Geograph - photograph every grid square

 
The Glacial Boulder, which is a glacial erratic placed here in the 1950s, marks the southern limit of the northern ice sheet that carried the boulder from southern Scotland to Cannock Chase.
The boulder has been matched to a rock outcrop at Criffel in Dumfries & Galloway in the Southern Uplands of Scotland.

The boulder stands on the base of what was a reservoir tower that supplied water to steam locomotives.

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See also this photograph by Angella Streluk: SJ9818 : Glacial Boulder, Cannock Chase (2005).

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Sources and web sites/pages of interest:
mycountryside.org.uk: Link (Archive Link )
Walking Britain: Link
CannockChaseHistory.org.uk: Link (Archive Link )
Staffordshire County Council: Link (Archive Link ) (PDF)
Staffordshire RIGS Group: Link and Link (PDFs)

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Note: The Date Taken is the processing date printed on the slide and therefore the photograph could have been taken several weeks earlier.