Aluminous phyllosilicates promote exceptional nanoscale preservation of biogeochemical heterogeneities in Archaean siliciclastic microbial mats - Nature Communications Using a range of laboratory and synchrotron techniques, Hickman-Lewis et al. show that some of Earth’s earliest siliciclastic microbial mat fossils (2.9 Ga) unexpectedly preserve biogeochemical signat...

www.nature.com/articles/s41...
Using a range of lab and synchrotron techniques, authors show that some of Earth’s earliest siliciclastic #microbial mat #fossils (2.9 Ga) unexpectedly preserve biogeochem signatures in nanoscale domains of organic material. #palaeontology #Archaean #Precambrian

#FridayFold in #Archaean amphibolites seen on the west coast of the #IsleofLewis.
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Tiger stipe camouflage isn't really effective on the west coast of the #IsleofLewis👀
Compositional (rhythmic?) banding is preserved locally within an occurrence of #Lewisian "Older Basic Suite" meta-basics/ultrabasics.
#Archaean ⚒️🧪

#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.

The #Craton Enigma - Scientists Propose a New #Continental #Formation Theory
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tinyurl.com/4pypzb6x
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doi.org/10.1038/s415... 
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#GIS #spatial #mapping #geology #structuralgeology #cratons #planetary #evolution #platetectonics #earth #structure #weathering #erosion #water #Archaean #lithosphere