Ralph Thomas Becker

Ralph Thomas Becker
University of Münster | WWU · Institut für Geologie und Paläontologie

PhD

About

350
Publications
105,169
Reads
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5,107
Citations
Introduction
Devonian and Lower Carboniferous ammonoids Middle Palaeozoic mass extinctions and other global Events Devonian and Lower Carboniferous conodonts Devonian and Lower Carboniferous bio-, event- and chronostratigraphy Devonian reefs Devonian and Lower Carboniferous plate tectonics and Eovariscan tectonic Events Middle Palaeozoic stable isotopes Devonian trilobites
Additional affiliations
October 2001 - present
University of Münster
Position
  • Professor (Full)
November 1995 - September 2001
Museum für Naturkunde - Leibniz Institute for Research on Evolution and Biodiversity
Position
  • Head Curator of Invertebrate Palaeontology
October 1991 - October 1995
Freie Universität Berlin
Position
  • DFG Research and Habilitation Fellow

Publications

Publications (350)
Article
Full-text available
The Borkewehr section near Balve at the southeastern end of the Remscheid-Altena Anticline is currently the best and most complete Devonian/Carboniferous Boundary (DCB) succession of the Rhenish Massif, Germany. Based on a multidisciplinary approach, focusing on refined conodont and ammonoid biostratigraphy, microfacies analyses, sequence stratigra...
Article
Full-text available
The Hagen-Balve Reef Complex of the northern Rhenish Massif, Germany, is one of the best examples for the globally widespread Givetian to Frasnian reefs. At its eastern end, in the Hönne Valley, it reaches up to 1000 metres in thickness. In general, there is limited knowledge concerning the faunas and palaeoecology of Rhenish initial reef phases. A...
Article
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The famous Martenberg section of the eastern Rhenish Massif, Germany, type-section of classical Frasnian goniatite and conodont zonations, has been restudied in order to document the microfacies development and to refine the conodont stratigraphy around the global semichatovae Event/Transgression, the proposed level to define a future upper Frasnia...
Article
Full-text available
The cosmopolitan genus Gondwanaspis is one of two post-Taghanic (late Givetian to Frasnian) odontopleurid genera and the only genus of the Odontopleurida surviving the Lower Kellwasser Event, finally disappearing at the Upper Kellwasser Event. Although it is known from the Frasnian of Australia, Germany, France, Morocco, and Russia, findings of the...
Article
Full-text available
Abstract A new rich and diversified ostracode fauna from the Torkoz area (section Hassi Mouf South, Moroccan Anti-Atlas) is described and the ostracode distribution near the Early/Middle Devonian boundary is discussed. This ostracode fauna of a single limestone bed yields 32 taxa and is compared with the less-diversified ostracode fauna from an adj...
Article
A new rich and diversified ostracode fauna from the Torkoz area (section Hassi Mouf South, Moroccan Anti-Atlas) is described and the ostracode distribution near the Early/Middle Devonian boundary is discussed. This ostracode fauna of a single limestone bed yields 32 taxa and is compared with the less-diversified ostracode fauna from an adjacent par...
Conference Paper
Full-text available
The Middle Devonian was a phase of extensive reef systems on a global scale. In this context, one of the best-known examples is the Givetian-Frasnian Hönne Valley Reef Complex in the northern Rhenish Massif, Germany. While there are several studies on the reefal faunal composition and stratigraphy, there is a great lack of knowledge concerning micr...
Conference Paper
Full-text available
The famous Büdesheim Formation in the Eifel region (Germany, North Rhine- Westphalia) is known to be an extraordinary place to study upper Frasnian ammonoids. While previous studies focused mainly on the Gephuroceratidae, we take a closer look on the equally significant Tornoceratidae. A total of over 1400 well preserved tornoceratid ammonoids from...
Article
Full-text available
Eichholt, S. & Becker, R. T. & Aboussalam, Z. S. & El Hassani, A. & May, A. & Jansen, U. & Ernst, A. & El Kamel, F. (2021): Devonian of the Mechra Ben Abbou region (Rehamna) – new data on the reef succession, microfacies, stratigraphy, and palaeogeography. - Frontiers in Science and Engineering, vol. 10 (2): p. 109-152; Rabat, Maroc. Abstract The...
Article
Full-text available
Becker, R. T. & Aboussalam, Z. S. & El Hassani, A. & Baidder, L. & Hüneke, H. & Mayer, O. & Cozar, P. & Helling, S. & Seyffert, K. & May, A. (2021): Devonian and the Carboniferous transgression in the Skoura region, Sub-Meseta Zone, Morocco. - Frontiers in Science and Engineering, vol. 10 (2): p. 229-311; Rabat, Maroc. Abstract The Sub-Meseta Zone...
Article
Full-text available
Based on new field work, sampling for conodonts, ammonoids, and microfacies analysis, the allochthonous Lower/Middle Devonian stratigraphy and facies history of the Eastern Jebilet NNE of Marrakech is revised and refined. Silurian to Pragian partly siliceous black shales are assigned to the new Jebel Smaha Formation, which yielded HUVELIN (1977) in...
Chapter
Full-text available
The long-known Devonian of the Jebel Ardouz west of Marrakesh, and just north of Mzoudia, is composed of an allochthonous stack of clastic and carbonate rocks that were thrusted onto each other from the northeast. New biostratigraphic data prove an age range of sedimentation from the lower Eifelian to ?upper Famennian. The lowest, western thrust un...
Chapter
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Based on new field work, sampling for conodonts, ammonoids, and microfacies analysis, the Lower to Upper Devonian stratigraphy of the Benahmed region is refined. Fossiliferous neritic limestones of the Pragian/lower Emsian represent a continuation of the shallow carbonate platform of the Al Attamna region to the north (Units A/B of Sidi Ahmed Lemdo...
Chapter
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At Boudouda NW of Benahmed, upper Frasnian goniatite shales are in unconformable contact with massive, partly dolomitized conglomerate boulders of the new Oued Ayada Formation. They represent debris flow deposits of localized channels and contain reworked supposed Emsian reefal organisms and Frasnian to lower/?middle Famennian conodonts. Rare foram...
Chapter
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The upper Frasnian of the Boudouda Formation of the Benahmed region yielded a diverse, originally pyritized (secondarily limonitized) ammonoid fauna that resembles assemblages from contemporaneous goniatite shales of the Rhenish Massif (Germany: Büdesheim Formation). There are nine species each of the Tornoceratidae and Gephuroceratoidea (Gephuroce...
Article
The Upper Devonian of western Junggar, Xinjiang, northwestern China bears abundant marine fossils and has attracted much attention with respect to palaeontological and stratigraphical studies. However, the records of ammonoids are sparse and the previously established assemblages need to be supplemented or emended through further collections. Here,...
Article
Full-text available
Excavations in the Sand district of Bergisch Gladbach (Rhenish Massif, Germany) yielded a rich ammonoid fauna of the upper Frasnian “Archoceras” varicosum Zone (Upper Devonian I-K, interval between the two Kellwasser levels). The previously unknown assemblages include six tornoceratid genera with 20 species, including seven new species (Aulatornoce...
Article
Full-text available
Thirty Devonian-Carboniferous Boundary sections of the Rhenish Slate Mountains and adjacent subsurface areas are reviewed with respect to litho-, event, conodont, ammonoid, sequence, and chemostratigraphy. In the interval from the base of the uppermost Famennian (Wocklum Beds, Wocklumian) to the base of the middle Tournaisian (base Lower Alum Shale...
Chapter
All seven Devonian stages have been defined by Global Boundary Stratotype Sections and Points (GSSPs), but revisions of the base of the Emsian and of the Devonian–Carboniferous boundary are ongoing. Most of the Devonian Period was a time of exceptionally high sea-level stand and inferred widespread equable climates, but glaciations occurred immedia...
Article
Full-text available
A positive carbon stable isotope excursion of about 3‰ is documented in the topmost lower Frasnian at Padberg, eastern Rhenish Massif, as a muted record of the worldwide early−middle Frasnian isotopic perturbation (punctata Event; up to 6–8‰ shift in both δ¹³Ccarb and δ¹³Corg elsewhere), comparable with the Appalachian δ¹³C curve. This German isoto...
Conference Paper
Full-text available
The Carboniferous age Chepor Member of the Kubang Pasu Formation exposed in Perlis comprises thick mudstone with interbedded laminated and crossstratified sandstones and associated dropstones (Amir Hassan et al., 2014). The mudstone contains a rich marine invertebrate fossil assemblage, which includes rugose and tabulate corals, brachiopods, bivalv...
Article
During a fieldtrip of the 10th International Cephalopod Symposium to the Tafilalt (SE Morocco), a fauna with the so far oldest ammonoid of the region was discovered at the top of the basal Emsian Deiroceras Limestone of Jebel Mech Irdane. The new material confirms the record of a single, poorly preserved specimen of the same age from Ras El Kebbar...
Article
Review of 143 journal articles and book chapters dealing with Palaeozoic ammonoids published in 2014 to 2018.
Article
In March and April 2018, the 10th International Symposium Cephalopods—Present and Past (ISCPP) was held in Fes, Morocco. Meeting and the post-conference fieldtrip were organized by representatives of the Westfälische Wilhelms-Universität, Münster, the Mohammed V University of Rabat and Hassan II Academy of Sciences and Technology, the University Si...
Chapter
Full-text available
In March and April 2018, the 10th International Symposium Cephalopods-Present and Past (ISCPP) was held in Fes, Morocco. Meeting and the post-conference fieldtrip were organized by representatives of the Westfälische Wilhelms-Universität, Münster, the Mohammed V University of Rabat, Hassan II Academy of Sciences and Technology, Morocco, the Univers...
Article
The Hangenberg Crisis at the end of the Devonian is marked by a sudden global mass extinction (main Hangenberg Event), which was especially severe for ammonoids. Among the order Clymeniida, only the cymaclymeniids survived for a short time. We report the first discovery of Postclymenia cf. evoluta in South China in equivalents of the Hangenberg Bla...
Conference Paper
Full-text available
Although the facies and facies architecture of current-derived sediments in modern ocean basins have been mapped and preliminary described, little is known about facies, spatial distribution, temporal occurrence and facies architecture of fossil contourites in ancient marine basins. The ongoing project focuses on fossil calcareous contourites forme...
Article
The provenance of top-Famennian sedimentary rocks linked to the Hangenberg Crisis from the northern Rhenish Massif (Germany) was investigated by the means of detrital zircon U-Pb geochronology. Based on the obtained age spectra, three main tectonothermal domains are recognized as possible sources: Paleo- and Mesoproterozoic (~ 2000–1000 Ma) units o...
Article
The Middle Devonian (Givetian) of central Kentucky is represented by a complex and somewhat enigmatic succession of sandy dolomitic limestones and chert-rich wackestones, silty dolostones, and thin dark shales belonging to the Boyle Formation and Portwood Member of the New Albany Formation. The lower contact of the Boyle Formation is a distinct, re...
Article
Full-text available
Highlights - Lower Emsian dysoxic shales with the oldest bactritid and goniatite faunas. - Daleje Shale Equivalents with the globally oldest anarcestid faunas. - Rich Eifelian goniatite and nautiloid succession, interrupted by the global Chotec and Ka ák events. - Excellent ammonoid record around the global Taghanic and Frasnes Events. - Upper Fras...
Article
Full-text available
Highlights - Lower Emsian limestone at the base. - Daleje Shale Equivalents in the lower slope. -Rich upper Emsian-Eifelian goniatite and nautiloid succession. - Eifelian-Givetian global stratotype section and point (GSSP) with rich Ka ák Event Interval ammonoid fauna (including the globally oldest maenioceratids). - Middle Givetian Maenioceras Bed...
Article
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Introduction to the geology of the Eastern Anti Atlas (Tafilalt and Maider), Morocco; with focus on Devonian and Lower Carboniferous strata and Events.
Article
Full-text available
Highlights - Lower Emsian limestone at the base. - Daleje Shale Equivalents in the lower slope. -Rich upper Emsian-Eifelian goniatite and nautiloid succession. - Eifelian-Givetian global stratotype section and point (GSSP) with rich Ka􏰀ák Event Interval ammonoid fauna (including the globally oldest maenioceratids). - Middle Givetian Maenioceras Bed...
Article
Full-text available
Highlights - Lower Famennian black shales with (primary) pyritic cheiloceratids and large tree logs. - Middle Famennian goniatite shales at Madène el Mrakib. - Anoxic Lower and Upper Annulata Events. - Upper Famennian rich Platyclymenia faunas. - Hypoxic Dasberg Crisis Interval, followed by rich Gonioclymenia faunas. - Uppermost Famennian Wocklumer...
Article
ABSTRACT: Field and microfacies analyses of supposed Middle Devonian reef limestones at El Moussira (Haouz region south of Marrakech) showed that they represent in fact a shallowing upwards, shallow marine, crinoid-rich, open carbonate ramp that ends with a regionally unique, current/storm ridden, laminated microbial facies. Rare records of Mestogn...