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| Lochnagar Crater |
In preparation for the assault on La Boiselle two large mines had been laid under the salient formed by the trenches around La Boiselle. To the north was Y Sap, 40,000 pounds, and to the south, Lochnagar, 60,000 pounds.
The mines were detonated 2 minutes before zero hour, the crater left by the Lochnagar explosion remaining to this day.
http://www.flashearth.com/?lat=50.015601&lon=2.697328&z=15.1&r=0&src=msl
http://www.flashearth.com/?lat=50.015601&lon=2.697328&z=15.1&r=0&src=msl
Friends of Lochnagar Crater