Urban geology

As I was walking to work on Monday morning, I was (I confess) excited to see road construction work progressing.

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Big digger! Want.

It’s spring, and that must mean construction season.

The construction itself is not what excites me, even though I do find big trucks more and more interesting, the older I get. (How come no one ever took me to look at big trucks when I was kid?? Oh yeah, I was a girl. Now I want to drive one!)

The exciting part is the rocks beneath. On my walk to work, I am passing over massive bedrock — the chilled magma from Earth’s interior that underlies the high points in Stockholm. I step over layers of glacial till, flood deposits from rivers and streams, human-made layers of cobblestones and asphalt, all disturbed by tree roots and pipes laid down by water and electricity and phone companies.

A nice slice through that by a digger, and voila! A little geological + human time, exposed in the middle of the road for me to stop and gawk at. Awesome.

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