Johanna Lomax

Johanna Lomax
Justus-Liebig-Universität Gießen | JLU · Department of Geography

About

68
Publications
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1,100
Citations
Citations since 2017
31 Research Items
683 Citations
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120

Publications

Publications (68)
Article
Full-text available
The Marine Isotope Stage (MIS) 2 is considered the coldest, driest and stormiest period during the last Glacial-Interglacial cycle in large parts of Eurasia. This resulted from strongly decreased northern hemisphere temperature and related maximum extension of northern ice sheets that strongly reinforced large-scale circulation modes such as wester...
Article
Loess palaeosol sections (LPS) in northern Armenia exhibit at least three alternating loess and pedocomplex units, indicative of an environment changing between erosional/depositional and stable conditions. The LPS they are located in a central key position between loess in Europe, central Asia and the Russian/Ukrainian Plains. Since an accurate ch...
Article
Full-text available
The μDose system is a recently developed analytical instrument applying a combined α- and β-sensitive scintillation technique for determining the radioactivity arising from the decay chains of 235U, 238U and 232Th as well as from the decay of 40K. The device was designed to meet the particular requirements of trapped charge dating methods and allow...
Article
Full-text available
The loess-palaeosol section Achajur is part of the Sevkar loess area in north-eastern Armenia and comprises three prominent pedocomplexes with intercalated loess units, probably spanning at least three glacial-interglacial cycles. With its central position between the Black Sea and the Caspian Sea, the Sevkar loess area serves as important bridge b...
Article
Full-text available
This paper aims to reconstruct Middle Bronze Age (MBA; 1600-1250 BCE) land use practices in the northwestern Alpine foreland (SW Germany, Hegau). We used a multi-proxy approach including the analysis of biogeochemical proxies from colluvial deposits and buried topsoils in the surroundings of the well-documented settlement site of Anselfingen and of...
Preprint
Full-text available
The µDose-system is a recently developed analytical instrument applying a combined α- and β-sensitive scintillation technique for determining the radioactivity arising from the decay chains of 235U, 238U and 232Th as well as from the decay of 40K. The device was designed to meet the particular requirements of trapped charge dating methods and allow...
Preprint
Full-text available
This paper aims to reconstruct Middle Bronze Age (MBA) land use practices in the north-western Alpine foreland (SW Germany, Hegau). We used a multi-proxy approach including the biogeochemical proxies from colluvial deposits in the surrounding of the well-documented settlement site of Anselfingen and offsite pollen data from two peat bogs. This appr...
Article
Full-text available
Colluvial deposits are considered as sedimentary archives for the reconstruction of the sedimentation and climate history, past pedogenesis and phases of land use. However, the human contribution to the formation of colluvial deposits is mainly based on assumptions derived from the local chronostratigraphy and archaeology. For this reason, there is...
Article
Full-text available
The global character of the millennial-scale climate variability associated with the Dansgaard–Oeschger (DO) events in Greenland has been well-established for the last glacial cycle. Mainly due to the sparsity of reliable data, however, the spatial coherence of corresponding variability during the penultimate cycle is less clear. New investigations...
Article
The μDose system was developed to allow the measurement of environmental levels of natural radioactive isotopes. The system records α and β particles along with four decay pairs arising from successive decays of ²¹⁴Bi/²¹⁴Po, ²²⁰Rn/²¹⁶Po, ²¹²Bi/²¹²Po and ²¹⁹Rn/²¹⁵Po. Under the assumption of secular equilibrium, this allows assessing the specific rad...
Preprint
Full-text available
The global character of the millennial-scale climate variability associated with the Dansgaard-Oeschger (DO) events in Greenland has been well-established for the last glacial cycle. Mainly due to the sparsity of reliable data, however, the spatial coherence of corresponding variability during the penultimate cycle is less clear. New investigations...
Article
While numerous high-resolution studies concerning Last Glacial aeolian sequences are available for Europe, the approach of the penultimate glacial in this geographical area is still poorly developed. In order to bridge this gap, this study focuses on the Bulgarian sequence of Harletz, along the Danube River, where extremely high sedimentation rates...
Article
The Harletz loess‐palaeosol sequence is located in northwestern Bulgaria and represents an important link between well‐studied loess sequences in eastern Romania and further sites to the west of the Carpathians (e.g. Serbia and Hungary). The aim of this study was to establish a chronostratigraphy of the deposits, using various methods of luminescen...
Preprint
The $\mu$Dose system was developed to allow the measurement of environmental levels of natural radioactive isotopes. The system records $\alpha$ and $\beta$ particles along with four decay pairs arising from subsequent decays of $^{214}$Bi/$^{214}$Po, $^{220}$Rn/$^{216}$Po, $^{212}$Bi/$^{212}$Po and $^{219}$Rn/$^{215}$Po. Under the assumption of se...
Article
Full-text available
Our 1-day field trip will first lead us to an area south of Mar- burg in the middle reach of the Lahn valley. After an intro- duction to the natural settings of the area, we will visit the gravel quarry of Niederweimar, one of the largest of its kind in Hesse. The gravel quarry exposes three units of gravel which possibly represent the remains of d...
Article
Full-text available
In antiquity, the development of techniques to collect and store water was fundamental to sustain life in arid regions. One way to overcome the problem of water supply in the desert was to construct water reservoirs and cisterns which collect surface runoff during rare rain events. Indeed, open reservoirs and rock‐cut cisterns are widely spread ove...
Article
Full-text available
Stone pavements are typical landforms in arid environments, composed of a monolayer of clasts at the surface, associated with an underlying unit of eolian fines. They represent important paleoenvironmental sediment archives, for which reliable chronostratigraphic age constraints are needed. In a first study on stone pavements from the Mojave Desert...
Article
Full-text available
Intraplate regions characterized by low rates of seismicity are challenging for seismic hazard assessment, mainly for two reasons. Firstly, evaluation of historic earthquake catalogues may not reveal all active faults that contribute to regional seismic hazard. Secondly, slip rate determination is limited by sparse geomorphic preservation of slowly...
Article
Local to regional paleoenvironmental reactions to past climate changes are preserved in loess-paleosol sequences (LPS). In order to extract this information we used a multi-methodological approach in the Upper Paleolithic site of Krems-Wachtberg East in Lower Austria. Detailed field studies and high-resolution geochemical, colorimetric, and granulo...
Article
Tectonic basins can represent valuable archives of the environmental history. Presented here are the stratigraphy and multi-proxy analyses of two adjacent alluvial fans in the Quaternary active parts of the Vienna Basin, situated at the interface of the Atlantic, European continental and Mediterranean climate. Deposits comprise a sequence of coarse...
Article
Full-text available
The transition zone between Eastern Alps and Pannonian Basin is a key area for the investigation of the interplay between regional uplift, local tectonic subsidence and depositional environment. Our study area, the western margin of the Little Hungarian Plain, is characterized by gentle hills, plateaus and depressions, of which several are filled b...
Article
Full-text available
Including faults into seismic hazard assessment depends strongly on their level of seismic activity. Intraplate regions are characterized by low seismicity, so that the evaluation of existing earthquake catalogues does not necessarily reveal all active faults that contribute to seismic hazard. In the Vienna Basin (Austria), moderate historical seis...
Article
Archaeological surveys of the Negev Highlands show that the settlement history of this arid environment oscillated widely over time. This observation is almost entirely based on scant sherd assemblages from surveys, with only a few chronometric ages from one or two archaeological features at a given site. The reasons for the scarcity of chronometri...
Article
In the central Vienna Basin, the area north of the River Danube is dominated by large river terraces consisting mainly of coarse sandy gravels and sand deposited by the Danube and the Morava River. IRSL dating for the terrace body yielded minimum ages from about 200 to 300 ka. The terrace deposits are locally covered with loess and aeolian sand of...
Article
Full-text available
Optically stimulated luminescence (OSL) dating is widely applied to sediments in paleoenvironmental sciences. However, there are only limited examples determining the age of archaeological stone structures by OSL using dust deposits. The age of dust deposits associated with ancient buildings may be used to date the onset of settlement (sediment bel...
Article
Full-text available
Hochterrassen (High or Higher Terraces) are a prominent geomorphological feature of the Northern Alpine Foreland and have traditionally been attributed to the Rissian glaciation. However, distinct morphological sublevels observed for this feature have often raised the question of their age. This issue is exemplarily investigated here on the Langwei...
Article
Full-text available
Only minimal age constraints are as yet available concerning the timing of the penultimate glaciation in the European Alps. Therefore, this study presents the results of different luminescence dating approaches, revealing the depositional ages of glaciofluvial sediments deposited in the Austrian Northern Alpine Foreland during the penultimate glaci...
Article
Desert pavements are widespread landforms of arid environments. They consist of a monolayer of clasts at the surface, associated with an underlying unit of eolian fines. In some situations, buried desert pavements can be observed, which is interpreted as a change in the environmental conditions. Therefore, it is believed that desert pavements repre...
Article
Full-text available
Reconstructing the evolution of arid landscapes is challenged by limited availability of appropriate environmental archives. A widespread surface feature - stone pavement - traps aeolian fines and forms a special accretionary archive. Seven stone pavement-covered sections on basalt flows in the eastern Mojave Desert are condensed into a composite s...
Article
Full-text available
During the penultimate glaciation vast areas of the Alps were glaciated, with piedmont glaciers protruding into the foreland. In the easternmost part of the northward draining valleys of the Alps, the glaciers did not reach the foreland, but formed valley glaciers confined by the mountainous terrain. This also applies to the Ybbs valley, where samp...
Article
This study presents test measurements on a Lexsyg luminescence reader, acquired by the Giessen luminescence group. The reader is of the type Standard, hence designed for routine determination of palaeodoses using quartz or K-feldspars. The tests include measurements of the stimulation powers, preheat temperatures, OSL- and TL-curves, as well as dos...
Article
Full-text available
Alluvial and colluvial sequences were studied around the prehistoric tell Arslantepe in 11 exposures and additional auger cores. The chronology is based on 11 optically stimulated luminescence (OSL) ages, four radiocarbon ages, and the embedded artifacts. Sediments contained wood charcoals, providing information on former vegetation. Fluvial activi...
Article
The amount of glacial advances into the alpine foreland during the Pleistocene is still a matter of discussion. The big four glaciations of the classical approach were originally derived from outwash sequences. From glacial basins, only very few long records and studies are known. In the context of a geological mapping programme of the Bavarian Env...
Article
Full-text available
This study investigates the potential of luminescence to date deposits from different fluvial sedimentary environments; namely point bar deposits, sandy and silty channel fills and floodplain sediments. Samples were taken from Holocene (<5 ka) terraces of the Lech and Danube rivers, for which independent age constraint is available through 14C ages...
Article
Full-text available
The Australian region spans some 60° of latitude and 50° of longitude and displays considerable regional climate variability both today and during the Late Quaternary. A synthesis of marine and terrestrial climate records, combining findings from the Southern Ocean, temperate, tropical and arid zones, identifies a complex response of climate proxie...
Article
Using quartz for dating via the optically stimulated luminescence (OSL) method comprises various advantages compared to the infrared stimulated luminescence (IRSL) of feldspar. First of all the quartz OSL signal is not affected by anomalous fading. Secondly, bleaching of the signal by exposure to sunlight during transportation of the sediment is mo...
Conference Paper
Full-text available
The interaction and kinematic linkage of single faults within a fault system is an important issue for estimating the seismic potential of the fault system. Faults can be either linked directly by merging in greater depths or by lateral growth or indirectly by influencing each other by stress loading and unloading due to earthquakes. The Vienna Bas...
Article
In connection to an archaeological project in Bosnia and Herzegovina, charcoal fragments from several geomorphological profiles were analysed, due to the lack of other archives for palaeoenvironmental reconstruction. The major aim of the presented study was to systematically test the suitability of the documented colluvial and alluvial layers for c...
Article
The loess section Krems-Wachtberg (Lower Austria) is well known for its Upper Palaeolithic find layer, which contains a double and a single infant burial. The layer containing the grave (archaeological horizon AH 4.4) was dated to 26,580 ± 160 14C BP (Einwögerer et al., 2006), corresponding to ca. 31 ka cal BP and is embedded in an 8 m thick loess...
Article
We studied Quaternary sediments from the Budějovice basin in southern Bohemia, now being able to reconstruct the landscape formation of this area during the late Pleistocene. The main objective of this study was to map fluvial terraces of the rivers Vltava and Malše in the basin and to constrain their ages by luminescence dating. Topographic data f...
Article
The Northern Alpine Foreland has played a major role in the investigation of glacial and furthermore paleo-climatic events. It was at the beginning of the 20th century, when Albrecht Penck developed the idea of four big alpine glaciations which extended into the alpine foreland. He developed the model of the glacial series in which he correlated te...
Conference Paper
Full-text available
The Vienna Basin strike-slip fault is a continent scale active fault extending over a distance of some 300 km from the Eastern Alps through the Vienna Basin into the Western Carpathians. Sinistral movement causes the formation of several tight Pleistocene strike-slip basins within the older Miocene Vienna Basin. These sub-basins not only have a hig...
Article
Full-text available
Research questions, strategy, potentials, and first results of geoarchaeological investigations at Arslantepe are presented. The work is focused on the history of soils, relief, soil erosion, river acti- vity, and forest composition. The data are acquired from slope and alluvial sediments and buried soils as palaeoenvironmental archives. First resu...
Article
Full-text available
Gegenstand dieser Studie ist die würm-spätglaziale und holozäne Talentwicklung am Zusammenfluss von Lech und Donau im Nördlichen Alpenvorland. Die morphologischen Formen im Untersuchungsgebiet wurden mit Hilfe von Geländekartierungen und digitalen Geländemodellen aufgenommen. Die Ablagerungen beider Flüsse wurden in zahlreichen Aufschlüssen untersu...
Article
This study is concerned with the reconstruction of the palaeoenvironmental history of southeastern Australia for the last ∼300 ka by establishing a luminescence chronology of dune sand deposition in the western Murray Basin (South Australia). In the study area, vast fields of palaeodunes, stabilised by vegetation, provide evidence of past environme...
Conference Paper
Full-text available
The Vienna Pull-Apart Basin between the Alps and the Carpathians is characterized by moderate seismicity focused along the NNE-SSW striking left-lateral strike-slip Vienna Basin Transfer Fault (VBTF) that delimits the basin towards the east. Displacement rates determined from GPS geodesy and geological markers range between 1.5 - 2.0 mm/a. However,...
Article
Full-text available
The European Alps were largely covered by ice during full glacial conditions of the Pleistocene. Nevertheless, large parts of the southwestern and eastern Alps remained unglaciated or covered only by small valley glaciers during glacials. The impact of a climatic decline of such a dimension on fluvially dominated catchments is not clear so far. Lak...
Article
The Budějovice Basin in the Bohemian Massif (Czech Republic) is a fault-bounded sedimentary basin with a multiple subsidence history overlying Variscan crystalline basement. Permian, Cretaceous and Miocene sediments record repeated reactivations of faults at or close to the basin margin, which may have continued into the Quaternary. The latter is i...
Article
Arid and semi-arid areas are lacking in fossils for the reconstruction of the Quaternary climate. Therefore, sediments from ephemeral rivers are a welcome climatic archive in Namibia. Restrictions concerning the palaeoclimatic evidence lie in the fact that the sediments examined usually reflect the climate of the upper reaches of the rivers rather...
Article
Experimental results from ESR dose recovery tests using Ti-related absorption lines in sedimentary quartz will be presented and discussed. The tests were performed on two Late Pleistocene Australian dune sands with a known burial dose based on OSL measurements. The regenerative dose technique (after thermal annealing) was used to detect any differe...
Article
Preliminary results of an optically stimulated luminescence dating study in the western Murray Basin in semi-arid south-eastern Australia are presented. The ultimate objective of the dating study is a reconstruction of dune formation indicative of palaeoclimatic changes in this region. So far, one site has been dated using the single-aliquot regene...
Conference Paper
Full-text available
Although research on the glaciations in northeast Germany already began in the late 19th century the Late Weichselian ice advances are still relatively poorly dated. The chronology is based on radiocarbon ages. But as these rely on organic material, the actual relation to the ice advance is often not clear. Furthermore, calibration of these ages is...
Article
Ti-related paramagnetic centres in quartz are promising dosimeters to estimate burial ages of sedimentary deposits with electron spin resonance (ESR). In general, two different subspecies can be found, known as Ti–Li and Ti–H centres. Recent single- and multiple-grain ESR dating experiments have shown that apparent burial doses determined from thes...
Article
In the upper Hoanib River catchment area, northwestern Namibia, fine-grained silty deposits are widespread. Accumulated as river-end deposits they form excellent geomorphological archives of a highly sensitive desert-margin area. Different sedimentary complexes are separated sedimentologically and by luminescence dating. The deposits give evidence...
Article
This study is concerned with the Late Quaternary climatic chronology of the Strzelecki Desert dunefields in central Australia. The sand ridges comprise layers of quartz sand, some of which include palaeosol horizons with carbonated rootlets providing excellent opportunity for dating of alternations of dune building and stability by using optically...

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Projects (3)
Project
Co-directed by Prof. Israel Finkelstein and Prof. Ruth Shahack-Gross, this long-term project aims to study the settlement oscillations in the Negev Highlands over the last 5000 years. Using high-resolution microarchaeological and absolute dating methods, the project focuses on investigating subsistence practices and the detailed chronology of human habitation in the arid landscape.