Salisbury Crags
by Yvonne Johnstone
Title
Salisbury Crags
Artist
Yvonne Johnstone
Medium
Photograph - Digitally Enhanced Photograph
Description
City of Edinburgh, Scotland.
Situated in Holyrood Park, the Crags are the glaciated remains of a Carboniferous sill which formed in a shallow sea 340 million years ago.
The hard Dolerite which forms the crags was quarried for use as street cobble stones from the mid 17th century on the authority of the Earls of Haddington who were hereditary keepers of Holyrood Park.
James Hutton, the father of modern geology, first made his discovery at Salisbury Crags that igneous and sedimentary rocks were made at different times and the earth was much older than previously thought. His ideas influenced Darwin. Hutton's Section is a geological feature that shows igneous rock (Dolerite) overlaying and intertwining with sedimentary rock.
Uploaded
February 20th, 2021
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