scholarly journals The processes of isolation of the Japanese main islands based on stratigraphic analysis of both molluscan and foraminiferal fossils, and the history of the Tokai earthquake

2021 ◽  
Author(s):  
Akihisa Kitamura
Keyword(s):  
Stratigraphic Analysis ◽  
Tokai Earthquake ◽  
History Of

A SHORT HISTORY OF PALEONTOLOGY IN TURKEY, PART I: FROM THE NINETEENTH CENTURY TO THE COLLAPSE OF OTTOMAN TURKEY

2021 ◽  
Vol 40 (1) ◽  
pp. 158-201
Author(s):  
VOLKAN SARIGÜL
Keyword(s):  
Nineteenth Century ◽  
Petroleum Exploration ◽  
Stratigraphic Analysis ◽  
Coal Beds ◽  
Geological Processes ◽  
Natural History Collection ◽  
History Of ◽  
Ottoman Turkey ◽  
The Rich ◽  
Military Engineering

ABSTRACT Modern paleontology in Turkey appeared in the early nineteenth century, together with the first modern geological studies. The fossils collected in these studies were initially used to establish biostratigraphy and to make the first geological maps of the country. Paleontologists were involved in these studies from the beginning; the earliest identifications of new animal and plant taxa from Turkey occurred in the same century along with the detailed descriptions of the rich and diverse Turkish fossil record. Aside from the academic studies, some paleontologists also took part in the economic side by contributing to stratigraphic analysis of coal beds or participating in petroleum exploration. All these pioneering works on the geology and paleontology of Turkey were done by foreigners; however, the outcomes of this newly introduced science were quickly appreciated by Ottoman Turkey. During the middle of the nineteenth century, the first text mentioning geological processes was written by the head scholar of the Imperial School of Military Engineering, while the first geology classes began to be taught under the Imperial Medical School in Istanbul, in which the first natural history collection was also established. Unfortunately, not a single original study in paleontology was produced by Ottoman citizens, with the notable exception of an Austrian immigrant of Hungarian descent, possibly because of a lack of a real interest in earth sciences.

Sequence stratigraphic analysis and sea-level history of the Upper Jurassic deposits (Mozduran Formation), south of Aghdarband, NE Iran

2018 ◽  
Vol 31 (8) ◽  
pp. 1097-1114 ◽  
Author(s):  
Ali Aghaei ◽  
Hamed Zand-Moghadam ◽  
Reza Moussavi-Harami ◽  
Asadollah Mahboubi
Keyword(s):  
Sea Level ◽  
Upper Jurassic ◽  
Sequence Stratigraphic ◽  
Stratigraphic Analysis ◽  
History Of ◽  
Ne Iran ◽  
And Sea Level

scholarly journals ENSEMBLE OF CONSTRUCTIVE TECHNIQUES IN THE CASTLE OF RICOTE (MURCIA, SPAIN)

2020 ◽  
Vol XLIV-M-1-2020 ◽  
pp. 1011-1016
Author(s):  
I. Almela ◽  
L. Martínez
Keyword(s):  
Fifteenth Century ◽  
Ninth Century ◽  
Complete Analysis ◽  
Rammed Earth ◽  
The West ◽  
Lime Mortar ◽  
Stratigraphic Analysis ◽  
Construction Techniques ◽  
History Of ◽  
The Village

Abstract. The Castle of Ricote, also known as Los Peñascales, is a fortification on a steep hill of the Ricote Valley overlooking the Vega Media of the Segura River, to the east, and the village of Ricote to the west. According to written sources, the history of this castle dates back from the ninth century. However, its military and administrative weight persisted even after the Christian conquest, when it became the headquarters of the Order of Santiago, until the fifteenth century. Despite its poor state of repair, the use of the castle overtime can be established on the site by means of a rather complex sequence of phases and a very heterogeneous set of construction techniques. Although it has been hard to accomplish a complete analysis, in this paper we have attempted a stratigraphic analysis and a synthesis of the techniques used in the medieval interventions, which are highly relevant due to their diversity and special features. Among them, the following have been covered: stonework with lime mortar built through shuttering, rammed earth, and lime-crusted rammed earth. In addition, the two main phases detected, and their respective techniques will also be underlined, since they are present consistently throughout the whole castle.

Tectonostratigraphic framework and depositional history of the Cretaceous–Danian succession of the Danish Central Graben (North Sea) – new light on a mature area

2017 ◽  
Vol 8 (1) ◽  
pp. 9-46 ◽  
Author(s):  
F. S. P. van Buchem ◽  
F. W. H. Smit ◽  
G. J. A. Buijs ◽  
B. Trudgill ◽  
P.-H. Larsen
Keyword(s):  
North Sea ◽  
Depositional Facies ◽  
Depositional History ◽  
Sequence Stratigraphic ◽  
Stratigraphic Analysis ◽  
The North ◽  
Economic Significance ◽  
History Of ◽  
The North Sea ◽  
Depositional Systems

AbstractAn integrated tectonic and sequence stratigraphic analysis of the Cretaceous and Danian of the Danish Central Graben has led to significant new insights critical for our understanding of the chalk facies as a unique cool-water carbonate system, as well as for the evaluation of its potential remaining economic significance.A major regional unconformity in the middle of the Upper Cretaceous chalk has been dated as being of early Campanian age. It separates two distinctly different basin types: a thermal contraction early post-rift basin (Valanginian–Santonian), which was succeeded by an inversion tectonics-affected basin (Campanian–Danian). The infill patterns for these two basin types are dramatically different as a result of the changing influence of the tectonic, palaeoceanographic and eustatic controlling factors.Several new insights are reported for the Lower Cretaceous: a new depositional model for chalk deposition along the basin margins on shallow shelves, which impacts reservoir quality trends; recognition of a late Aptian long-lasting sea-level lowstand (which hosts lowstand sandstone reservoirs in other parts of the North Sea Basin); and, finally, the observation that Barremian–Aptian sequences can be correlated from the Boreal to the Tethyan domain. In contrast, the Late Cretaceous sedimentation patterns have a strong synsedimentary local tectonic overprint (inversion) that influenced palaeoceanography through the intensification of bottom currents and, as a result, the depositional facies. In this context, four different chalk depositional systems are distinguished in the Chalk Group, with specific palaeogeography, depositional features and sediment composition.The first formalization of the lithostratigraphic subdivision of the Chalk Group in the Danish Central Graben is proposed, as well as an addition to the Cromer Knoll Group.

Offshore stratigraphic and geomorphological record of northeastern Ireland

2020 ◽  
Author(s):  
Mark Coughlan ◽  
Andy Wheeler ◽  
Mike Long ◽  
Ronan O'Toole ◽  
Matthew Service
Keyword(s):  
Sediment Cores ◽  
Formation Processes ◽  
Quaternary Deposits ◽  
Level Change ◽  
Stratigraphic Analysis ◽  
Geomorphic Features ◽  
History Of ◽  
The Last Glacial Maximum ◽  
Northeast Coast ◽  
The Last Glacial

<p>The onshore exposures on the northeast coast of the island of Ireland have been well studied in relation to regional glacial advances of the British and Irish Ice Sheet (BIIS) and changes in relative sea level change. These includes sites around Dundalk Bay, Carlingford Lough and Kilkeel in particular. During deglaciation of the BIIS, two important readvance phases are recorded locally; the Clogher Head and Killard Point Stadials. However, the offshore extent and record of these events is still poorly constrained. Understanding the nature and pattern of deglaciation of the offshore sectors of the BIIS is important to any attempt to reconstruct its history after the Last Glacial Maximum.</p><p>This study presents a new seismo-stratigraphic analysis of submarine Quaternary deposits nearshore, off the northeast coast of the island of Ireland. This includes multibeam echosounder (MBES), sparker seismic and core data from the areas of offshore Dundalk Bay, Carlingford Lough, Kilkeel and Dundrum Bay. Preliminary analysis of the data reveals a series of geomorphic features in each area including moraines, eskers, drumlinised landscapes, exposed till surfaces and infilled channels. Sediment cores will be used to further groundtruth these features and provide insights into their formation processes and timing. Initial inspection of these cores suggest two diamicton facies, assumed to be subglacial till, in the area of Kilkeel. This presentation will include results to date from this study with the aim of elucidating the glaciation and deglaciation history of geomorphologically complex area.</p>

Mountain glaciation and paleoclimate reconstruction in the Picos de Europa (Iberian Peninsula, SW Europe)

2012 ◽  
Vol 78 (2) ◽  
pp. 303-314 ◽  
Author(s):  
Enrique Serrano ◽  
Juan José González-Trueba ◽  
María González-García
Keyword(s):  
Late Quaternary ◽  
Ice Age ◽  
Equilibrium Line Altitude ◽  
Sedimentary Characteristics ◽  
Geomorphic Mapping ◽  
Stratigraphic Analysis ◽  
History Of ◽  
Northwestern Spain ◽  
The 19Th Century ◽  
Lake Deposits

AbstractGeomorphic mapping and stratigraphic analysis of a lake core document the late Quaternary glacial history of the Central and Eastern Massifs of the Picos de Europa, northwestern Spain. The distribution of glacial deposits indicates that at their most advanced positions glaciers occupied 9.1 km2, extended as far as 7 km down-valley and had an estimated equilibrium-line altitude (ELA) ranging between 1666 and 1722 m. Radiocarbon dating of sediment deposited in a lake dammed by moraines of this advance show that the maximum glacial extent was prior to 35,280 ± 440 cal yr BP. This advance was followed by two subsequent but less extensive late Pleistocene advances, recorded by multiple moraines flanking both massifs and sedimentary characteristics in the lake deposits. The last recognized glacial episode is the 19th-century maximum extent of small Little Ice Age glaciers in the highest cirques above 2200 m.

The history of tectonism on Venus: A stratigraphic analysis

2015 ◽  
Vol 113-114 ◽  
pp. 10-32 ◽  
Author(s):  
Mikhail A. Ivanov ◽  
James W. Head
Keyword(s):  
Stratigraphic Analysis ◽  
History Of

scholarly journals Uneven Horizons: Some Considerations on the Settlement History of Neolithic and Aeneolithic Sites in Southern Turkmenistan

2021 ◽  
Vol 32 ◽  
pp. 145-156
Author(s):  
I. Heit ◽  
Keyword(s):  
Large Scale ◽  
Settlement History ◽  
Stratigraphic Analysis ◽  
History Of

This paper considers the interpretation of “building horizons” in large-scale horizontal excavations of mul- tilayered settlements with mud-brick architecture of Neolithic and Aeneolithic of South Turkmenistan. The fine stratigraphic analysis of Early Aeneolithic layers at Monjukli Depe shows a differentiated picture of settlement history with a gradual re- placement of structures and varying duration of dwellings. Similar processes can be traced at other sites in the region.

Stratigraphy and U – Pb zircon geochronology of Kidd Creek: implications for the formation of giant volcanogenic massive sulphide deposits and the tectonic history of the Abitibi greenstone belt

1996 ◽  
Vol 33 (8) ◽  
pp. 1213-1231 ◽  
Author(s):  
Wouter Bleeker ◽  
Randall R. Parrish
Keyword(s):  
Detrital Zircon ◽  
Hanging Wall ◽  
Zircon Geochronology ◽  
Stratigraphic Analysis ◽  
Tectonic History ◽  
Volcanogenic Massive Sulphide ◽  
History Of ◽  
Detrital Zircon Ages ◽  
Giant Size ◽  
Age Constraints

Within the context of a structural–stratigraphic analysis of the giant Kidd Creek Cu–Zn–Ag deposit, precise U–Pb zircon ages have been obtained for five critical rock units associated with the deposit. Massive, flow-banded footwall rhyolite is dated at 2714.3 ± 1.2 Ma, slightly younger than a previously published age of 2717 ± 2 Ma on nearby rhyolite breccia. Extrusive rhyolite in the immediate hanging wall to the main ore lenses is dated at 2711.5 ± 1.2 Ma, leaving an interval of one to several million years for the formation of the deposit. We consider the demonstrated longevity of the Kidd Creek hydrothermal system as a major control on its giant size. Age constraints together with the size of the deposit suggest a time-averaged rate of base-metal sulphide deposition of about 10–100 t/year. Peak rates were likely one to possibly two orders of magnitude above time-averaged rates, hence 100–1000 t/year or higher. Detrital zircon ages on greywackes in the structural footwall to the deposit support structural observations that the metasediments are unrelated and significantly younger than the volcanics that host the deposit. All greywackes near Kidd Creek are younger than 2699 Ma and should be included in the Porcupine Group, which is redefined to include "Keewatin-age" greywacke turbidites that overlie the Krist Fragmental unit, but are themselves overlain by polymict conglomerates at the base of the Timiskaming sequence. The Prosser Porphyry, a quartz–plagioclase-porphyritic granitoid stock northeast of Kidd Creek, is dated at [Formula: see text] Ma, supporting structural observations that it is not a synvolcanic intrusion.

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