Today some airport #geology before the internet must be turned off. It's an unspectacular but beautiful #granite. The white #minerals are #feldspar the grey ones are #quartz &the black ones #biotite a #mica #mineral.
Humans #PawForScale
#pavementgeology #urbangeology #hedgewatch

Interesting #boulders in a roughly stacked #seawall
The southern part of the spit separating #Plymouth Harbor from Plymouth Bay has a seawall along the outer shore, above Plymouth #LongBeach. Without knowing where they came from, interpreting the boulders is sketchy. BUT nice coarse crystals in intrusions into #felsic rocks, including big #quartz chunks (top right photo) and blades of #biotite (bottom right).
#Massachusetts #igneous #geology #intrusion #pegmatite #NewEngland #dike #rock #beach