The areal distribution and elevation of glacial drifts in Vernier Valley, southern Victoria Land, are used to reconstruct the PlioPleistocene history of upper Ferrar Glacier. Ne cosmogenic-nuclide analyses of surface cobbles on four moraines, Ferrar 1, 2, 3, and 4, provide age control. A minimum-age estimate for Ferrar Drifts calculated by assuming zero surface erosion indicates that the oldest...

Mechanistic models now exist to predict hydraulic conductivity (K) from the spectral-induced polarization (SIP) response of granular media. We examined the predictions of such a model on unconsolidated coarse fluvial sediments and compared them to those obtained with a modified Kozeny-Carman (KC) model. Samples were retrieved from the Boise Hydrogeophysical Research Site (BHRS), located on a gr...

Introduction: The Mars Exploration Rover Oppo-tunity has been exploring a portion of Meridiani Planum and has encountered a number of surface materials. These include light-toned sulfate-rich outcrop (the Burns Formation), basaltic sand, hematite-rich spherules, and, less commonly, dark-toned cobbles and dark-toned rind and fracture fill materials. The nature of the outcrop has been extensively...

A thin glacial diamicton, informally termed Granite drift, occupies the floor of central Beacon Valley in southern Victoria Land, Antarctica. This drift is ,1.0 m thick and rests with sharp planar contacts on stagnant glacier ice reportedly of Miocene age, older than 8.1 Ma. The age of the ice is based on 40Ar/39Ar analyses of presumed in situ ash-fall deposits that occur within Granite drift. ...

Over a broad size range, the shapes of impact fragments from catastrophic disruptions are distributed around mean axial ratio 2: √2: 1, irrespective experimental conditions and target materials. Although most blocks on asteroids likely to be fragments, there is not enough quantitative data for reliable statistics their three-axial lengths and/or ratios because it difficult precisely estimate he...

Fluvial strath terraces provide a record of river incision and the timing of climatic perturbations to the fluvial system. Dating depositional surfaces like terraces that are older than the range of C, however, is difficult. We employ a Ž . cosmogenic radionuclide CRN profile technique that addresses a major problem of CRN dating on such surfaces: nuclide inheritance. By measuring Be and Al pro...

The occurrence of volcanic basanite cobbles in Pleistocene terraces at Galloway and the upper Clutha valley Central Otago, an area devoid known edifices, has implications for Cenozoic intraplate volcanism drainage region. We present petrographic, mineralogical, whole rock geochemical Sr-Nd-Pb isotopic data, as well 39Ar-40Ar date 24.4 ± 0.06 Ma, together with mineral analyses enclosed peridotit...