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A glaciated rock is a rock that shows evidence of having been exposed to a
glacier A glacier (; ) is a persistent body of dense ice that is constantly moving under its own weight. A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. It acquires distinguishing features, such as ...
. Generally it has striations or deep scratches, caused more by the debris being carried by the glacier than by the ice itself. Glaciated rocks may also be erratics - that is, not belonging to the local rocks but having been transported there by the glacier. Where a present-day glacier is retreating, its former extent can be measured by distribution of the glaciated rocks. More significantly glaciated rocks in any area mean that it has been under ice at some stage. Thus they have produced evidence that
Saudi Arabia Saudi Arabia, officially the Kingdom of Saudi Arabia (KSA), is a country in Western Asia. It covers the bulk of the Arabian Peninsula, and has a land area of about , making it the List of Asian countries by area, fifth-largest country in Asia ...
was once covered by an ice sheet. Petrology {{Glaciology-stub