Limitations of graded bedding: and alternative criteria of upward sequence in the rocks of the Southern Uplands

Abstract

Types of graded bedding in Ordovician and Silurian rocks of the Southern Uplands of Scotland are described and their reliability as criteria of upward sequence assessed. Other structures, including ripple marking and current bedding, scour-and-fill, and load-cast structures, are discussed and it is concluded that these are often more common and reliable than graded bedding.