A5082368029- Geology and Paleoclimatology Research
- Paleontology and Stratigraphy of Fossils
- Methane Hydrates and Related Phenomena
- Geological and Geochemical Analysis
- Hydrocarbon exploration and reservoir analysis
- Ichthyology and Marine Biology
- Geochemistry and Geologic Mapping
- Geological formations and processes
- Marine and environmental studies
- Paleontology and Evolutionary Biology
- Evolution and Paleontology Studies
- Isotope Analysis in Ecology
- Atmospheric and Environmental Gas Dynamics
- Plant and animal studies
- Fish biology, ecology, and behavior
- Plant Diversity and Evolution
- Geological Studies and Exploration
- Geochemistry and Elemental Analysis
- Insect and Arachnid Ecology and Behavior
- Retinal Development and Disorders
- Mercury impact and mitigation studies
- Zoonotic diseases and public health
- Photoreceptor and optogenetics research
- Livestock and Poultry Management
- melanin and skin pigmentation
Museum Salling
2013-2025
Natural History Museum Aarhus
2005
Abstract. Large-scale magmatic events like the emplacement of North Atlantic Igneous Province (NAIP) are often coincident with periods extreme climate change such as Palaeocene–Eocene Thermal Maximum (PETM). One proxy for volcanism in geological record that is receiving increased attention use mercury (Hg) anomalies. Volcanic eruptions among dominant natural sources Hg to environment; thus, elevated Hg∕TOC values sedimentary rock may reflect an increase volcanic activity at time deposition....
Marine sedimentary ikaite is the parent mineral to glendonite, stellate pseudomorphs found throughout geological record which are most usually composed of calcite. Ikaite known be metastable at earth surface temperatures and pressures, readily breaking down more stable carbonate polymorphs when exposed warm (ambient) conditions. Yet process transformation calcite not well understood, there an ongoing debate as palaeoclimatic significance glendonites in record. This study uses a combination...
Abstract. There is a temporal correlation between the peak activity of North Atlantic Igneous Province (NAIP) and Paleocene–Eocene Thermal Maximum (PETM), suggesting that NAIP may have initiated and/or prolonged this extreme warming event. However, corroborating causal relationship hampered by scarcity expanded sedimentary records contain both climatic volcanic proxies. One locality hosting such record island Fur in Denmark, where an pre- to post-PETM succession containing hundreds ash...
Abstract The early Eocene (c. 56 - 48 million years ago) experienced some of the highest global temperatures in Earth’s history since Mesozoic, with no polar ice. Reports contradictory ice-rafted erratics and cold water glendonites higher latitudes have been largely dismissed due to ambiguity significance these purported cold-climate indicators. Here we apply clumped isotope paleothermometry a traditionally qualitative abiotic proxy, glendonite calcite, generate quantitative temperature...
Ikaite and pseudomorphs thereafter ("glendonites") are a potentially powerful tool for palaeoclimatic studies, as low-temperature proxy.However, much uncertainty still surrounds the drivers of ikaite formation, in particular prerequisite thermal chemical conditions.Furthermore, to glendonite transformation is not fully understood, it was unclear which calcite phases glendonites were ikaite-derived later diagenetic calcites.This leads difficulties choosing phase analyse order reconstruct...
This article reviews recent advances made by the authors through evaluation of samples in museum collections, context our novel observations, cleavage a recrystallising ikaite crystal, that may guide future research understanding morphology ikaite, which traditional crystallography has so far not achieved, as cannot be applied to ikaite. Having reviewed over 1100 using combination and petrology, we are able define how can classified glendonite. The topics covered include: (1) historical...
Abstract. The Paleocene–Eocene Thermal Maximum (PETM; ∼ 55.9 Ma) was a period of rapid and sustained global warming associated with significant carbon emissions. It coincided the North Atlantic opening emplacement Igneous Province (NAIP), suggesting possible causal relationship. Only very limited number PETM studies exist from Sea, despite its ideal position for tracking impact both changing climate NAIP activity. Here we present sedimentological, mineralogical, geochemical proxy data...
Petrography of recrystallised ikaite from Ocean Drilling Program material has been presented previously Nankai Trough and Congo (ex-Zaire) deep-sea fan. This paper expands on the observations, drawing evidence Laptev Sea, South Georgia, Okhotsk coastal lagoon Point Barrow. However, even though many glendonite sites occur at high latitudes, it cannot be that forms exclusively in polar environments, as demonstrated by occurrences low latitude temperature deep sea sediments offshore Gulf Guinea...
Abstract. Large-scale magmatic events like the emplacement of North Atlantic Igneous Province (NAIP) are often coincident with periods extreme climate change such as Palaeocene–Eocene Thermal Maximum (PETM). One proxy for volcanism in geological record that is receiving increased attention use mercury (Hg) anomalies. Volcanic eruptions among dominant natural sources Hg to environment; thus, elevated Hg/TOC values sedimentary rock may reflect an increase volcanic activity at time deposition....
Abstract. The Paleocene–Eocene Thermal Maximum (PETM; ~ 55.9 Ma) was a period of rapid and sustained global warming associated with significant carbon emissions. It coincided the North Atlantic opening emplacement Igneous Province (NAIP), suggesting possible causal relationship. Only very limited number PETM studies exist from Sea, despite its ideal position for tracking impact both changing climate NAIP explosive effusive activity. Here we present sedimentological, mineralogical,...
Marine sediments of the lowermost Eocene Stolleklint Clay and Fur Formation north-western Denmark have yielded abundant well-preserved insects. However, despite a long history research, in-depth information pertaining to preservational modes taphonomic pathways these exceptional animal fossils remains scarce. In this paper, we use combination scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM-EDX), transmission (TEM) time-of-flight secondary ion mass...
Abstract Marine deposits of earliest Eocene age in northern Jutland, Denmark, are renowned for yielding diverse teleost assemblages that have proved central enhancing our understanding the early evolution many extant actinopterygian clades. In this study, we investigate diminutive larval fish fossils from Stolleklint Clay, Ølst Formation, retain multiple soft‐tissue features preserved as distinct dark‐coloured stains. To examine elemental and molecular composition these soft parts, employed...