Comprehensive temporal and spatial analysis of Early Pleistocene drainage patterns on the Swiss Alpine foreland

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F25%3A00617689" target="_blank" >RIV/67985530:_____/25:00617689 - isvavai.cz</a>

Result on the web

<a href="https://onlinelibrary.wiley.com/doi/epdf/10.1002/esp.70000" target="_blank" >https://onlinelibrary.wiley.com/doi/epdf/10.1002/esp.70000</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/esp.70000" target="_blank" >10.1002/esp.70000</a>

Result language

angličtina

Original language name

Comprehensive temporal and spatial analysis of Early Pleistocene drainage patterns on the Swiss Alpine foreland

Original language description

Deckenschotter are glaciofluvial gravels that cap isolated bedrock plateaus and are largely disconnected from today's local drainage. They were deposited when glaciers from the Alps were first extensive enough to reach the northern Swiss foreland, thus providing a unique record of the foreland landscape and its evolution during the earliest Quaternary glaciations. To decipher this record, we employ two robust methodologies: cosmogenic Al-26/Be-10 burial dating and GIS-based topographic analysis. Al-26/Be-10 burial ages from both new and published sites are calculated using a consistent procedure with the P-PINI code. Detailed swath projected and local 360 degrees profiles were generated with GIS data in an R-toolset developed specifically for this study. Integrating results from both methodologies with outcrop sedimentological data, we interpret three main periods of Deckenschotter deposition: 1.3-1.2, 1.1-1.0 and similar to 0.8 Ma. The interpreted age ranges indicate glaciers must have reached the forelands in response to intensifying climatic cooling across the Mid-Pleistocene Transition (1.25-0.75 Ma). Deckenschotter outcrops provide a disjointed image of past topography from which we piece together glacial meltwater pathways in each time interval. Between the glacial phases, stepwise incision of 50-100 m occurred as depicted in the projection profiles, with some spatial variability in magnitude of incision. Incision was driven by decreasing sediment supply during glacial terminations, set against a backdrop of minor foreland uplift. While the path of the Aare River has changed little since the Early Pleistocene, the Rhine River has radically altered its path. Initially a tributary of the Danube River with northward flow, glacial modification to topography led to its re-routing to the west into the lower base-level Aare River-Upper Rhine Graben system. Based on our analysis, we estimate this event occurred after similar to 0.8 Ma.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10508 - Physical geography

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Earth Surface Processes and Landforms

ISSN

0197-9337

e-ISSN

1096-9837

Volume of the periodical

50

Issue of the periodical within the volume

2

Country of publishing house

US - UNITED STATES

Number of pages

23

Pages from-to

e70000

UT code for WoS article

001425025300001

EID of the result in the Scopus database

2-s2.0-85218199108