Physiography of the Prince Olav and the Prince Harald Coasts, East Antarctica (Earth Sciences)
スポンサーリンク
概要
- 論文の詳細を見る
The author describes the physiography of the Prince Olav and the Prince Harald Coasts and discusses the geomorphic development of the coastal and the inland icefree areas of the region based mainly on field surveys arid air-photograph interpretation. The Yamato Mountains are situated inland about 300 km away from the coast and consist of seven small massifs and some 20 nunataks with maximum elevation of 2490 m above sea level. They were once covered completely with the former ice sheet. The fall of the ice level revealed the glaciated topography including at least two cirques which had been formed by mountain glaciation prior to inundation of the former ice sheet. The trace of erosion by the wet-based ice sheet is found on a part of the bedrock. In the retreat of the ice from the highest to the present levels, three stages can be recognized ; the Yamato, the Fukushima, and the Meteorite Glacial Stages for the maximum, intermediate, and near past to present standstills of the ice sheet. During the ice retreat outlet glaciers and detached ice masses fed partly by drifted snow modified the topography of the presently ice-free areas. In the coastal region, the ice sheet retreated from the edge of the continental shelf prior to 30000 years before, leaving the glaciated ice-free areas on the present coast. Areal scouring of the former ice sheet produced the undulating surfaces with subsequent features controlled by geologic structures on the preglacially existed subdued topography. Selective linear erosion also cut the surface to produce precipitous cliffs and U-shaped valleys both in the ice-free areas and on the sea floor. Crooked glacial grooves and related minor topography suggest the erosion by the wet-based former ice sheet. Raised marine features after glaciation and radiocarbon dates give the information of crustal movement in time sequence.
- 国立極地研究所の論文
著者
関連論文
- Some Information on Topographic Features and the Characteristics of the Ice Sheet around the Yamato Mountains
- A note on the ice sheet fluctuations and problems of Cenozoic studies in Antarctica
- Estimation of the ice thickness of cirque glaciers by the gravimetric survey at the Yamato Mountains, East Antarctica
- GEOMORPHIC ELEMENTS IN THE DRY VALLEYS REGION, ANTARCTICA : WITH REFERENCE TO GEOMORPHOLOGICAL MAPPING PROGRAM
- A PRELIMINARY SURVEY BY A SEISMIC PROFILING ACROSS THE GUNNERUS RIDGE OFF THE RIISER-LARSEN PENINSULA, ANTARCTICA
- Foreword
- Landform of Mt. Riiser-Larsen, Amundsen Bay, Enderby Land: Results of a preliminary survey
- Submarine topography of Lutzow-Holm Bay, Antarctica
- Sea ice condition around Syowa Station, Lutzow-Holm Bay, in 1981 (abstract)
- Search for Yamato meteorites in December 1981
- Foreword
- DIGITAL DATA ACQUISITION SYSTEM OF THE JAPANESE ANTARCTIC RESEARCH AIRCRAFT PILATUS PORTER PC-6
- Geomorphic nature of some unconsolidated deposits in the Langhovde and Skarvsnes areas, Soya Coast, East Antarctica
- Physiography of the Prince Olav and the Prince Harald Coasts, East Antarctica (Earth Sciences)
- Physiography of the Prince Olav and the Prince Harald Coasts, East Antarctica
- RESULTS OF SUPPLEMENTARY GLACIO-GEOMORPHOLOGICAL OBSERVATIONS IN ICE-FREE AREAS ON THE SOYA COAST
- Some Consideration on Elevated Coastal Features and Their Dates around Syowa Station, Antarctica
- Holocene raised beaches in the Lutzow-Holm Bay region, East Antarctica