干旱区生态环境知识资源中心

Following a marine transgression which inundated the Truelove Lowland up to an elevation of 86 m by approximately 9 700 years BP, lake development was initiated by glacio-isostatic rebound which isolated marine lagoons behind a series of raised beaches. The ages and elevations of whalebones and driftwood contained in these beaches permit the reconstruction of the progressive emergence of the Lowland from the sea and the timing of lake isolation. Further details of the environmental changes experienced by the lakes and their catchments during the Holocene are recorded in the chemistry of the lake sediments.