#laxfordian — Public Fediverse posts

A #FridayFold from the west coast of the #IsleofLewis.

The dark mafic #OuterHebrides dykes were intruded into the #Lewisian gneiss. The original cross cutting relationship has been brought into near concordance during subsequent #Laxfordian deformation which also generated these folds.

Attenuation of the limbs in these folds has left some of the fold hinges essentially floating.
#Laxfordian folding on the north west coast of the #IsleofLewis

#TectonicTuesday #Geology #Lewisian #Folding

#FridayFold seen in a new road cutting near Stornoway.

#Archaean Lewisian gneiss is cut by mafic #OuterHebrides dyke. Both are then folded during the #Laxfordian.

Cross cutting of the gneissic foliation can be seen in the core of the fold, whilst the limbs are concordant.

Another hard day in the office😎 looking for a #FridayFold

The #Lewisian gneisses on the beach at Port Nis (Port of Ness) have been folded during the #Laxfordian.
#IsleofLewis

Fun couple of days exploring the local #Lewisian geology with
@early_earth_tim

Firstly the #Archean (approx. 2.8 billion years old) ultrabasic intrusions at Maaruig (Maraig).

Then 3D outcrop mapping #Laxfordian folds in the Ness assemblage supracrustals at Eoropaidh (Eoropie).

Great day out yesterday with
@frankrennie
visiting west and central #IsleofLewis with a distinctively igneous theme.
#Laxfordian granite at Dalbeg.
#Tertiary dolerite dyke at Dalmore.
#Scouriedyke (suite) ultabasics at Cleitichean Beag