Evolución de los sistemas de drenaje en la plataforma continental de la Tierra de Wilkes durante el Cenozoico y cambios en el régimen glaciar del casquete de hielo Antártico oriental
- J.J. González 1
- Carlota Escutia 1
- Francisco José Lobo Sánchez 1
- 1 Instituto Andaluz de Ciencias de la Tierra, CSIC-Universidad de Granada
ISSN: 1576-5172
Year of publication: 2008
Issue Title: VII Congreso Geológico de España
Issue: 10
Pages: 627-630
Type: Article
More publications in: Geotemas (Madrid)
Abstract
Unconformity WL-U3, which marks the onset of glaciation on the Wilkes Land continental shelf, is characterized widespread erosive channels. With time there is an evolution to localized channels with channel morphologies that become wider and shallower. The valley eroded during the Last Glacial Maximum is broad (25 km) and has a trapezoidal cross-section profile. We believe the variation in time in the spatial distribution and morphological character of the drainage systems in the Wilkes Land is related with changes in the East Antarctric Ice Sheet glacial regime: from a temperate wet-based ice sheet during the development of WL-U3 to a cold-based and persisten ice sheet during the Last Glacial Maximum.