Landless2029@lemmy.world to What is this thing?@lemmy.worldEnglish · edit-26 hours ago[Challenge-Solved] glass egg thinglemmy.worldimagemessage-square25fedilinkarrow-up158arrow-down13
arrow-up155arrow-down1image[Challenge-Solved] glass egg thinglemmy.worldLandless2029@lemmy.world to What is this thing?@lemmy.worldEnglish · edit-26 hours agomessage-square25fedilink
minus-squareklugerama@lemmy.worldlinkfedilinkEnglisharrow-up31·11 hours agoNot glass, but hardened resin. Used to track littoral currents and drift. Has metal so it can be found later with a metal detector.
minus-squareoce 🐆linkfedilinkEnglisharrow-up12·9 hours agoA tracer pebble, interesting. But they seem to be rather made of the same pebble they are supposed to trace. https://southerncoastalgroup-scopac.org.uk/tracer-pebble-studies/
![[Challenge-Solved] glass egg thing](https://lemmy.world/pictrs/image/54d923bf-4a32-46aa-8ece-9ac9bf5e614e.webp){kind=link}
Not glass, but hardened resin. Used to track littoral currents and drift. Has metal so it can be found later with a metal detector.
A tracer pebble, interesting. But they seem to be rather made of the same pebble they are supposed to trace. https://southerncoastalgroup-scopac.org.uk/tracer-pebble-studies/
Fascinating!
Winner. 2 hours!