20250417_124628 Image 1 of 10 Rockwatchers with their competition entries Our Rockwatch pebble detectives were out in full force this Easter break, exploring a hidden geological gem in North London – the ancient and mysterious Harrow Weald Common! Rockwatchers set off to uncover the secrets of the Stanmore Gravel – a fascinating layer of pebbles that survived the Ice Ages. This special area, right next to a Geological Site of Special Scientific Interest, was the perfect spot to learn all about these ancient stony survivors. We discovered an amazing variety of pebbles – from rusty-coloured ones and...