Abstract
Sequence stratigraphy has been adapted at various temporal and spatial scales for application to the study of glacial depositional systems, recognizing specifically the sedimentological signatures of glacial advance and retreat cycles in basin infills not necessarily controlled entirely by global sea level change. Deepwater, glacimarine deposits reflect the sedimentary signatures of ice proximity, wherein a glacial cycle is recorded by proximal-distal-proximal sedimentation regimes within upper and lower sequence boundaries marked by glacial diamictons. Sequence stratigraphy models for glaciated shelves account for periodic ice advance and retreat as well as the relationships between glacioisostasy and glacioeustasy. The main controls on sequence stratigraphy in glacial settings are water level relative to the depositional surface (accommodation space) and the point of sediment injection (glacier snout). Allostratigraphy is a descriptive and non-genetic sequence stratigraphy, wherein mappable sedimentary bodies are separated by discontinuities and glacial systems tracts can be defined by the glacier advance-and-retreat cycle, more akin to event stratigraphies.
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