Fabric variability associated with periglacial mass-wasting at Eagle Summit, Alaska

Orientation of gravels and soft-sediment clasts in subaqueous debrites – implications for palaeodirection reconstruction: case study from Puck Bay, northern Poland

“…3a, c). These results are similar to those obtained from subaerial debrites (e.g., Lawson, 1979;Eyles & Kocsis, 1988;Bertran et al, 1997), subaerial lahars (e.g., Mills, 1984;Major & Voight, 1986) as well as from periglacial colluvium (e.g., Millar, 2005). Experimental debris flows show that strongly aligned fabric can develop at a distance of several meters (Major, 1997(Major, , 1998.…”

A multiscalar and multiproxy geoarchaeological approach to site formation processes at the Middle and Upper Palaeolithic site of La Roche-à-Pierrot, Saint-Césaire, France

“…13 shows Schmidt diagrams with the density contour intervals, conical best fit, and the Fisher mean vector for three archaeological assemblages. The analysis reveals a micro-spatial variability in the orientation polarities, likely reflecting 1) immaturity of the diamictic deposits (i.e., intrinsic properties of the sediments), 2) influence of local topographical irregularities and buried palaeo-morphologies on the orientation of archaeological remains, and 3) interaction between archaeological and natural objects (e.g., the "blocking" effect) during sedimentary accretion (Bertran et al, 1997;Millar, 2005). Such combined factors suggest that the microenvironment likely influenced the observed patterning in artefact and bone orientations, as in Facies 3a at square J5 (Fig.…”

Glacial and periglacial geomorphology and its paleoclimatological significance in three North Ethiopian Mountains, including a detailed geomorphological map

“…Precipitation in the Ethiopian mountains varies with latitudes, altitude and aspect (Rosqvist, 1990;Nyssen et al, 2004;2005;Mark and Osmaston, 2008). Areas closer to the equator will have a longer wet season that tends to be bimodal, caused by the annual movement of the Intertropical Convergence Zone (O'Hare et al, 2005).…”

“…Rock fragment density in the profile was also recorded by counting the amount of rock fragments along a line of 2-3 m. Per, profile, 50 elongated clasts from the matrix were analyzed. The orientation was measured with a compass, and clast size and shape properties were measured on the basis of a-, b-, and c-axial lengths, using a caliper with 1 mm accuracy (Millar, 2005). This clast-derived information informs about the genesis of the landform and the environment in which the sediment had moved.…”