A5103172075- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Geological Studies and Exploration
- Geological and Geophysical Studies
- Geological formations and processes
- Marine Biology and Ecology Research
- Geological and Geochemical Analysis
- Scientific Research and Discoveries
- Geochemistry and Elemental Analysis
- Geochemistry and Geologic Mapping
- Geological Formations and Processes Exploration
- Paleontology and Evolutionary Biology
- Evolution and Paleontology Studies
- Chemical Reaction Mechanisms
- Historical, Religious, and Philosophical Studies
- Isotope Analysis in Ecology
- Methane Hydrates and Related Phenomena
- Byzantine Studies and History
- Marine Biology and Environmental Chemistry
- Crystallization and Solubility Studies
- Insect and Arachnid Ecology and Behavior
- Thermodynamic properties of mixtures
- Ancient Mediterranean Archaeology and History
- Plant Diversity and Evolution
Lund University
2014-2023
The Ohio State University
2013
Japan External Trade Organization
2004-2005
Uppsala University
2003
TomTom (Netherlands)
1989
Dalarna University
1989
Scania (Sweden)
1989
Continuous and biostratigraphically well-constrained carbon isotope (δ13Corg) profiles through the upper Miaolingian (middle Cambrian) to Tremadocian (Lower Ordovician) part of Alum Shale Formation in four drill cores from southernmost Scandinavia are described. The sections record seven Furongian (upper excursions/spikes, which three appear valuable as auxiliary markers for identifying global stage boundaries. Steptoean Positive Carbon Isotope Excursion (SPICE) event with a magnitude up...
Abstract The Lower Cambrian strata above the Rispebjerg Sandstone in Scania (Skåne), southern Sweden are briefly described and term Gislöv Formation is introduced for them. vertical distribution of faunal elements first time. Holmia sulcata, a member kjerulfi group, Proampyx cf. linnarssoni taken to indicate presence kjerulfi-group Zone Zone. correlation discussed, inter alia on basis specimen which may belong Calodiscus lobatus. Ellipsocephalus lunatus n.sp. described. Key Words:...
Abstract Palaeobiogeographical data on Cambrian trilobites obtained during the twentieth century are combined in this paper to evaluate palaeoceanographic links through c. 30 myr, once these arthropods biomineralized. Worldwide major tectonostratigraphic units characterized at series intervals of time and datasets trilobite genera (629 for Series 2, 965 3, 866 Furongian Series) analysed using parsimony analysis endemicity. Special attention is given biogeographical observations made...
Abstract The Ordovician of Scandinavia (i.e. Denmark, Norway and Sweden) has been investigated for over two centuries and, through time, various chronostratigraphic schemes have introduced, facilitating regional correlation. However, a modern chronostratigraphy never proposed. Here, we delineate ten stages the Scandinavia, comprising, in ascending order, Slemmestadian, Ottenbyan, Billingenian, Volkhovian, Kundan, Segerstadian, Dalbyan, Moldåan, Jerrestadian Tommarpian. We propose to...
Abstract The late Cambrian Steptoean positive carbon isotope excursion (SPICE) represents a major perturbation to the global cycle and was associated with trilobite extinctions expansion of anoxic and/or euxinic water masses during episodes eustatic sea-level change. We present new Re-Os age together Os Nd stratigraphy major- trace-element data from Alum Shale Formation (Scania, Sweden). 494.6 ± 2.9 Ma is interval peak δ13Corg values, providing first radiometric constraint for this...
Abstract An Ediacaran assemblage dominated by an unidentified species of Cyclomedusa Sprigg 1947, along with Ediacaria? Beltanella Hiemalora Fedonkin 1982, and Nimbia? 1980, is described for the first time from Innerelv Member Stappogiedde Formation exposed in coastal outcrops west Tanafjorden on Digermul Peninsula, northeastern Finnmark, northern Norway. The fossil discoidal forms which share certain affinities cosmopolitan genera. Ediacaria . However, our specimens differ these other...
So far, 112 polymerid trilobite species/subspecies and 13 agnostoid have been recorded from the Furongian (upper Cambrian) of Scandinavia. For first time, their zonal occurrences are summarized in a biostratigraphical scheme serving as practical synopsis for students this interval time. Ninety-six belong to family Olenidae whereas remaining 16 distributed across eight other families. Levels increased speciation low diversity (including stratigraphical range gaps) conspicuous these may be...
The δ13Corg chemostratigraphy of the Hirnantian and lower Rhuddanian in biostratigraphically well-controlled Röstånga-1 drillcore from west-central Scania is used for an improved integration Isotope Carbon Excursion (HICE) with standard graptolite zonation. In this succession, end HICE corresponds to top range Metabolograptus persculptus. Baseline values occur uppermost Avitograptus avitus Faunal Interval as well Akidograptus ascensus Zone, isotope curve also tied Swedish Katian trilobite...
Abstract The late Ediacaran–mid Cambrian occurrences of phosphorites in the western Mediterranean region (West Gondwana) and southern Sweden (north‐west Baltica) are related to poleward drift West Gondwana northern Baltica. As a result, these regions crossed subtropical temperate palaeolatitudes Southern Hemisphere, which oceanic upwelling high organic productivity were probable sources phosphorus along their margins. A parallel south‐west/north‐east migration trend evaporites delayed, time...
A drill core through the Lower Ordovician Toyen Shale Formation at Lerhamn, NW Scania, southern Sweden, provides important new information for precise biostratigraphic resolution of Floian to lower Darriwilian time interval in Scandinavia. The Hunnegraptus copiosus, Tetragraptus phyllograptoides, Cymatograptus protobalticus (new), Baltograptus vacillans sp. cf. deflexus minutus Isograptus victoriae, Undulograptus austrodentatus (Arienigraptus zhejiangensis and sinicus Subzones) (?)...
One of the principal biostratigraphical tools used in lower Palaeozoic, and especially Cambrian System, is trilobites. Historically, both polymerids agnostoids have commonly been included as 'trilobite' groups, although currently question whether they comprise a monophyletic group or are polyphyletic unsettled. Beginning late 1800s, base System was marked by lowest occurrence olenelline Discovery rich pre-trilobite metazoan record mid-1900s led to significant modification that concept, but...
The zonation of the Furongian Alum Shale in Scandinavia, based on olenid trilobites, is reviewed and revised. current scheme rooted a detailed introduced late 1950s with subzones that subsequently have been elevated to zonal rank. Ten these zones are difficult recognize all districts, revised proposed, focused unambiguous identification throughout Scandinavia. difficulties recognizing some districts mostly relate biofacies differentiation. Representatives Ctenopyge are, for instance, common...
The Upper Cambrian faunas of Scandinavia are generally dominated by olenid trilobites, which provide a firm basis for the biostratigraphic classification. olenids tend, however, to be provincial and facies controlled. By contrast, many agnostoid genera species have nearly worldwide distribution excellent indices in Middle strata. Three distinctive geographically widely distributed known from lower part Scandinavia: Linguagnostus reconditus POLETAEVA ROMANENKO, 1970, Aspidagnostus lunulosus...
Abstract Out of the 14 agnostoid species/subspecies so far recorded from Furongian Scandinavia, seven are excellent biostratigraphical indices and important for correlation between Baltica other palaeocontinents. Glyptagnostus reticulatus , Aspidagnostus lunulosus Agnostus ( Homagnostus ) obesus first appear at base G . Zone, allowing a precise Paibian Stage into Scandinavia. Tomagnostella orientalis Pseudagnostus cyclopyge near Parabolina brevispina suggesting with uppermost through...
A palynological study of the Ordovician–Silurian boundary (Katian–Rhuddanian) succession in Röstånga-1 drillcore, southern Sweden, has been performed. The lithology is dominated by mudstone and graptolitic shale, with subordinate limestone, formed deeper marine halo Baltica. assemblages are microfossils, mainly chitinozoans acritarchs. Sparse but well-preserved cryptospores, including Tetrahedraletes medinensis, grayii Pseudodyadospora sp., were encountered Lindegård Formation (late...
Abstract Fluctuations in marine oxygen concentrations have been invoked as a primary driver for changes biodiversity throughout Earth history. Expansions reducing conditions are commonly key causal mechanisms mass extinctions, while increases oxygenation becoming an increasingly common mechanism biodiversification events. Here we utilize multiproxy approach to constrain local and global paleoredox the late Cambrian–Early Ordovician from two drill core successions Baltoscandia. Local proxies...