Christian Rolf

Christian Rolf
Leibniz Institute for Applied Geophysics | LIAG · Rock Physics & Borehole Geophysics; (S5)

PhD
Retired since the first of October 2021

About

147
Publications
22,644
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1,491
Citations
Citations since 2016
48 Research Items
919 Citations
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200
2016201720182019202020212022050100150200
Additional affiliations
June 1988 - present
Leibniz Institute for Applied Geophysics
Position
  • Senior Researcher

Publications

Publications (147)
Article
Loess Paleosol Sequences (LPS) are valuable archives of climatic and environmental change in terrestrial systems and contribute to local and global dust systems. Due to their widespread occurrence across continents, LPS are well suited to study the interface of climate subsystems, on different time scales. Yet, high-resolution investigations of LPS...
Article
Full-text available
Because continuous and high-resolution records are scarce in the polar Urals, a multiproxy study was carried out on a 54 m long sediment succession (Co1321) from Lake Bolshoye Shchuchye. The sedimentological, geochemical, pollen and chironomid data suggest that glaciers occupied the lake's catchment during the cold and dry MIS 2 and document a chan...
Conference Paper
Full-text available
Loess deposits of northern and northeastern Iran provide excellent sedimentary archives for understanding past climate and environment changes in the continental interior. The loess records paleoenvironmental change in Iran over multiple glacial cycles, and helps to assess the extent to which key features of loess stratigraphy can be traced along t...
Conference Paper
Full-text available
Loess-paleosol sequences (LPSs) are aeolian terrestrial paleoclimate archives able to conserve several hundreds of thousands years of climate history. Loess deposits cover at least 10 % of the northern hemisphere continental masses (Pécsi, 1990) and provide adequate properties to conserve climate changes imprinted in the stratigraphically analyzabl...
Article
A high-resolution analysis of the Zmajevac loess-palaeosol sequence in East Croatia (Baranja) was performed with the purpose to get new insights into the palaeoenvironmental history during the last three glacial-interglacial cycles. The post-IR infrared stimulated luminescence signal of feldspar, stimulated at 290°C (thereafter pIRIR290) was used t...
Article
Full-text available
Plain Language Summary Levinson‐Lessing Lake in northern Central Siberia is a sedimentary archive characterized by continuous, widely constant sedimentation at high rates (0.7 m ka⁻¹ for >32 ka). Because lakes with such long‐term constant properties are extremely rare throughout the Arctic Circle, the 46‐m‐long sediment core Co1401 recovered in 201...
Data
In 2017 the 46 m long sediment core Co1401 was retrieved in the frame of the Project PLOT (Paleolimnological Transect) from Levinson-Lessing Lake in northern Central Siberia (74°27'53.64"N, 98°39'58.03"E). Whole-core measurements include the magnetic susceptibility, natural remanent magnetization (NRM), and the residual NRM after 5 mT, 10 mT, and 1...
Article
The southern Caspian Lowland sensitively reacted to Pleistocene climate change and is a key area for reconstructing climate dynamics and landscape evolution in Southern Eurasia. Loess-paleosol sequences (LPS) of the northern foothills of Alborz Mountains provide detailed records of climate-induced changes of dust accumulation and soil formation cor...
Article
In the Golestan province in northern Iran extensive loess deposits, and widespread loess-derived soils crop out. While a strong precipitation gradient (200–700 mm per year) from North to South is characteristic, temperature differences are negligible (17–18 °C per year). Recently, many studies on loess-derived palaeosols and modern soils from this...
Article
The Stuttgart Formation (traditionally called the Schilfsandstein) in the Germanic Basin (or Central European Basin) is a sand-rich episode representing the Mid-Carnian Episode within the gypsum-rich clayey semi-arid Keuper facies. That regional Mid-Carnian Episode is now recognized to be a manifestation of a significant global disruption of Earth'...
Article
Full-text available
Magnetic field maps display distinct anomalies for NE Bavaria. In this study we test several rock types, such as volcanic intercalations in paleozoic rock units, metamorphic rocks of the Münchberg Massif and granites of the Fichtelgebirge for their possible contribution to the magnetic anomalies. In some of the volcanic rocks (diabase, pillow lavas...
Article
Full-text available
We present the findings from analysis and modeling of a stratigraphic series of magnetic susceptibility (MS) data measured with a portable MS meter from the Permian Salagou Formation loessite (south-central France). The results reveal discernible Milankovitch-scale paleoclimatic variability throughout the Salagou Formation, recording astronomically...
Poster
Full-text available
Cylcostratigraphy is used to investigate quasi-cyclic patterns in sediments. It often provides insight about time and climate. While most studies utilize proxies related to precipitation and temperature, reconstruction of wind and flow directions is more challenging. The grain size of aeolian sediments can give insight into the transport distance o...
Article
The entrance of Earth's climate into the present icehouse state during a time of rapid temperature decline in the late Pliocene was intensively investigated during the past decade. Even though it is well documented in marine archives, a detailed reconstruction of the Pliocene-Pleistocene climatic evolution of Central Europe is hampered by a general...
Article
Full-text available
Millennial-scale palaeoclimate variability has been documented in various terrestrial and marine palaeoclimate proxy records throughout the Northern Hemisphere for the last glacial cycle. Its clear expression and rapid shifts between different states of climate (Greenland Interstadials and Stadials) represents a correlation tool beyond the resoluti...
Conference Paper
Full-text available
Loess palaeosol sequences (LPSs), widely spread over the northern hemisphere and especially Eurasia, are valuable records for various palaeoenvironmental parameters. Here, a LPS from northern Iran (Agh Band) was analysed in terms of rock-and palaeomagnetic proxies. The study site is located in the so-called Iranian loess plateau with an average ann...
Article
The Atacama Desert in northern Chile is one of the driest deserts on Earth. Hyperaridity persists at least since the Miocene and was punctuated by pluvial phases. However, very little is known about the timing, regional spread and intensities of precipitation changes. Here, we present a new precipitation record from a sedimentary sequence recovered...
Article
S U M M A R Y Archaeomagnetic directions of 141 archaeological structures have been studied from 21 sites in Austria, 31 sites in Germany and one site in Switzerland. Characteristic remanent magne-tization directions obtained from alternating field and thermal demagnetizations provided 82 and 78 new or updated (12 and 10 per cent) directions of Aus...
Article
Here we present the first tephrostratigraphic, palaeomagnetic, and multiproxy data from a new ~98 m-deep sediment core retrieved from the Fucino Basin, central Italy, spanning the last ~430 kyr. Palae-oenvironmental proxy data (Ca-XRF, gamma ray and magnetic susceptibility) show a cyclical variability related to interglacial-glacial cycles since th...
Poster
Full-text available
Central European loess-palaeosol sequences (LPS) are valuable recorders of Late Pleistocene climatic change Bialy Kościół (BK) section is located in Lower Silesia c. 130 km. of the last glacial maximum ice extent. BK LPS is considered to be one of the most complete LPS in SW-Poland covering the last glacial cycle (LGC). Recording since latest Pleis...
Data
The entrance of Earth's climate into the present icehouse state during a time of rapid temperature decline in the late Pliocene was intensively investigated during the past decade. Even though it is well documented in marine archives, detailed reconstruction of the Pliocene-Pleistocene climatic evolution of central Europe is hampered by a general l...
Article
Full-text available
Paleoclimate records from the Atacama Desert are rare and mostly discontinuous, mainly recording runoff from the Precordillera to the east, rather than local precipitation. Until now, paleoclimate records have not been reported from the hyperarid core of the Atacama Desert (<2 mm/yr). Here we report the results from multi-disciplinary investigation...
Article
Measurements of the magnetic field are one of the most used methods in geophysical exploration. In order to reduce the degree of ambiguity of this technique during inversion and modelling, data acquired by newly available gradiometer systems based on Superconducting Quantum Interference Devices (SQUIDs) are used. These systems provide measurements...
Article
Red palaeosol (RP) covering the carbonate basement exposed at the bottom of the loess section and lithified terra rossa-like materials situated in cavities (LTR1) and karstified fissures (LTR2) in Cretaceous limestones were investigated by means of high-resolution approach, to give a systematic and deeper palaeopedological insight into reddish mate...
Article
Loess and loess-like deposits with intercalated palaeosols are widely distributed in Croatia, particularly in the Pannonian basin in the east and along the Adriatic Coast in the west, which have provided invaluable evidences of Quaternary climate change. The timing, provenance and spatial distribution of such loess deposits have long been a major r...
Article
This study provides a detailed geochemical record of one of the best studied loess-paleosol sequences (LPS) in Hungary covering Marine Isotope Stage (MIS) 6 to MIS 2. Süttő is situated in the northwestern Carpathian Basin at the transition between oceanic and continental climate. We investigated weathering intensity, dust provenance and sedimentati...
Conference Paper
Full-text available
The sedimentary succession deposited in Fucino palaeo-lake potentially records the environmental history of the Central Mediterranean Region continuously since the early Pleistocene and up to recent historical times. Fucino palaeo-lake sediments are interbedded with numerous volcanic ash layers which allow the reconstruction a robust and independen...
Poster
Full-text available
The poster outline the analytical procedures that are applied to unravel the multi-component magnetic mineralogy of the fluvial dominated sedimentary sequences of the Heidelberg Basin.
Article
The correlation of loess sequences across global, hemispheric, regional and local scales is one of the most fundamental aspects to loess research. However, despite recent progress in stratigraphic and chronometric methods, the correlation of many loess sequences is often still based on untested assumptions over loess deposition, preservation, soil...
Article
Full-text available
The sedimentary succession deposited in Fucino palaeo-lake potentially records the environmental history of the Central Mediterranean Region continuously since the early Pleistocene and up to recent historical times. Fucino palaeo-lake sediments are interbedded with numerous volcanic ash layers which allow the reconstruction a robust and independen...
Article
In southern Eurasia recurrent phases of aridization, dust source extension and enhanced Aeolian sedimentation alternated with moister intervals, promoting reduced deflation areas and dust accumulation in the context of late Pleistocene climate changes. Weathering and soil forming intensity in this greater region are, hence, mainly governed by fluct...
Article
The loess-palaeosol record on the island of Susak in Croatia is a unique archive of Late Glacial climate changes in the Adriatic region, possibly even in the wider area. On Susak up to 90 m of thick Quaternary sediments were deposited, and are accessible for detailed palaeoclimate reconstructions. In this paper, the results of a high-resolution gra...
Poster
Full-text available
Deep drillings in the Heidelberg Basin provide access to one of the thickest and most complete successions of Quaternary and Upper Pliocene continental sediments in Central-Europe. Although unconsolidated fluvial sediments are a fundamental challenge for palaeo- and rock magnetic approaches, long sequences from three sites (Heidelberg, Ludwigshafen...
Article
The Heidelberg Basin (Germany) hosts a quasi-continuous sedimentary sequence of primarily fluvial sediments with pedogenetic overprints and lacustrine intercalations. This unconsolidated succession has been shown to record a consistent magnetic polarity stratigraphy of the Quaternary and the late Neogene. Previous work has reported that sulphides a...
Article
A multi-proxy study, including palaeoecological, lithological, geochemical and geochronological methods, has been carried out on the Garding-2 research drill core in the German North Sea coastal area at Garding, in Schleswig-Holstein to investigate the palaeoenvironmental and palaeoclimatic evolution and the Quaternary stratigraphy for a broader co...
Article
Seafloor massive sulphide (SMS) deposits, found at water depths to 3600 m, are products of high-temperature hydrothermal activity associated with seafloor volcanism. Dissolved metals in the hydrothermal fluids precipitate when the fluids are expelled. Metal sulphides also accumulate as chimney-like structures. SMS are considered for future commerci...
Article
Full-text available
Aeromagnetic data from reconnaissance surveys are routinely used for geological mapping and modelling, although high-resolution aeromagnetic data are only rarely acquired. In this study, with investigation areas located in NW Germany, two datasets of different resolution are analysed in comparison. The first dataset was acquired in the 1960s at 700...
Article
The Northern Iranian loess profiles host important information on Quaternary climate and palaeoenvironmental changes in the region. They build an important link between the Eurasian loess belt and European and Central Asian archives. Due to a climatic gradient with decreasing precipitation from the west to the east and from the south to the north,...
Conference Paper
Full-text available
XRF analysis of a loess-palaeosoil sequence: A new approach to decipher Pleistocene climatic and environmental variations applied to Rodderberg, Germany Bernd Zolitschka, a*, Christian Rolf, b, Felix Bittmann, c, Franz Binot, b, Manfred Frechen, b, Thomas Wonik, b, Nikolaus Froitzheim, d & Christian Ohlendorf, a a Geomorphology and Polar Research...
Conference Paper
Full-text available
The cracks in Senonian limestones on the island of Susak are filled by red clayey materials (terra rossa) which we consider remain of the oldest paleosol(s) on the island. The same limestone is covered by loess-paleoosol sequence up to 90 m thick. The lowermost red paleosol in this sequence covers the carbonate bedrock. From the mineralogical and g...
Poster
Full-text available
Das Heidelberger Becken ist die bedeutendste Sedimentfalle des Oberrheingrabens. Im Rahmen eines DFG finanzierten Projektes (RO2170/8-1 & HA2193/10-1) wurden Bohrungen aus dem Raum Viernheim (350 m), Ludwigshafen (300 m) und Heidelberg (500 m) mit den Mitteln der Gesteinsmagnetik untersucht. Die Bearbeitung der quasi-kontinuierlichen Sedimentabfolg...
Conference Paper
Full-text available
The loess-palaeosol record from the island of Susak provides an excellent archive of palaeoenvironmental changes of the Northern Adriatic area. More than 30 m thick loess deposits which cover the Cretaceous carbonate basement have been the matter of interest for scientists for a long time. The loess on Susak is intercalated by numerous palaeosols,...
Article
The Transantarctic mountains predominantly consist of Jurassic continental flood basalts (Kirkpatrick) and sills (Ferrar) emplaced during the earliest phase of the break-up of Pangea. Published ages, based on a variety of geochronological methods all agree rather well and cluster around 180 Ma suggesting emplacement during a rather short time inter...
Article
This work presents the results of a magnetostratigraphic survey performed on 1,150 m of core material from three sites within the Heidelberg Basin. The cores intersect one of the thickest continuous accumulations of Plio-Pleistocene fluvial sediments in western Central Europe. The resultant magnetic polarity stratigraphy includes every Quaternary p...
Data
This work presents the results of a magnetostratigraphic survey performed on 1150 m of core material from three sites within the Heidelberg Basin. The cores intersect one of the thickest continuous accumulations of Plio-Pleistocene fluvial sediments in western Central Europe. The resultant magnetic polarity stratigraphy includes every Quaternary pol...
Conference Paper
Full-text available
Dating of loess palaeosol sequences by magnetic methods Rolf, C.1*. & Hambach, U.2 1Leibniz Institute for Applied Geophysics (LIAG Hannover); 2University of Bayreuth, BayCEER and Chair of Geomorphology Abstract The well known polarity history of the Earth’s Magnetic Field (EMF; originally based on marine magnetic anomalies) has been recorded in a b...
Conference Paper
Full-text available
The loess deposits on the foothills of the Alborz Mountains are excellent climate archives and provide detailed information about Quaternary environmental changes in the region. To better understand the timing of loess deposition, reworking as well as soil development, a chronological framework is mandatory. Only by providing resilient age estimate...
Conference Paper
Full-text available
Magnetostratigraphic investigations of long fluvial successions are generally under-represented compared to studies of marine, lacustrine or aeolian sediments. This can be explained by the scarcity of appropriate outcrops and the complexity and in-completeness of the recorded magnetic polarity signal. The Heidelberg Basin located in the northern Up...
Article
Full-text available
Crater sediments from the Rodderberg Volcanic Complex (East Eifel, Germany) provide a climate and environmental record spanning several glacial-to-interglacial cycles. We document and describe the lithology and demonstrate that the composition of this sediment record can be interpreted with regard to environmental variations as well as to changes i...
Conference Paper
Full-text available
Deep drillings in the Heidelberg Basins provide access to one of the thickest and most complete successions of Quaternary and Upper Pliocene continental sediments in Central-Europe [1]. In absence of any comprehensive chronostratigraphic model, these sediments are so far classified by lithological and hydrogeological criteria. Therefore the age of...
Article
Basaltic lava flows of Malwa plateau together with the Mandla area and the Toranmal section constitute the Northern Deccan Province in central western India. With the present outcrop area of 80,000 km2 the Malwa flows form an extensive but relatively thin sequence. We sampled Deccan basalts along two 100 km each N-S and E-W transects along the wes...
Conference Paper
Full-text available
Fluvial sediments are a fundamental challenge for the application of magnetic polarity stratigraphy. The low content of magnetisable minerals and various synsedimentary and post depositional processes limit the chance for confidential results. Here, we present a case study from the Heidelberg Basin, where one of the thickest and most complete succe...
Article
A thorough rock- and palaeomagnetic investigation of an almost 13-m-thick Upper Pleistocene loess–palaeosol sequence (LPSS) outcropping near the village of Süttő in northern Hungary was conducted to obtain rock magnetic and palaeomagnetic-based chronostratigraphies. The results of our rock magnetic investigations indicate that the classical “Chines...
Article
Full-text available
One of the most prominent applications of anisotropy of magnetic susceptibility (AMS) measurements is the evaluation of flow fabrics in basalts. Basalts often contain Fe–Ti oxides with variations in grain/domain size fractions due to their variable cooling history. The origin of AMS in such rock types is of complex nature. Crystal shape, magnetocry...
Conference Paper
The Transantarctic Mountains predominantly consist of Jurrasic continental flood basalts (Kirkpatrick) and sills (Ferrar) emplaced during the early phase of the break-up of Pangea. Published ages, based on a variety of geochronological methods all agree rather well and cluster around 183 Ma suggesting an emplacement interval of less than 1ma. Paleo...
Article
The Arternian Interglacial has been established on the basis of a pollen record within the Muschelton (= Shell Clay) horizon near Voigtstedt (type locality) in the surroundings of Artern in Central Germany. This horizon is older than the early Middle Pleistocene Voigstedt/Lehmzone (= Loam Zone) layers, which overlie the Muschelton. Due to the lack...
Article
One of the most prominent applications of anisotropy of magnetic susceptibility (AMS) measurements is the evaluation of flow fabrics in basalts. Basalts often contain Fe-Ti oxides with variations in grain/domain size fractions due to their variable cooling history. The origin of AMS in such rock types is of complex nature. Crystal shape, magneto-cr...
Article
Full-text available
Purpose Electromagnetic induction based metal detectors are commonly used in landmine clearance operations. Their performance can be seriously deteriorated by magnetic properties of the soil in which the landmines are buried. Materials and methods Soil magnetic parameters were studied at three locations in Southern Mozambique where soils had cause...
Conference Paper
Full-text available
Introduction Loess particle size variations frequently serve as proxy for past Aeolian dynamics (e.g. Machalett et al. 2008, Sun et al. 2004). On the other hand its magnetic properties may reflect syndepo-sitional alteration resulting from changes in chemical weathering intensity as a consequence of long-term fluctuations in palaeo-precipitation (E...
Article
Fluvial sediments especially from large streams with almost continentwide catchments reflect sensitively the response of continental ecosystems to climate change. During the late Plio-/ Pleistocene several hundred meter of fluvial clastics have been accumulated in the vicinity of Heidelberg (northern Upper Rhine Graben). The Heidelberg Basin was fe...
Poster
Full-text available
Since the late Pliocene / Early Pleistocene the Heidelberg Basin has acted as a trap for sediments from local to superregional delivery areas. These sediments are transported by the rivers Rhine and Neckar. The on-going subsidence has led to one of the thickest, most complete successions of Quaternary sediments in Mid-Europe (Gabriel et al. 2008)....