scholarly journals dummyHistory of sedimentological research on clastic sediments with remarks on history of Russian sedimentology

1500 ◽  
Vol 99963 ◽  
pp. 99917-99923
Author(s):  
authorGalina dummyKirillova
Keyword(s):  
Clastic Sediments ◽  
History Of

scholarly journals Geological setting of vertebrate microfossil localities across the Cretaceous–Paleogene boundary in southwestern Saskatchewan, Canada

2015 ◽  
Vol 52 (10) ◽  
pp. 846-862 ◽  
Author(s):  
Cory M. Redman ◽  
James D. Gardner ◽  
Craig S. Scott ◽  
Dennis R. Braman
Keyword(s):  
French Fry ◽  
Geographic Locations ◽  
Continuous Sequence ◽  
Clastic Sediments ◽  
The Status ◽  
New Localities ◽  
History Of ◽  
State Of Affairs ◽  
Wounded Knee ◽  
Upper Maastrichtian

The Frenchman and Ravenscrag formations of southwestern Saskatchewan, Canada, record an apparently continuous sequence of nonmarine clastic sediments across the Cretaceous–Paleogene (K–Pg) boundary. Extensive exposures of these fossil-rich sediments occur in the Frenchman River Valley, near the towns of Ravenscrag, Eastend, and Shaunavon, and have been a focus of study since the 1970s. Despite this long history of investigation, a comprehensive account of the geographic and stratigraphic positions of many of the significant fossil localities has yet to be published. Given this state of affairs, the goals of this paper are to (i) document the geographic locations, stratigraphic positions, and lithologies of 11 key vertebrate microfossil localities, including several new localities that have been recently discovered, and (ii) provide an update on the status of these fossil localities, the majority of which have not been sampled in the last 20 years. Four fossil localities are known from the lower Paleocene Ravenscrag Formation, all of which are Puercan in age: Rav W-1 (Pu2), French Fry (Pu1), Croc Pot (?Pu2), and Pine Cree (?Pu2). With the exception of Rav W-1, which has since been lost as a consequence of quarry reclamation, all of the Ravenscrag Formation localities remain accessible and continue to be productive. Seven vertebrate microfossil localities from the upper Maastrichtian Frenchman Formation are reported here, all of which are Lancian in age: Long Fall, Fr-1, By Gar Gap, Hairpin, Wounded Knee, Wounded C, and Gryde. With the exception of Long Fall and Wounded Knee, which have been lost through reclamation or construction, all of the Frenchman Formation localities are accessible and remain productive.

Southwest New World Island stratigraphy: new fossil data, new implications for the history of the Central Mobile Belt, Newfoundland

1989 ◽  
Vol 26 (10) ◽  
pp. 2062-2074 ◽  
Author(s):  
Colleen G. Elliott ◽  
Christopher R. Barnes ◽  
Paul F. Williams
Keyword(s):  
New World ◽  
Mobile Belt ◽  
High Angle ◽  
Volcanic Island ◽  
Clastic Sediments ◽  
New Localities ◽  
History Of ◽  
Fossil Data

The identification of fossils from 16 new localities on southwestern New World Island has resulted in the refinement and simplification of local stratigraphy and in the correlation of rock units across an intensely deformed area. Complex stratigraphic classifications of earlier workers are replaced by a simpler scheme consisting of four formations: the Summerford Formation (oldest), Rogers Cove Formation, Sansom Formation, and Goldson Formation. Mélange units are fault related and cannot be included in the stratigraphy. Fossil and lithological data provided here confirm previous indications that the rocks of the Summerford Formation are the remains of a long-lived volcanic-island complex. This complex is overlain by a markedly diachronous coarsening-upwards sequence of marine clastic sediments, now represented by the Rogers Cove, Sansom, and Goldson formations.The new stratigraphic data, combined with structural evidence, indicate that the stratigraphy is repeated across several bedding-parallel faults. Significant diachroneity of formation boundaries and the absence of syndepositional high-angle faults suggest deposition in one large mid-Paleozoic basin rather than in a number of small dynamic basins.

scholarly journals ΤΗE PELAGONIAN NAPPE PILE IN NORTHERN GREECE AND FYROM. STRUCTURAL EVOLUTION DURING THE ALPINE OROGENY: A NEW APROACH

2017 ◽  
Vol 43 (1) ◽  
pp. 276 ◽  
Author(s):  
Ad. Kilias ◽  
W. Frisch ◽  
A. Avgerinas ◽  
I. Dunkl ◽  
G. Falalakis ◽  
...  
Keyword(s):  
Late Cretaceous ◽  
Late Jurassic ◽  
Structural Evolution ◽  
Shear Zones ◽  
Low Grade ◽  
Northern Greece ◽  
Alpine Orogeny ◽  
Clastic Sediments ◽  
History Of ◽  
Structural Levels

The geometry of kinematics and the deformation history of the Pelagonian nappe pile during the Alpine orogeny have been studied in Northern Greece and FYROM. Deformation was started in Middle-Late Jurassic time and was initially associated with ocean-floor subduction followed by ophiolites obduction, nappe stacking and duplication of the Pelagonian continent. The footwall Pelagonian segment from top to bottom was metamorphosed under greenschist to amphibolit facies conditions and a relative high pressure (T = 450o to 620o C and P = 12,5 to 8 kb). Blueschist facies metamorphic assemblages of Late Jurassic age are immediately developed between both hangingwall and footwall Pelagonian segments. Transgressive Late Jurassic-Early Cretaceous neritic limestones and clastic sediments on the top of the obducted ophiolites are maybe related to extension and basins formation simultaneously with the nappe stacking and metamorphism at the lower structural levels of the Pelagonian nappes. Contractional tectonics and nappe stacking continued during the Albian-Aptian time. Simultaneously retrogression and pressure decreasing taken place at the tectonic lower Pelagonian footwall segment. Low grade mylonitic shear zones, possible related to extension, are developed during Late Cretaceous time simultaneously with basins formation and sedimentation of neritic Late Cretaceous to Paleocene limestones and flysch. Intense shortening and imbrication under semi-ductile to brittle conditions occurred during Paleocene to Eocene time resulting the onset of the dome like formation of the footwall Pelagonian segment. The next stages of deformation from Oligocene to Quaternary are related to brittle extension and the final uplift and configuration of the Pelagonian nappe pile.

HYDROCARBON POTENTIAL OF THE NORTH WANGANUI BASIN, NEW ZEALAND

1977 ◽  
Vol 17 (1) ◽  
pp. 94
Author(s):  
H. McQuillan
Keyword(s):  
Sediment Supply ◽  
Source Rocks ◽  
Oil Companies ◽  
The North ◽  
Clastic Sediments ◽  
Potential Reservoir ◽  
History Of ◽  
Wrench Fault ◽  
Available Information ◽  
Coal Measures

The proximity of the North Wanganui Basin to the onshore Kapuni and offshore Maui gas/condensate fields of the adjacent Taranaki Basin has attracted the interest of oil companies for some time. Exploration during the late 1950's and early 1960's delineated several prospective traps. Some of these were subsequently drilled and, apart from minor gas indications, were dry holes. Data from the sixteen wells drilled are on open file and these together with other available information are incorporated in a series of maps representing stages in the evolution of the basin.The sedimentary history of the North Wanganui Basin began early in the Oligocene when a shallow north to south marine transgression saw the infilling of structurally defined northeast-southwest trending depressions in the folded Mesozoic basement. As the relief of the peripheral landmass was reduced the former basin irregularities were smoothed out and the way was paved for the spread of carbonate rich seas from which a suite of carbonate grainstones and packstones was deposited during the middle Oligocene. Late Oligocene time saw the renewed influx of clastic sediments as movements on the dominant wrench fault basement structure brought revived relief to areas of sediment supply. At that time the southern margin of the basin possibly merged westwards with the Taranaki Basin. Punctuated by periods of vulcanicity centred west of the present coastline, a thick sequence of mud, silt and sand, dominantly marine but locally including terrestrial coal measures, makes up the Miocene succession. Sedimentation controlled by growth faulting is characteristic, and the east-west barrier of the Pipiriki High persisted in restricting the southern extension of the basin during that time. The Miocene closed with a tilting movement hinged on the Pipiriki High such that subsequent Pliocene and Pleistocene sedimentation followed a south-east migrating depocentre in the quite separate South Wanganui Basin.Hydrocarbon indications in the basin itself are few. The presence there of potential reservoir and source rocks in addition to the proven production in the adjacent Taranaki Basin are reason for some optimism in the further evaluation of the hydrocarbon prospects of the North Wanganui Basin.

scholarly journals Namuliska jaskiniowe we współczesnym krajoznawstwie polskim – społeczna znajomość zagadnienia

2021 ◽  
Author(s):  
Maciej T. Krajcarz
Keyword(s):  
Social Groups ◽  
Point Of View ◽  
General Knowledge ◽  
Human Settlement ◽  
The Public ◽  
Geological Processes ◽  
Cave Deposits ◽  
Clastic Sediments ◽  
History Of ◽  
Source Of Information

Caves play an important role in tourist sightseeing. Some of them are eagerly visited by tourists due to the beautiful speleothems, the opportunity to see bats, the charm of underground passages and the aura of mystery. From the academic point of view, a particularly important element of caves is their deposits – the series of clastic sediments filling a cave cavity. They constitute an important source of information about the history and prehistory of human settlement in caves and their surroundings, and also the history of fauna and flora, the geological processes responsible for the accumulation of sediments and climate change. In this study, an evaluation of the importance of cave deposits to cave tourism is attempted, whether the Polish term „namulisko” (cave deposits) itself or the idea it expresses, is known in the public, and also how cave deposits are perceived by tourists, if at all, and which aspects are known. There was an attempt at recognition of this among tourists in the context of their general knowledge about caves. The research was carried out using anonymous questionnaires distributed among various social groups such as school and university students, teachers and tourists.

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