Mar 2020. Last trip before COVID lockdown to an old spar mine. Blast marks, fossils and cave pearls with some artefacts #mine #mineexplore #cave #caving #speleo #peakdistrict #derbyshire #spar #fossils #cavepearls #blastmark

Mar 2020. Details from a crumbling fluorspar mine, with some galena in parts. #mine #mineexplore #cave #caving #speleo #galena #fluorspar #cavepearls #fungus #stickythreads #winze

Dating an ancient spring tunnel using archaeological artefacts functioning as nuclei of cave pearls
https://buff.ly/4fSkeWz
#OpenAccess #EarlyView #C14dating #ArchaeomagneticDating #CavePearls #geoarchaeology #StableIsotopes XPS