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Norber Erratics
The Norber Erratics on Norber near Austwick in the Yorkshire Dales, North Yorkshire.
The boulders of dark Silurian greywacke (sandstone) are classic examples of erratic boulders. These huge rocks were carried uphill from Crummack Dale by a mighty glacier during the last Ice Age, and dropped onto the limestone pavement as the ice melted. Since then acid rain has eroded the surrounding limestone, leaving some boulders perched on limestone pedestals.
Created: August 13, 2017
Author: Joan Martin
Copyright © Joan Martin (PHOTO NORTH). All Rights Reserved.
Photograph size: 19.4 Mpixels (55.6 MB uncompressed) - 5400x3600 pixels (18x12 in / 45.7x30.5 cm at 300 ppi)
Photograph keywords: Austwick, erratic boulder, greywacke, limestone, Norber, Norber Erratic, Ribblesdale, Silurian
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