New constraints on the Slate Islands impact structure: comments and reply

Article Abstract:

Surviving remnants of the original breccia lens along the flanks of the Slate Islands suggest that the region was far from heavily eroded. The erosion level is lesser than 350m because the base of the lens at its inner flank is shallow. However, critics argue that significant erosion has taken place because the paleomagnetic data used did not make any allowance for inward translation thereby resulting in a minimum height estimate. In addition, shallow erosion does not account for the low recorded shock pressures in the parautochtonous rocks of the floor.

Observations, Erosion, Erosion (Geology), Breccia

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Interplay of static loads and subduction dynamics in foreland basins: reciprocal stratigraphies and the "missing" peripheral bulge: comment and reply

Article Abstract:

Octavian Catuneanu and associates conducted a research on the role of dynamic topography in tectonic subsidence and stratal patterns in foreland basins. They concluded that subsidence can develop additional accommodation on and cratonward of the peripheral forebulge which results in the preservation of reciprocal strata. They made a number of errors in their research including the emphasis on variations in magnitude of the orogenic flexural load, ignoring variations in load position.

Submarine topography, Catuneanu, Octavian

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Radiocarbon constraints on ice sheet advance and retreat in Weddell sea, Antarctica

Article Abstract:

Researchers are studying the possibility that the West Antarctic ice sheet may collapse due to the existence of the Heinrich events, a large mass of ice-rafted debris in deep sea sediments from the North Atlantic. Radiometric age control is being explored by scientists as a means of predicting glacial movements in the Antarctic. Sediment cores have been found from the eastern continental shelf. These sediments predate the isotope stage 2 of the last glacial maximum.

Antarctica, Ice sheets, Icebergs, Glacial erosion

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