Today: #VolcanoThursday meets #StructuralGeology. Last year during #hedgewatch on #Iceland we found this #slickenline in #lava from the 1st 2023 #eruption at #Fagradalsfjall. The scratch originated when a block of solidified lava was pushed over softer lava
#Grindavik #volcano
....... Fig 3 #Slickenlines are impawtent if you find them on #faultplanes because they can tell you in which direction the #rocks moved🙀 This example is from #Crete

#geology #slickenside