scholarly journals Famennian ostracods from the Istanbul zone (Gebze, Kocaeli, NW Turkey) and their paleogeographical relations

2012 ◽  
Vol 63 (5) ◽  
pp. 355-363 ◽  
Author(s):  
Atike Nazik ◽  
Șenol Çapkinoğlu ◽  
Emine Șeker
Keyword(s):  
North Africa ◽  
Upper Devonian ◽  
Late Devonian ◽  
Rhenish Massif ◽  
Cantabrian Mountains ◽  
Holy Cross Mountains ◽  
Thin Walls ◽  
Nw Turkey ◽  
Conodont Zonation ◽  
First Time

Abstract Famennian (Late Devonian) ostracods of the Thuringian Mega-Assemblage were recovered for the first time from three incomplete sections of the Ayineburnu Member of the Büyükada Formation in the Denizliköy area (Gebze, NW Turkey), which were sampled for conodonts. Conodont faunas define an interval extending from the Upper rhomboidea? or Lower marginifera Zone into the Middle expansa Zone of the standard Upper Devonian conodont zonation. The ostracod faunas found here consist of species mainly with thin-walls, long spines and often smooth surfaces such as Rectonaria, Tricornina, Orthonaria, Triplacera, Beckerhealdia, Timorhealdia, Bohemina, Paraberounella and Acratia. These taxa indicate faunal relationship with Thuringia and the Rhenish Massif in Germany, the Cantabrian Mountains and Pyrenees in Spain, Holy Cross Mountains in Poland, North Africa and China.

Geochemical and palynological study of the Upper Famennian Dasberg event horizon from the Holy Cross Mountains (central Poland)

2010 ◽  
Vol 147 (4) ◽  
pp. 527-550 ◽  
Author(s):  
LESZEK MARYNOWSKI ◽  
PAWEŁ FILIPIAK ◽  
MICHAŁ ZATOŃ
Keyword(s):  
Water Column ◽  
Event Horizon ◽  
Large Scale ◽  
Land Plant ◽  
Organic Content ◽  
Significant Rise ◽  
Late Devonian ◽  
Holy Cross Mountains ◽  
Conodont Zonation ◽  
Palynological Study

AbstractIntegrated palynological, organic and inorganic geochemical and petrographical methods have been used for deciphering the depositional redox conditions and character of organic matter of the Famennian Dasberg event horizon from the deep-shelf Kowala succession of the Holy Cross Mountains. The ages of the investigated samples have been established, using miospore data, as VF (Diducites versabilis–Grandispora famenensis) and LV (Retispora lepidophyta–Apiculiretusispora verrucosa) miospore Zones of the Middle/Upper Famennian. In the standard conodont zonation, this corresponds to the uppermost postera to lowermost praesulcata Zones. The presence of green sulphur bacteria biomarkers and dominance of small-sized framboids together with the presence of large framboids and low values of the U/Th ratio may indicate that during sedimentation of the lower Dasberg shale, intermittent anoxia occurred in the water column, or the anoxic conditions prevailed in the upper part of the water column, while the bottom waters were oxygenated, at least briefly. Deposition of the upper Dasberg shale was characterized by both bottom water and water column anoxia. The lack of acritarcha taxa from these intervals could have been due to anoxia in the photic zone. Moreover, organic content is high in those samples. There is no geochemical evidence for anoxia during sedimentation of the deposits sandwiched between the lower and upper Dasberg shales, or in the deposits which underlie and overlie both Dasberg shale horizons. The two discrete anoxic events are interpreted to be the result of major transgressions and the blooming of primary producers. Above the Dasberg shales, small fragments of charcoal and raised concentrations of polycyclic aromatic hydrocarbons are detected. This supports the presence of wildfires during deposition of shales just above the boundary of VF/LV palynological zones. Temperatures calculated from the fusinite reflectance values suggest that the charcoal was formed in low-temperature ground and/or surface fires. The typical marine character of sedimentation combined with the high proportion of charcoals suggests that wildfires were large-scale, and that there was intensive transport of terrestrial material. The main causes of intensive wildfires were a significant rise of O2 in the atmosphere and important progress in the land plant diversity during Late Devonian times. Palynofacies studies suggest that the transgression corresponds to the part IIf of the Late Devonian sea-level curve.

Frasnian plants from the Dra Valley, southern Anti-Atlas, Morocco

2004 ◽  
Vol 141 (6) ◽  
pp. 675-686 ◽  
Author(s):  
BRIGITTE MEYER-BERTHAUD ◽  
MARTIN RÜCKLIN ◽  
AUDE SORIA ◽  
ZDZISLAW BELKA ◽  
HUBERT LARDEUX
Keyword(s):  
North Africa ◽  
Middle Devonian ◽  
First Record ◽  
Black Shales ◽  
Late Devonian ◽  
Single Specimen ◽  
Growth Rings ◽  
Marine Deposits ◽  
Conodont Zonation ◽  
Plant Assemblages

Anatomically preserved plant fragments are reported from Devonian marine deposits exposed in the Dra Valley of southern Anti-Atlas, Morocco. Associated conodont and tentaculite faunas indicate that the sediments yielding plants, which consist of black shales with intercalated calcareous concretions, are early Frasnian in age and most probably represent Zone 2 of the conodont zonation. This is the first record of Frasnian plants in North Africa. The specimens found all correspond to decorticated portions of axes. Six are referable to Callixylon, the organ genus corresponding to anatomically preserved axes of the progymnosperm tree Archaeopteris. Based on wood characters, especially ray structure, they are assigned to the species C. henkei, formerly described from the Famennian of Europe. One single specimen is compared to Xenocladia, a cladoxylopsid genus previously known from the Middle Devonian of Europe, USA and Kazakhstan. Interestingly, Archaeopteridales and Cladoxylopsida are two groups that dominate the younger plant assemblages of Famennian age recently described from the eastern Anti-Atlas. Callixylon henkei-type axes occur both in the Frasnian and in the Famennian deposits of the Anti-Atlas and they are all devoid of growth rings. These results are in accordance with a close position of Gondwana and Euramerica during Late Devonian times.

Late Devonian conodonts define the precise horizon of the Frasnian–Famennian boundary at Cinquefoil Mountain, Jasper, Alberta

1995 ◽  
Vol 32 (11) ◽  
pp. 1825-1834 ◽  
Author(s):  
K. Wang ◽  
H. H. J. Geidsetzer
Keyword(s):  
Upper Devonian ◽  
Late Devonian ◽  
Southeastern Margin ◽  
Carbonate Slope ◽  
Montagne Noire ◽  
Depositional Setting ◽  
First Time

Conodonts from carbonate slope sediments of the Ronde Member at Cinquefoil Mountain near Jasper, Alberta, have constrained the Frasnian–Famennian boundary in the Upper Devonian for the first time in Canada. Based on conodont Palmatolepis species, the Frasnian–Famennian boundary has been precisely identified in this section at the base of a tempestite bed (20 cm thick), 14 m above the base of the Ronde Member and directly below a prominent oncolite bed (65 cm thick). Recognized standard conodont zones are the Upper rhenana–linguiformis (or Montagne Noire Zone 13), the Lower triangularis, and the Middle triangularis zones. Conodonts exhibit a mixed Palmatolepis–Polygnathus–Icriodus biofacies, supporting the paleogeographic interpretation of this site as an upperslope depositional setting along the southeastern margin of the paleo-Jasper Basin.

scholarly journals Upper Frasnian Tornoceratidae (Ammonoidea) from the Sand Formation (Bergisch Gladbach-Paffrath Syncline, Rhenish Massif)

PalZ ◽  
2021 ◽  
Author(s):  
Till Söte ◽  
Ralph Thomas Becker ◽  
Karl Josef Herd ◽  
Jürgen Bockwinkel
Keyword(s):  
New Species ◽  
North Africa ◽  
Global Scale ◽  
Assemblage Structure ◽  
Species Level ◽  
Upper Devonian ◽  
Rhenish Massif ◽  
High Genus ◽  
Ammonoid Fauna ◽  
New Type

AbstractExcavations 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 (Aulatornoceras steinhauseni sp. nov., Aul. frenklerae sp. nov., Aul. ventrosulcatum sp. nov., Crassotornoceras nudum sp. nov., Cr. hetzeneggeri sp. nov., Retrotornoceras juxi sp. nov., Tornoceras aequilobum sp. nov.) and taxa described in open nomenclature. There are five associated gephuroceratid genera with nine species. The unexpectedly high genus- and species-level diversity at Sand, supported by statistical indices, is unprecedented compared to other contemporaneous ammonoid faunas. It highlights the currently fragmentary knowledge of top-Frasnian ammonoid faunas on a global scale. Phoenixites frechi, the dominant tornoceratid of hypoxic and organic-rich Kellwasser facies of Europe and North Africa, is completely missing at Sand. The local assemblage structure is analyzed statistically and interpreted in terms of palaeoecology. The occurrence of a new type of “Housean Pits”, probably caused by parasitism, is found in nine species of five genera, mostly in tornoceratids. The Sand fauna indicates that the species origination rate in tornoceratids remained high after the Lower Kellwasser Event.

Class Trilobita in the Wocklum Limestone of the northern Rhenish Massif east of the Rhine (late Famennian, Late Devonian) – Part 1. Phillipsiidae and Proetidae

2020 ◽  
Vol 298 (2) ◽  
pp. 203-233
Author(s):  
Martin Basse ◽  
Ulrich Lemke
Keyword(s):  
Type Species ◽  
Late Devonian ◽  
Rhenish Massif ◽  
First Time

In 1926, Rudolf & Emma Richter published the first and so far only monograph of the Late Devonian trilobites. Most of these are in need of revision for technical reasons. In recent years there has been some interesting progress in connection with research on the Devonian- Carboniferous boundary and the Hangenberg Event. The trilobites of the latest Famennian Wocklum Limestone, which belong to the Proetoidea and Phacopinae, are locally the last before the event. They are ex- tensively investigated only by sites at Apricke. The combination of corresponding data with new and updated old information from all other important sites provides for the first time a modern overview of the trilobite fauna. This is important for understanding aspects of the event. The Proetoidea is first in- vestigated in detail. On the basis of previously unpublished finds, the type species of Pseudo waribole and Waribole are documented relatively extensively for the first time. The exact knowledge of their morphology is important for phylogenetic examinations. Eowinterbergia effenbergensis sp. nov. is the first proof for this genus for the German Late Devonian. The demarcation of the Wocklum Limestone against the underlying Dasberg Limestone is only possible faunistically. Species of Helio proetus seem suitable for this, as an example shows. Balvibole kaufmanni gen. et sp. nov. from the Dasberg Limestone is another eyeless cyrtosymboline in the late Famennian.

Sourcebook in the Mathematics of Medieval Europe and North Africa

2016 ◽  
Keyword(s):  
North Africa ◽  
Cultural Influences ◽  
Mathematical Induction ◽  
Cross Cultural ◽  
General Introduction ◽  
Extensive Survey ◽  
Medieval Europe ◽  
Ceva’S Theorem ◽  
Arabic Speaking ◽  
First Time

Medieval Europe was a meeting place for the Christian, Jewish, and Islamic civilizations, and the fertile intellectual exchange of these cultures can be seen in the mathematical developments of the time. This book presents original Latin, Hebrew, and Arabic sources of medieval mathematics, and shows their cross-cultural influences. Most of the Hebrew and Arabic sources appear here in translation for the first time. Readers will discover key mathematical revelations, foundational texts, and sophisticated writings by Latin, Hebrew, and Arabic-speaking mathematicians, including Abner of Burgos's elegant arguments proving results on the conchoid—a curve previously unknown in medieval Europe; Levi ben Gershon's use of mathematical induction in combinatorial proofs; Al-Muʾtaman Ibn Hūd's extensive survey of mathematics, which included proofs of Heron's Theorem and Ceva's Theorem; and Muhyī al-Dīn al-Maghribī's interesting proof of Euclid's parallel postulate. The book includes a general introduction, section introductions, footnotes, and references.

scholarly journals A review of the Sarcophaga (Heteronychia) (Diptera: Sarcophagidae) of Sardinia

Zootaxa ◽  
2009 ◽  
Vol 2318 (1) ◽  
pp. 566-588 ◽  
Author(s):  
DANIEL WHITMORE
Keyword(s):  
Canary Islands ◽  
North Africa ◽  
Junior Synonym ◽  
Arthropod Diversity ◽  
Italian Regions ◽  
Males And Females ◽  
First Time

An account is given of the species of Sarcophaga Meigen, 1826 subgenus Heteronychia Brauer & Bergenstamm, 1889 known from the island of Sardinia (Italy). Most of the nearly 1,400 specimens examined were collected in the SW part of the island during 2003–2006 as part of a project investigating the arthropod diversity of the Monti Marganai and Montimannu areas (respectively Carbonia-Iglesias and Medio Campidano provinces). The study resulted in the finding of eight species of Heteronychia, six of which are recorded from Sardinia for the first time. Sarcophaga (Heteronychia) penicillata Villeneuve, 1907, previously mentioned in the literature, is excluded from the fauna of the island. Sarcophaga (Heteronychia) thirionae (Lehrer, 1976) is recorded for the first time from Europe and North Africa (Algeria). One species, Sarcophaga (Heteronychia) gabrielei sp. nov., from various sites in the limestone massif of Marganai, is described as new. Previously unpublished records from other Italian regions and from other countries (Algeria, Canary Islands, Greece) are also given for several species. Sarcophaga (Heteronychia) schnabli Villeneuve, 1911 is recognized as a junior synonym of S. (H.) consanguinea Rondani, 1860 syn. nov. The possible synanthropy of Sarcophaga (Heteronychia) pandellei (Rohdendorf, 1937) is briefly discussed. A key to males and females of all known Sardinian and Corsican species of Sarcophaga (Heteronychia) is provided.

scholarly journals Further observations on North African and South Iberian Bathyporeia (Crustacea, Amphipoda), with the description of a new species

2005 ◽  
Vol 74 (3-4) ◽  
pp. 279-300
Author(s):  
Cédric d’Udekem d’Acoz ◽  
Hind Myrieme Chams Echchaoui ◽  
Mohamed Menioui
Keyword(s):  
New Species ◽  
North Africa ◽  
New Records ◽  
Southern Spain ◽  
North African ◽  
Characteristic Species ◽  
South Portugal ◽  
First Time ◽  
A New Species

A new species of amphipod, Bathyporeia watkini sp. nov. from the Atlantic coasts of North Africa is described. This very characteristic species is abundant in some lagoons and estuaries near 28°N. New morphological information on B. elkaimi d’Udekem d’Acoz and Menioui, 2004 is given after specimens that were recently collected on the Atlantic coasts of southern Spain and South Portugal. The male of B. ledoyeri d’Udekem d’Acoz and Menioui, 2004 is described for the first time and new records of North African B. guilliamsoniana (Bate, 1857) and B. chevreuxi d'Udekem d'Acoz and Vader, 2005a are discussed.

Paths of Prayers in Ottoman North Africa

2021 ◽  
Vol 12 (3-4) ◽  
pp. 295-341
Author(s):  
Deniz Beyazit
Keyword(s):  
New York ◽  
Seventeenth Century ◽  
Ottoman Empire ◽  
North Africa ◽  
Complex Dynamics ◽  
North African ◽  
The North ◽  
Local Traditions ◽  
First Time ◽  
Visual Apparatus

Abstract This article discusses The Met’s unpublished Dalāʾil al-khayrāt—2017.301—(MS New York, TMMA 2017.301), together with a group of comparable manuscripts. The earliest known dated manuscript within the corpus, it introduces several iconographic elements that are new to the Dalāʾil, and which compare with the traditions developing in the Mashriq and the Ottoman world in particular. The article discusses Dalāʾil production in seventeenth-century North Africa and its development in the Ottoman provinces, Tunisia, and/or Algeria. The manuscripts illustrate how an Ottoman visual apparatus—among which the theme of the holy sanctuaries at Mecca and Medina, appearing for the first time in MS New York, TMMA 2017.301—is established for Muhammadan devotion in Maghribī Dalāʾils. The manuscripts belong to the broader historic, social, and artistic contexts of Ottoman North Africa. Our analysis captures the complex dynamics of Ottomanization of the North African provinces of the Ottoman Empire, remaining strongly rooted in their local traditions, while engaging with Ottoman visual idioms.

A new species of Hyattechinus (Echinoidea) from the type Devonian of the United Kingdom and implications for the distribution of Devonian proterocidarid echinoids

2018 ◽  
Vol 156 (5) ◽  
pp. 801-810 ◽  
Author(s):  
JEFFREY R. THOMPSON ◽  
TIMOTHY A. M. EWIN
Keyword(s):  
New Species ◽  
Sea Urchins ◽  
Appalachian Basin ◽  
Upper Devonian ◽  
Late Devonian ◽  
New Taxon ◽  
The North ◽  
Late Palaeozoic ◽  
Diversity Dynamics ◽  
A New Species

AbstractMany of the most diverse clades of Late Palaeozoic echinoids (sea urchins) originated in the Devonian period. Our understanding of diversity dynamics of these Late Palaeozoic clades are thus informed by new systematic descriptions of some of their earliest members. The Proterocidaridae are a diverse and morphologically distinct clade of stem group echinoids with flattened tests and enlarged adoral pore pairs, which are first known from the Upper Devonian. We herein report on a new species of Hyattechinus, Hyattechinus anglicus n. sp., from the Upper Devonian of the North Devon Basin, Devon, UK. This is the first Devonian Hyattechinus known from outside of the Appalachian Basin, USA, and provides novel information regarding the palaeogeographic and stratigraphic distribution of proterocidarids in Late Devonian times. We additionally update the stratigraphic distribution of Devonian Hyattechinus from the Appalachian Basin, following recent biostratigraphic resolution of their occurrences. Hyattechinus appears to have been present in the Rheic echinoderm fauna during Late Devonian times, and comparison of the palaeoenvironmental setting of Hyattechinus anglicus with that of other Hyattechinus from the Famennian of the Appalachian Basin suggests that the genus may have preferred siliciclastic settings. Furthermore, this new taxon increases the diversity of echinoids from the Upper Devonian of Devon to three species.

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