K, Denmark.

Abstract: The Faxe limestone quarry in eastern Denmark exposes Danian (Lower Paleocene) cool-water carbonate deposits. They constitute remnants of an apparent build-up that covers about 12 km2 today. The Danian deposits at Faxe are conspicuous due to their pronounced thickness of coral limestone relative to the regional carbonate system.
In the Faxe quarry, scleractinian corals are uniquely exposed in up to 30 m high mounds. The rapid accumulation of scleractinians combined with induration of the mounds may locally have protected the limestone from Quaternary glacial erosion and created a Danian thickness anomaly at Faxe.
The position of Faxe above a local fault-bounded basement high and the extent of coral limestone has been better defined by new mapping. A mapped lithostratigraphic surface in the quarry reveals the large-scale organisation of nested bryozoan mounds on three elongated ridges striking NW–SE. The main scleractinian coral mounds are located above this horizon. Data for reservoir characterisation, mainly of the bryozoan mounds, were collected as photographs of the outcrop, petrophysical and petrographical data from cored boreholes, and as ground-penetrating radar sections.
Old boreholes and measured sections were used to reconstruct the build-up, and new nannofossil data allow a discussion of stratigraphy and accumulation rate. The petrophysical data show that common mound-building bryozoan packstone has higher permeability and lower capillary entry pressure than chalk, whereas less commonly occurring grain-dominated packstone and grainstone deposits from local higher-energy sites of the mound complex were found to have reduced amounts of coccolith mud, significantly higher permeability and a higher degree of lithification.
Based on biostratigraphic age constraints, correlation of flint – limestone couplets and recog-nised hierarchical patterns, we develop a cyclostratigraphy for the middle Danian and suggest that cyclicity in lithology and petrophysical characteristics of bryozoan limestone are controlled by precession and eccentricity of the orbit of the Earth.

Keywords: Bryozoan limestone, cyclostratigraphy, Danian, mounds, porosity, permeability, structure maps.

Addresses: Jens Martin Hvid [jens [dot] martin [dot] hvid [at] lyse [dot] net], Technical University of Denmark, Depart-ment of Civil Engineering, DK-2800 Kgs. Lyngby, Denmark; present address: Vågedals-veien 43, 4020 Stavanger, Norway. Frans van Buchem [fransvanbuchem [at] gmail [dot] com], King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia. Frank Andreasen [radarteknik [at] yahoo [dot] com], Nakskovvej 16, DK-4000 Roskilde, Denmark. Emma Sheldon [es [at] geus [dot] dk], Geological Survey of Denmark and Greenland, Øster Voldgade 10, DK-1350, Copenhagen K, Denmark. Ida Lykke Fabricius [ilfa@byg. dtu.dk], Technical University of Denmark, Department of Civil Engineering, DK-2800 Kgs. Lyngby, Denmark.
Corresponding author: Ida Lykke Fabricius.

Abstract: The Furongian (upper Cambrian) trilobite-agnostoid fauna from the Alum Shale Formation of Bornholm, Denmark, is reviewed and revised. The study is based on the museum material stored at the Natural History Museum of Denmark, including the material originally monographed by C. Poulsen (1923) [Bornholms Olenuslag
og deres fauna. Danmarks Geologiske Undersøgelse II. Række, Vol. 40, 83 pp]. A total of 8502 specimens, mostly disarticulated sclerites, have been registered. The taxonomy of all species is updated and the best preserved specimens are illustrated. A total of 39 olenid and 5 agnostoid taxa (incl. the Miaolingian Agnostus pisiformis)
are recorded including one new species, Ctenopyge magna n. sp. Two specimens of Ctenopyge, treated in open nomenclature as Ctenopyge sp. 1 and sp. 2, may also represent new species. 14 taxa have not been previously reported from Bornholm, viz. Ctenopyge ahlbergi, Ctenopyge tumidoides, Eurycare brevicauda, Leptoplastus abnormis, Leptoplastus crassicornis, Olenus transversus, Parabolina lobata praecurrens, Peltura acutidens,
Peltura minor, Peltura westergaardi, Protopeltura planicauda, Protopeltura praecursor, Pseudagnostus leptoplastorum? and Sphaerophthalmus drytonensis. Ctenopyge pecten and Ctenopyge affinis are also new to Bornholm as the material formerly described under these names represent Ctenopyge tenuis and C. magna n. sp., respectively. Lotagnostus americanus, Ctenopyge fletcheri, Sphaerophthalmus alatus and Triangulopyge humilis
were described under different names by C. Poulsen (1923). Peltura westergaardi and Ctenopyge tenuis are elevated from subspecies to species rank. A redescription of Leptoplastus bornholmensis is presented; the species is transferred to Eurycare. The identification of isolated skeletal parts of L. abnormis and Leptoplastus ovatus and
Sphaerophthalmus flagellifer and S. drytonensis are remarked on. The presence of three agnostoid and 14 trilobite zones is confirmed by fossils and all six Furongian superzones are developed on Bornholm. At least the Leptoplastus
paucisegmentatus and Leptoplastus raphidophorus zones seem to be absent. Other undocumented zones may be unfossiliferous, not exposed or truly absent. Three different trilobite assemblages (potential subzones) are discerned in the Peltura acutidens– Ctenopyge tumida Zone; Ctenopyge tumidoides and Sphaerophthalmus angustus
range into the basal part of this zone. All exposures of the Furongian Alum Shale Formation along the Læså and Øleå streams on southern Bornholm are briefly described including GPS coordinates.

Keywords: Furongian, biostratigraphy, taxonomy, trilobites, olenids, Alum Shale, Bornholm, Denmark.

Addresses: Arne Thorshøj Nielsen [arnet [at] ign [dot] ku [dot] dk], Department of Geosciences and Natural Resource
Management, University of Copenhagen, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark. Line Frigaard Andersen [line [dot] frigaard [at] gmail [dot] com], Tølløsevej 2, 1. TH, DK-2700 Brønshøj, Denmark.

Abstract: The predominantly Cretaceous gastropod genus Vanikoropsis Meek, 1876 is represented in the Paleocene of Denmark and West Greenland by four species, of which three are established herein as new, viz. Vanikoropsis mortenseni n. sp., Vanikoropsis (s.l.) jakobseni n. sp. and Vanikoropsis (s.l.) bashforthi n. sp. The Danish species was found in a boulder of Kerteminde Marl (Selandian, middle Paleocene) from Gundstrup, while the species from West Greenland were found in the localities Sonja Lens and Qaarsutjægerdal on the Nuussuaq peninsula (late Danian, early Paleocene). The Danish species extends the stratigraphic range of the genus into the middle
Paleocene and supports the affinities of the Kerteminde Marl fauna to the Paleocene fauna of West Greenland.

Keywords: Gastropoda, Vanikoridae, Vanikoropsis, Danian, Selandian, Paleocene, Kerteminde Marl, Denmark, Nuussuaq, West Greenland.

Addresses: Kai Ingemann Schnetler [i [dot] schnetler [at] mail [dot] dk], Fuglebakken 14, Stevnstrup, DK-8870 Langå, Denmark. Mogens Stentoft Nielsen [rimo [at] mail [dot] dk], Dankvart Drejers Vej 42, DK-5230, Odense M, Denmark.

Abstract: A 460 m long profile of the Cretaceous–Paleogene (K–T) boundary strata at Stevns Klint was measured by the late Professor A. Rosenkrantz probably in 1944. The measured profile was inherited by Finn Surlyk around 1974 together with other original boundary data. This material was dug up in a long-forgotten drawer in connection
with detailed field work by the co-authors on the boundary succession in the late spring and summer of 2021. The profile illustrates the stratigraphy, geometry and palaeotopography of the boundary strata in unprecedented detail. The part of the cliff illustrated in the profile is today partly covered by beach ridges composed of flint rubble but is situated below the finest section of the lower Danian bryozoan mounds exposed at Stevns Klint. This coastal section is situated immediately adjacent to a large limestone quarry and was planned to be quarried away around 1937, but was saved by A. Rosenkrantz who demonstrated its great scientific and educational value to the authorities.

Keywords: Cretaceous–Paleogene boundary, K–T, K–Pg, Fiskeler Member, Cerithium Limestone Member, palaeotopography, Korsnæb.

Addresses: Alfred Rosenkrantz † Finn Surlyk [finns [at] ign [dot] ku [dot] dk], Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark. Kresten Anderskouv [ka [at] ign [dot] ku [dot] dk], Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark. Peter Frykman [pfr [at] geus [dot] dk], GEUS, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark. Lars Stemmerik [ls [at] geus [dot] dk], GEUS, Øster Voldgade 10, DK-1350
Copenhagen K, Denmark. Nicolas Thibault [nt [at] ign [dot] ku [dot] dk], Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, DK- 1350 Copenhagen K, Denmark.
† Deceased 1974.
Corresponding author: Finn Surlyk