[Show slideshow] 31 May 2025 | 10.30–1pm | £2.50 per person For the end of May Bank Holiday weekend, Rockwatch is off to Thorndon Country Park in Essex — and we’d love you to come with us! Join local pebbles lovers Ian and Ros Mercer as we explore the fascinating Pebble Walk Trail, uncovering ancient clues about Earth’s climate and landscapes. We’ll visit the 80-million-year-old Ice Age Pebble Wall and discover a variety of unique pebbles — from flat pebbles and red flint to curious Pot-lid pebbles. Each pebble tells a story, shaped over millennia by geological processes, and this field trip will help...