frozen Volcanic conduit in Winooski/Colchester, VT:
This volcanic 'pipe' or 'sheet' (at least that's what
*I* think it is!) goes through ancient uplifted sedimentary limestones.
This happens to be about the highest point in the Winooski, VT area . .
. . if you click for a larger image you'll notice that the prevailing
layered rocks are not reflected in the denser, darker rock. I think the
"rusty" color comes from iron in the volcanic rock.
This pic shows the layered, sedimentary nature, and southward 'dip', of