Philippos Garefalakis

Philippos Garefalakis
Universität Bern | UniBe · Institute of Geological Sciences

MSc in Earth Sciences

About

16
Publications
4,490
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32
Citations
Introduction
Philippos Garefalakis works at the Institute of Geological Sciences, University of Bern. His research focuses on the Principles of Clastic Sedimentology, Basin Analysis, and Geology. Currently, Philippos is working on the evolution of the North Alpine Foreland Basin (acc. Swiss Molasse basin) during Oligocene to Miocene times, with a focus on the transport and deposition of coarse-grained material (conglomerates) from alluvial megafans.
Additional affiliations
August 2019 - present
University of Bern
Position
  • PhD Student
Description
  • Research in the field of Sedimentology, Geology
March 2016 - July 2019
University of Bern
Position
  • Student Assistant
Description
  • Assistant during lecture classes, field courses and excursions - Involved in projects, administrative support - Organized events
January 2013 - August 2014
Asendia - Swiss Post
Position
  • Commercial Employee
Description
  • Inquiries of lost mail/parcel - Direct contact with customers - Multilingual communication
Education
September 2017 - July 2019
University of Bern - Institute of Geological Sciences
Field of study
  • Geology, Earth Sciences
September 2014 - August 2017
University of Bern - Institute of Geological Sciences
Field of study
  • Geology, Earth Sciences

Publications

Publications (16)
Article
Full-text available
The stratigraphic architecture of the Swiss Molasse basin, situated on the northern side of the evolving Alps, reveals crucial information about the basin's geometry, its evolution, and the processes leading to the deposition of the siliciclastic sediments. Nevertheless, the formation of the Upper Marine Molasse (OMM) and the controls on the relate...
Preprint
Full-text available
The stratigraphic architecture of the Swiss Molasse basin reveals crucial information about the basin’s geometry, its evolution and the processes leading to the deposition of the clastic material. Nevertheless, the formation of the Upper Marine Molasse (OMM) and the controls on the related Burdigalian transgression are not fully understood yet. Dur...
Article
Full-text available
Clast imbrication is one of the most conspicuous sedimentary structures in coarse-grained clastic deposits of modern rivers but also in the stratigraphic record. In this paper, we test whether the formation of this fabric can be related to the occurrence of upper flow regime conditions in streams. To this end, we calculated the Froude number at the...
Article
Full-text available
Large sediment fluxes from mountain belts have the potential to cause megafans to prograde into the neighbouring sedimentary basins. These mechanisms have been documented based from numerical modelling and stratigraphic records. However, little attention has been focused on inferring temporal changes in the concentrations of supplied sediment from...
Article
Full-text available
In this paper, we document that glaciofluvial gravel sequences and glacial till deposits that are exposed in the Müntschemier and Finsterhennen gravel pits (Swiss Plateau west of Bern) record three glacial advances during the Birrfeld Glaciation, which corresponds to the last glacial cycle. Sedimentological logging shows that both gravel pits expos...
Preprint
Data on grain sizes of pebbles in gravel-bed rivers are of key importance for the understanding of river systems. To gather these data efficiently, low-cost UAV (unmanned aerial vehicle) platforms have been used to collect images along rivers. Several methods to extract pebble size data from such UAV imagery have been proposed. Yet, despite the ava...
Conference Paper
Full-text available
Grain size trends preserved in large-scale coarsening- and thickening-upward sequences within foreland basins reflect the evolution of the adjacent mountain belt. The stratal pattern is controlled to a high degree by tectonic, lithologic or climatic controls and which lead to variations in hydrological conditions, and which also control sediment di...
Article
Full-text available
We present field observations from coarse-grained streams in the Swiss Alps and the Peruvian Andes to explore the controls on the probability of material entrainment. We calculate shear stress that is expected for a mean annual water discharge and compare these estimates with grain-specific critical shear stresses that we use as thresholds. We find...
Data
Supplement of "Tectonic processes, variations in sediment flux, and eustatic sea level recorded by the 20 Myr old Burdigalian transgression in the Swiss Molasse basin" by Philippos Garefalakis and Fritz Schlunegger (2019, Solid Earth).
Preprint
Full-text available
Abstract. Conceptual models suggest that the mobility of fluvial gravel bars is mainly controlled by sediment discharge. Here we present field observations from streams in the Swiss Alps and the Peruvian Andes to document that for a given water runoff, the probability of bedload transport also depends on the sorting of the bed material. We calculat...
Conference Paper
Full-text available
Interpretations of marine transgressions have been contested because of multiple possible controls. This has particularly been the case for the Upper Marine Molasse (OMM) deposited north of the evolving Alps, where the 20 Ma-old Burdigalian transgression has either been related to a tectonic, eustatic or surface control. Here, we reassess this prob...
Poster
Full-text available
We explain through a stratigraphic approach the link between changes of the foreland plate underlying the Swiss Molasse and the raise of the Aar-massif in the adjacent Alps
Preprint
Full-text available
Clast imbrications are presumably the most conspicuous sedimentary structures in coarse-grained clastic deposits. In this paper, we test whether the formation of such a fabric is related to changes from lower to upper flow regime conditions in streams. To this extent, we calculate the Froude number at the incipient motion of coarse-grained bedload...
Conference Paper
Full-text available
The North Alpine foreland basin deposits reveal crucial information about basin-underfilled and -overfilled conditions and the controls on the basin’s geometry through time. Here, we focus on the early Burdigalian, c. 320 m-thick shallow marine sequence of the Upper Marine Molasse group (OMM) exposed in the Sense section, Western Switzerland . Thes...
Conference Paper
Full-text available
Large-scale coarsening and thickening upward megasequences in foreland basins have conventionally been considered to reflect megafan progradation. This is particularly the case for the Late Oligocene, c. 4 km-thick suite of the Rigi megafan conglomerates, situated in the North Alpine Foreland Basin in Central Switzerland, where previous authors hav...

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