A5020407377- Geology and Paleoclimatology Research
- Paleontology and Stratigraphy of Fossils
- Isotope Analysis in Ecology
- Geological and Geophysical Studies
- Methane Hydrates and Related Phenomena
- Geological formations and processes
- Hydrocarbon exploration and reservoir analysis
- Marine Biology and Ecology Research
- Geochemistry and Elemental Analysis
- Geomagnetism and Paleomagnetism Studies
- Geological and Geochemical Analysis
- Geological Studies and Exploration
- Evolution and Paleontology Studies
- Astro and Planetary Science
- Paleontology and Evolutionary Biology
- earthquake and tectonic studies
- Geological and Tectonic Studies in Latin America
- Atmospheric and Environmental Gas Dynamics
- Fish biology, ecology, and behavior
- Maritime and Coastal Archaeology
- Nuclear Physics and Applications
- Hydraulic Fracturing and Reservoir Analysis
- Geological Modeling and Analysis
- Global Energy and Sustainability Research
- Marine and environmental studies
Universidade do Vale do Rio dos Sinos
2011-2024
Kiel University
2014-2022
The University of Tokyo
2022
Islamic Azad University, Shahrood
2015
Sari Agricultural Sciences and Natural Resources University
2015
National University of Rosario
2015
Petrobras (Brazil)
2013
Departamento Nacional de Produção Mineral
2013
Abstract The late Miocene offers the opportunity to assess sensitivity of Earth’s climate orbital forcing and changing boundary conditions, such as ice volume greenhouse gas concentrations, on a warmer-than-modern Earth. Here we investigate relationships between low- high-latitude variability in an extended succession from subtropical northwestern Pacific Ocean. Our high-resolution benthic isotope record combination with paired mixed layer Mg/Ca-derived temperature data reveal that long-term...
Research Article| February 01, 2015 Global perturbation of the carbon cycle at onset Miocene Climatic Optimum Ann Holbourn; Holbourn 1Institute Geosciences, Christian-Albrechts University, D-24118 Kiel, Germany Search for other works by this author on: GSW Google Scholar Wolfgang Kuhnt; Kuhnt Karlos G.D. Kochhann; Kochhann Nils Andersen; Andersen 2Leibniz Laboratory Radiometric Dating and Stable Isotope Research, K.J. Sebastian Meier Author Article Information Publisher: Geological Society...
Abstract The Miocene Climatic Optimum (MCO; ~16.9 to 14.7 Ma) provides an outstanding opportunity investigate climate‐carbon cycle dynamics during a geologically recent interval of global warmth. We present benthic stable oxygen ( δ 18 O) and carbon 13 C) isotope records (5–12 kyr time resolution) spanning the late early middle (18 at Integrated Ocean Drilling Program (IODP) Site U1335 (eastern equatorial Pacific Ocean). series track onset development MCO as well transitional climatic phase...
Abstract We integrate benthic foraminiferal stable isotopes, X‐ray fluorescence elemental ratios, and carbonate accumulation estimates in a continuous sedimentary archive recovered at International Ocean Discovery Program Site U1443 (Ninetyeast Ridge, Indian Ocean) to reconstruct changes deposition climate evolution over the interval 13.5 8.2 million years ago. Declining percentages together with marked decrease rates after ~13.2 Ma signal onset of prolonged episode reduced deposition. This...
Abstract Fossils from the Araripe Basin (northeastern Brazil) are known for their remarkable preservation of vertebrates and invertebrates, even including soft tissues. They occur in carbonate concretions within organic carbon‐rich strata assigned to Romualdo Formation. Here we present integrated stable isotope, elemental microfossil records Sítio Sobradinho outcrop, Basin, northeastern Brazil. Our results imply that black shales hosting fossil‐bearing lower Formation were deposited during...
Abstract Tectonics and regional monsoon strength control weathering erosion regimes of the watersheds feeding into Bay Bengal, which are important contributors to global climate evolution via carbon cycle feedbacks. The detailed mechanisms controlling input terrigenous clay Bengal on tectonic orbital timescales are, however, not yet well understood. We produced orbital‐scale resolution geochemical records for International Ocean Discovery Program Site U1443 (southern Bengal) across five key...
This work presents a taxonomic study on the Late Maastrichtian radiolarian fauna from ODP Leg 165, Hole 999B, Colombian Basin. The studied is composed by 24 species, being family Archaeodictyomitridae Pessagno, 1976 most abundant and diverse. Original opaline skeletons are replaced calcium carbonate precise identifications possible only for those specimens with sturdy skeletons, what strongly suggests preservational bias. was attributed to Amphipyndax tylotus zone, due occurrence of that...
Research Article| October 01, 2013 APTIAN–ALBIAN PLANKTIC FORAMINIFERA FROM DSDP SITE 364 (OFFSHORE ANGOLA): BIOSTRATIGRAPHY, PALEOECOLOGY, AND PALEOCEANOGRAPHIC SIGNIFICANCE Karlos G. D. Kochhann; Kochhann 4 1ITT FOSSIL—Instituto Tecnológico de Micropaleontologia, Universidade do Vale Rio dos Sinos, Bloco 6K, Av. UNISINOS, 950, 93022-000, São Leopoldo, RS, Brazil 4Correspondence author. E-mail: kkochhann@unisinos.br Search for other works by this author on: GSW Google Scholar Eduardo A. M....
Abstract Orbital cycles are related to variations of Earth's orbit through time and exert profound control on glacial interglacial climates due changes in insolation. In this study, we aim test whether orbital millennial‐scale climate conditioned the deposition rhythmites southern Gondwana during Late Paleozoic Ice Age (LPIA). We present first cyclostratigraphic study based X‐ray fluorescence records from a 27‐m‐thick interval LPIA southeastern border Paraná Basin, Brazil. TiO 2 Fe O 3...
After the mass extinction at Cretaceous/Paleogene (K/Pg) boundary (~66 Ma), life forms quickly radiated to occupy ecological niches in world's oceans.Nevertheless, aftermath of Chicxulub impact, massive volcanism Deccan Traps and climatic perturbations endured during early Danian.The impact consequent carbon cycle on nascent plankton communities, such as Dan-C2 event (~65.80 ~65.71 is still poorly known.In this work, we present a detailed study planktic foraminiferal assemblages from Ocean...
The ODP, Site 1001B (Leg 165), located in the Caribbean Sea, presents a well preserved sedimentary succession ranging from Cretaceous to Neogene that consists predominantly of pelagic limestone.The main objective this article is study taxonomically Maastrichtian radiolarian and Maastrichtian-early Danian ostracode faunas recovered studied site compare them previously described elsewhere.Despite discontinuity occurrences scarcity specimens, 45 species seven assigned six genera, were...
Biostratigraphic results obtained with a systematic study of the planktic foraminiferal assemblages recovered from Upper Cretaceous-Lower Paleogene strata (Turonian?to early Danian in age) Deep Sea Drilling Program (DSDP) Site 356, São Paulo Plateau, are presented and discussed herein.Fifty-nine species were identifi ed within studied interval, enabling cation 11 zones age): Marginotruncana schneegansi, Dicarinella concavata, asymetrica, Globotruncanita elevata, Contusotruncana plummerae,...
This study presents the taxonomy of benthic foraminifera, ostracods, and radiolarians a sedimentary succession within Lachman Crags Member, Santa Marta Formation (upper Santonian-lower Campanian), northwestern James Ross Island.Twenty-seven foraminiferal species, six ostracod radiolarian species were identifi ed.Calcareous microfossils occurrences are restricted to few stratigraphic levels described as tuffaceous sandstones cemented by calcium carbonate, while siliceous agglutinated...