Virtual Museum ID: 19-LDM15
A thunder egg is a nodule-like rock similar to a filled geode, that forms within rhyolitic volcanic ash layers. Thunder eggs form in the lava from water percolating through porous rock that is carrying sillica in solution. Colour variances come from the different minerals found in the soil/rock that the water moved through.
Usually composed of quartz, agate, opal, and/or visibly crystalline quartz. It has been proposed that thunder eggs are the interior of cavities,/vesicles/gas bubbles in rhyolitic lava flows.
The information listed below relates to the current holding location or collection that the sample is from, and whether the item is viewable at that location or is part of a private collection. Coordinates are given as guides, and we remind you that collecting specimens from these locations is not allowed. Caution is advised visiting such sites and Below BC assumes no responsibility for any injuries or trespassing charges that may occur as a result of the viewer entering these sites.
Original Collection:Lakes District Museum (LDM)
Virtual Museum ID:19-LDM15
Date Added to VM:2019-08-23
Sample Origin:Merrit, British Columbia
Datum:10 (NAD 83)
Primary Features:Thunder egg
Primary Mineral Formula:-
Advanced Geological Information
The following section provides geological data relating to the specimen or the site it was collected from, when available. Information has been obtained from various sources including private and government datasets but may not be up to date. Any geological time periods or ages listed often relate to the primary geology of the area, and may not be the actual date of an event such as mineral formation.