3-624: Astrolabe Subglacial Basin is a subglacial basin to the south of the Adélie Coast and east of Porpoise Subglacial Highlands , trending north–south and containing the thickest ice — about 4,700 metres (15,400 ft) — measured in Antarctica . The basin was delineated by the SPRI - NSF - TUD airborne radio echo sounding program, 1967–79, and named after the Astrolabe ,
6-462: A syncline fold. They are geological depressions , the inverse of domes . Elongated structural basins are a type of geological trough . Some structural basins are sedimentary basins , aggregations of sediment that filled up a depression or accumulated in an area; others were formed by tectonic events long after the sedimentary layers were deposited. Basins may appear on a geologic map as roughly circular or elliptical, with concentric layers. Because
9-612: The flagship of the French Antarctic Expedition , 1837–40, under Captain Jules Dumont d'Urville . 70°S 136°E / 70°S 136°E / -70; 136 This Adélie Land location article is a stub . You can help Misplaced Pages by expanding it . Structural basin A structural basin is a large-scale structural formation of rock strata formed by tectonic warping ( folding ) of previously flat-lying strata into
#474525