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 15 of 15 for “"mid-Pleistocene"”.
-
Magnetic records from latest Triassic to earliest Jurassic red beds, Utah and Arizona, and from mid-Pleistocene lake beds, New Mexico
… the latest Triassic to earliest Jurassic time. A mid-Pleistocene lake sedimentary record obtained from the Valles Caldera, northern New Mexico was investigated using rock magnetic and paleomagnetic techniques. Lake sediments span three glacial and two interglacial intervals, MIS 14 – 10. Both …
-
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.
… cycles. This work focuses on key sections in the middle and lower Danube Basin to i) investigate the origin of the loess 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 …
-
A reconstruction of the mid-to late Pleistocene plant community along the southwestern coast of South Africa using phytolith evidence
… Duinefontein (DFT) preserve important records of mid-Pleistocene human occupation along South Africa's southwestern coast. In addition to human fossils in the case of EFT, both sites have produced extensive collections of artefacts and faunal remains. Analyses of the latter have provided the broad …
-
ΠΕΡΙΒΑΛΛΟΝΤΑ ΙΖΗΜΑΤΟΓΕΝΕΣΗΣ ΚΑΙ ΠΑΓΕΤΟΕΥΣΤΑΤΙΚΕΣ ΚΙΝΗΣΕΙΣ ΤΩΝ ΤΕΤΑΡΤΟΓΕΝΩΝ ΑΠΟΘΕΣΕΩΝ ΤΗΣ ΠΕΡΙΟΧΗΣ Ν. ΜΑΝΩΛΑΔΑΣ-ΛΕΧΑΙΝΩΝ
… SEDIMENTARY SEQUENCES WERE DEPOSITED LATER THAN MID- PLEISTOCENE AND NOT DURING UPPER PLIOCENE, AS IT WAS BELIEVED BEFORE THIS STUDY. 2. THE EXAMINED AREA CONSISTS OF 4 GEOMORPHOLOGICAL ENVIRONMENTS: A.MOUNTAIN FRONT; B. PIEDMONT; C. MARINE TERRACE; D. COASTAL PLAIN. THE MOUNTAINFRONT IS …
-
Distribution and Rates of Quaternary Deformation within the Pampean Flat Slab Segment of the Central Andes of Argentina from 30-32°S
… for the Pampean Flat Slab since at least the Pleistocene, from both absolute and relative geomorphic slip rates. A shortening rate of ~0.4 mm/yr since Mid-Pleistocene was measured on the La Rinconada Fault Zone (LRFZ), which together with similarly low published slip rates on other regional …
-
Molecular Evolution in the Mountains: Genetic Affinity and the Environment led to Adaptive Variation in the American Pika (Ochotona princeps)
… evolved along divergent trajectories since the mid-Pleistocene. <em>Ochotona princeps</em> encounters cold temperatures, hypoxia, and dietary toxins, and therefore has thermoregulatory, metabolic, and behavioral adaptations related to these environmental challenges. Studies have confirmed …
-
Dati geochimici ed ecologici di foraminiferi planctonici. Implicazioni paleoceanografiche in due aree chiave: Oceano Meridionale e Mare Mediterraneo.
… di temperatura negli ultimi 13 ka e durante la Mid-Pleistocene Revolution. Le temperature, dedotte tramite i valori degli isotopi stabili dell’ossigeno, sono coerenti con le temperature attuali documentate in questa zona e il trend di temperatura è paragonabile a quelli riportati in letteratura …
-
Assessment of Statistical Methods Applied to Geochemical Data for Paleoenvironmental Interpretation: A Case Study from the Al-Azraq Basin, Jordan
… from the AZ2 sediments indicated periods of humidity and aridity, increased and decreased precipitation, and low and high chemical weathering. This study contributes to understanding the paleoenvironments of the Al-Azraq basin during the mid-Pleistocene period. Methods commonly used with …
-
Using a multiproxy analysis of springbok fossils to track 2 million years of vegetation changes experienced by hominins in southern Africa.
… the onset of the Walker Circulation and the Mid-Pleistocene Revolution, have been linked to palaeoenvironmental changes that catalysed hominin evolutionary events in Plio-Pleistocene Africa. Climate-induced faunal turnover has not been found in East Africa, largely due to local buffers of …
-
A molecular analysis of the population structure, mating system and demography of Eucalyptus
… expansion, which started around the early-mid Pleistocene transition. These trends suggested that the island populations expanded earlier while those on the mainland expanded faster. These appeared as two continuous expansions when the entire species was analysed. The results of this study …
-
A molecular analysis of the population structure, mating system and demography of Eucalyptus
… expansion, which started around the early-mid Pleistocene transition. These trends suggested that the island populations expanded earlier while those on the mainland expanded faster. These appeared as two continuous expansions when the entire species was analysed. The results of this study …
-
Application of platinum-group element (PGE) geochemistry to select geological problems
… are less mobile than Cu and Au. Mount Hagen, a mid-Pleistocene stratovolcano located in Western Highlands of Papua New Guinea, has a very complex tectonic setting that makes it challenging to unravel the history of magma evolution. Trends in the PGE, however, record evidence of two sulfide …
-
Application of platinum-group element (PGE) geochemistry to select geological problems
… are less mobile than Cu and Au. Mount Hagen, a mid-Pleistocene stratovolcano located in Western Highlands of Papua New Guinea, has a very complex tectonic setting that makes it challenging to unravel the history of magma evolution. Trends in the PGE, however, record evidence of two sulfide …
-
Glaciomarine sedimentation at the continental margin of Prydz Bay, East Antarctica : implications on palaeoenvironmental changes during the Quaternary
… the first deglaciation is associated with the mid-Pleistocene warming recognized around the Antarctic. In Prydz Bay, the Lambert Glacier-Amery Ice Shelf retreated far to the south and high biogenic productivity commenced or biogenic remains were better preserved due to increased sedimentation …
-
Antarctic glacial chronology : new constraints from surface exposure dating
… which is inferred from flow morphology. These mid-latitude, long term, 3He production rates reduce uncertainties previously introduced when scaling production rates calibrated at lower latitudes to Antarctica. The results also confirm the compositional dependence of 3He production rates …