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After finishing his education in Northern Switzerland he moved back to Ticino in and is living in Cureglia since then. In , Filippo received a PhD in structural geology and tectonics at ETHZ with his dissertation focusing on mechanical and thermal aspects of extensional migmatitic domes in compressional orogens. Work experience In , he was visiting researcher at the argon geochronology laboratory at the Research School of Earth Sciences at The Australian National University. Skills He’s a field geologist with a strong background and expertise in structural geology, metamorphic petrology, geochronology and numerical modeling. His research interests include the study of geological processes from the micrometer to the kilometer scale, combining geological mapping with analytical and numerical techniques. Article in conference proceedings 35 Elements Bailey, L. In Geophysical Research Abstracts Vol. Evidence of a cumulate carbonatite in the lower crust?.

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Rock glaciers in Central and Eastern Austria: Distribution – Age – Genesis Begin of page section: The Schmidt-hammer used in the field for quantifying rock hardness. The Schmidt-hammer is a well-established relative age dating method widely used in geomorphology. Rock glaciers are characteristic landforms in mountain permafrost environments.

Schmidt hammer (SH) R-values are reported for surface clasts from numerically dated Holocene and Pleistocene fluvial terraces in the South Island of New Zealand. The R -values are combined with previously obtained weathering rind, radiocarbon, terrestrial cosmogenic nuclide and luminescence terrace ages to derive SH R -value chronofunctions for.

Landforms 31, — DOI: The exfoliation rate was obtained using a simple model in which the sheeting joints experience intermittent denudation, i. The analysis is useful for understanding the evolution of granite sheeting structures on this dome in Korea. From this it is possible to infer the erosion rates of bare bedrock surfaces. The available data are spatially limited or are from only certain environments. For example, the erosion rates of exposed rock surface on granitic and quartz-bearing sedimentary and volcanic rock has been estimated to be in the range of metres to tens of metres per million years Nishiizumi et al.

Measurement of 10Be in a bedrock tor, specifically an outcropping tower of granite exposed along the escarpment characteristic of the southeastern coast of Australia, suggests sequential exposure from a lowering soil mantle at c. Similar slow rates of erosion have been inferred from 10Be and 36Cl measurements on tors in the arid, granitic Alabama Hills of southern California and the semi-arid Llano uplift of central Texas, USA Bierman and Turner, Siliceous bedrock in the hyper-arid southern Negev Desert of Israel appears to be eroding somewhat faster metres to tens of metres per million years; Clapp et al.

The most stable bedrock surface exists in the Antarctic polar desert; estimates of the erosion rate based on 10Be are only fractions of a metre per million years Nishiizumi et al. Landforms such as domes, bornhardts and inselbergs are wrapped by sheeting joints sheet structure like the outer layers of an onion, as in the granites of Yosemite Valley, California Twidale et al.

Blockgletscher in Zentral- und Ostösterreich: Verbreitung – Alter – Genese

Results of trying to get these data: Followed links to get a list of sample locations. YES Data set title: An ancient glacial deposit termed the Sirius Group is a collection of Neogene deposits that crop out at high elevations throughout the Transantarctic Mountains TAM.

Chronological studies applying Schmidt-hammer exposure-age dating (SHD) were performed on six glacier forelands in the western part of the Southern Alps, New Zealand. Although lithological heterogeneity prevented a regional age-calibration curve to .

Earth Surface Processes and Landforms in press. Schmidt-hammer exposure ages from periglacial patterned ground sorted circles in Jotunheimen, Norway, and their interpretative problems. Geografiska Annaler A in press. A rock-surface microweathering index from Schmidt hammer R-values and its preliminary application to some common rock types in southern Norway. Catena , 35 — Modelling of future mass balance changes of Norwegian glaciers by application of a dynamical-statistical model.

Age difference rule dating

Meteorology and Atmospheric Physics, in press. Journal of Glaciology 64 , Acta Geologica Polonica 68 1 , Cryosphere 12 4 , Quaternary International ,

Schmidt-hammer exposure-age dating (SHD) was applied to a variety of late Quaternary periglacial and paraglacial landforms composed of coarse rock debris on Muckish Mountain, northwest Ireland.

In high and mid-latitudes, boulder fields are thought to form and be active during glacial periods; however, few quantitative data support this assertion. Here, we use in situ cosmogenic 10Be and 26Al to quantify the near-surface history of 52 samples in and around the largest boulder field in North America, Hickory Run, in central Pennsylvania, USA. Cosmogenic nuclide data demonstrate that Hickory Run, and likely other boulder fields, are dynamic features that persist through multiple glacial-interglacial cycles because of boulder resistance to weathering and erosion.

Long and complex boulder histories suggest that climatic interpretations based on the presence of these rocky landforms are likely oversimplifications. These features, particularly unvegetated boulder fields, boulder streams, and talus slopes areas of broken rock distinguished by differences in morphology and gradient [Wilson et al. Boulder fields have been documented throughout the world, including Australia Barrows et al.

Hundreds of such fields exist in eastern North America Nelson et al. Boulder field formation is usually explained by one of two process models, both of which invoke periglaciation as a catalyst for boulder generation and transport Rea, ; Wilson, Here, we report 52 measurements of 10Be and 25 measurements of 26Al in boulders and outcrops in and near the Hickory Run boulder field.

Data show that boulders in the field have moved over time and can have cosmogenic nuclide concentrations equivalent to at least k. We conclude that boulder fields survive multiple glacial-interglacial cycles, calling into question their utility as climatic indicators. The field sits on a low-relief upland surface underlain by gently folded, resistant Paleozoic sandstones and conglomerates.

Figure 1 Study site.

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In-situ produced 10 Be in moraine boulders, glacially trans- formed bedrock surfaces and rockfall accumulations constrains the timing of the Last Glacial Maximum LGM glacier expansion and provides chronological evidence for the post-LGM decay of one of the largest paleoglaciers in the range. The uncertainty-weighted mean age of The timing of these advances is broadly synchronous within the High Tatra Mts.

How to Cite. MATTHEWS, J. A. and OWEN, G. (), Schmidt hammer exposure-age dating: developing linear age-calibration curves using Holocene bedrock surfaces from the Jotunheimen–Jostedalsbreen regions of southern Norway.

This paper presents new data and discussion to clarify and to evaluate calibration procedures. These make a distinction between Schmidt Hammer drift following use instrument calibration , and variation between both individual Schmidt Hammers and between user strategies when utilising age-calibration curves age calibration. We show that while test anvil methods are useful for verifying that Schmidt Hammers maintain their standard R-values, they are inappropriate for instrument calibration except for the hardest natural rock surfaces R-values: A range of surfaces were tested using 3 N-Type Schmidt Hammers, which showed that existing anvil calibration procedures led to consistent overestimation of R-values by up to In contrast, new calibration procedures, which are based on the use of a calibration point which lies within the range of R-values measured in the field [Dortch et al.

Moreover, these new calibration procedures are more appropriate for age calibration as they incorporate operator variance through choice of sampling location. The inclusion of a further 29 terrestrial cosmogenic nuclide TCN exposure ages extends the calibration period to 0. To facilitate comparison between studies, an online calculator is made available at http:

Rock glaciers in Central and Eastern Austria: Distribution – Age – Genesis

Using cosmogenic 10Be dating to unravel the antiquity of a rocky shore platform on the west coast of Korea. Shore platforms commonly occur at the base of coastal cliffs on rocky shores. It is generally accepted that they form by the retreat of such cliffs through wave action and weathering processes. Some platforms show contemporary features; however, the possibility that some features were inherited from the last interglacial or earlier stages always exists.

Matthews, JA, Winkler, S () Schmidt-hammer exposure age dating (SHD): Application to early-Holocene moraines and a reappraisal of the reliability of terrestrial cosmogenic-nuclide dating (TCND) at Austanbotnbreen, Jotunheimen, Norway.

Using cosmogenic 10Be dating to unravel the antiquity of a rocky shore platform on the west coast of Korea. Shore platforms commonly occur at the base of coastal cliffs on rocky shores. It is generally accepted that they form by the retreat of such cliffs through wave action and weathering processes. Some platforms show contemporary features; however, the possibility that some features were inherited from the last interglacial or earlier stages always exists.

The occurrence of wide shore platforms in resistant rocks is often regarded as evidence of such inheritance because the short stillstands of the Holocene offered insufficient time for the sculpting of extensive platforms on resistant rocky coasts. This study focuses on dating the wide shore platforms, which are common on headlands along the west coast of the Korean Peninsula, based on the abundance of cosmogenic 10Be. Samples for cosmogenic 10Be surface exposure dating were collected along two transects oriented perpendicular to the cliff line.

The apparent surface exposure ages of the samples ranged from the Holocene ca. Given the apparent antiquity and range of the surface exposure ages, it seems likely that this shore platform originated in the Pleistocene, when sea levels were similar to those of today, and that the present shore platform is cutting into its interglacial predecessor. The generation and degradation of marine terraces. Basin Research 11 1: The Schmidt hammer in rock material characterization.

SCHMIDT-HAMMER EXPOSURE-AGE DATING (SHD)

Constraints on sediment transfer from the Andes to the coast of northern Chile While rates of denudation have been suggested as having the potential to link tectonic processes It is the transport, or not, of eroded material, not necessarily the rate at which that material is produced which is the critical factor in many models of tectonic-climatic interactions. The notable lack of sediment in sections of the Peru-Chile trench has been implicated as a key control of subduction zone processes and consequently Andean mountain building, but little empirical data on sediment transport in the region exists.

Here, we present the initial results of a study aiming to constrain the westward transfer of sediment from the Andes Mountains to the Pacific Coast of northern Chile by using in situ-produced cosmogenic nuclides.

Schmidt Hammer exposure dating (SHED): Calibration procedures, new exposure age data and an online calculator Author links open overlay panel Matt D. Tomkins a Jonny J. Huck a Jason M. Dortch a Philip D. Hughes a Martin P. Kirbride b Iestyn D. Barr c.

Spatio-temporal variability in elevation changes of two high-Arctic valley glaciers. Journal of Glaciology 56, , doi: Seasonal evolution of subglacial drainage and acceleration in a Greenland outlet glacier. Nature Geoscience 3, , doi: Constraints on past ice volume change. Geology 38, , doi: Last glacial ice-rafted debris off southwestern Europe: Journal of Quaternary Science 25, , doi: Semblance response to a ground-penetrating radar wavelet and resulting errors in velocity analysis.

Near Surface Geophysics 8, , doi: Boreas 40, , doi: Sedimentary signatures of basal ice formation and their preservation in ice-marginal sediments. Geomorphology , , doi: Role of glaciohydraulic supercooling in the formation of stratified facies basal ice:

Schmidt hammering in Alnesdalen 2017


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