Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 14 of 14 for “"chronostratigraphy"”.
-
Geochemical Approaches to Paleobiology, Paleoclimatology, and Chronostratigraphy of the Cretaceous Cloverly Formation
This dissertation explores the use of geochemical tools to evaluate the timing and nature of biotic and environmental change in the Cloverly Formation. Carbon isotope stratigraphy presented here suggests that the fossiliferous interval of the Cloverly is constrained to mid-late Albian in age, …
-
Recalibrating the breakup history of SW Gondwana: the first U-Pb chronostratigraphy for the Uitenhage Group, South Africa
… and highlights the importance of high-resolution chronostratigraphy when investigating the tectonic, palaeontological and palaeogeographical records from the final moments of a unified Gondwana.
-
Late Paleozoic Chronostratigraphy and Tectonostratigraphy of Pericratonic Terranes near Barkerville, British Columbia: Implications for the Lower Permian (Asselian) Sugar Limestone
The Lower Permian Sugar limestone unit is a discontinuous calci-tubidite deposit in the Barkerville Terrane near Barkerville, British Columbia. It is here interpreted that the Pundata Thrust, which transported the Slide Mountain Terrane over the Barkerville and Cariboo terranes, separates the Sugar …
-
Carbon Cycle Trends Recorded By Organic Carbon Stable Isotopes In Paleocene Strata, Benton County, Mississippi: Implications For Chronostratigraphy Of The Porters Creek And Naheola Formations
… allows the establishment of a more precise chronostratigraphy, revising the previously established depositional range of the porters creek and naheola from 63.8-56 ma to 60.5-56.6 ma.
-
Position of the Triassic-Jurassic boundary in South Africa and Lesotho : a multidisciplinary approach aimed at improving the chronostratigraphy and biostratigraphy of the Elliot Formation, Stormberg Group
The continental red bed succession of the main Karoo Basin in South Africa and Lesotho, the Elliot Formation (Stormberg Group, Karoo Supergroup), is a significant stratigraphic unit for the regional and global understanding of the Late Triassic - Early Jurassic evolution of terrestrial vertebrate …
-
Climatic and tectonic controls on deep water sedimentary cyclicity : evidence from the Miocene to Pleistocene of Cyprus
… to European and New Jersey Margin sequence chronostratigraphy. Three smaller scales of cyclicity are identified by stratigraphic time series analysis, and are likely to correspond to the 100 kyr, 41ky and ~20 ky Milankovitch cycles. Stable oxygen and carbon isotope analysis on …
-
Investigations of the geomorphologic and pedologic system of sedimentary vega deposits from Lanzarote (Canary Islands) supported by luminescence dating – important steps towards their palaeoclimatic interpretation
… properties). Furthermore, we built up a chronostratigraphy using different luminescence-methods (quartz coarse- and fine grain-OSL, polymineral fine grain-IRSL). Fundamental investigations on the bleaching-behaviour of recent Saharan dust and colluvial sediments on Lanzarote demonstrate, …
-
Reconstruction of the Late and Mid-Pleistocene climate and landscape history in SE-Central Europe - A paleopedological and geochemical multi-proxy approach in loess-paleosol studies.
… and archive genesis, ii) to set up a reliable chronostratigraphy and iii) to contribute to the reconstruction of the Mid- and Late Pleistocene climate and landscape history of the region by a paleopedological – geochemical multi-proxy approach. Furthermore, methodological investigations aim to …
-
The Pleistocene History of the Birmingham District
… across the district using lithostratigraphy, chronostratigraphy, and biostratigraphy. Overall, their geological evidence establishes the former presence of Wolstonian glacial ice in the Birmingham district about c.183.5 ka, during MIS 6. This reconstruction is consistent with evidence for …
-
PALAEOECOLOGY, PALAEOENVIRONMENTAL ANALYSIS AND THEIR APPLICATION TO SEQUENCE STRATIGRAPHY: LOWER CRETACEOUS, LUSITANIAN BASIN, PORTUGAL
… correlate with previously published sequence chronostratigraphy for the Tethyan realm. The palaeoecological analysis indicates that 2nd and 3rd order sequences are controlled by allocyclic processes and that 4th order cycles (sequences and parasequences) were dominated by autocyclic processes. …
-
Uranium-Lead dating of hominid fossil sites in South Africa
… complex stratigraphic relationships that render chronostratigraphy uncertain. More importantly it lends further information on how South African hominids fit into the family tree. At 2.2Ma StW 573 may come under the classification of Australopithecus africanus and be contemporaneous with the …
-
The Karoo sand sea in changing climates: Early Jurassic interdune lakes and erg dynamics in southern Africa
… a very small detrital zircon dataset, the bioand chronostratigraphy of the conformably underlying Elliot Formation and the radioisotopic dates of Drakensberg Group basalts that are conformably overlying the Clarens Formation. Thus far, few investigations have targeted the evolution of this Early …
-
Τεταρτογενής εξέλιξη του ανατολικού Κορινθιακού κόλπου
Ο Κορινθιακός Κόλπος είναι η δεύτερη πιο ενεργή ηπειρωτική τάφρος στον κόσμο και ως εκ τούτου ένα ιδιαίτερο φυσικό εργαστήριο για την ανάλυση της ιστορίας διάνοιξης ηπειρωτικών τάφρων. Μια νέα λεπτομερής θαλάσσια σεισμική έρευνα σε συνδυασμό με δεδομένα που είχαν αποκτηθεί στο λιγότερο μελετημένο …