Near a stream by the Red Trail at the High Mountain Park Preserve, I saw several rocks with small holes in them.
Anyone know what's going on?
William Paterson University Geology Professor Martin Becker writes:
The rock does not appear to be a vesicular or amygdaloidal basalt.
It is also more rounded and not angular as one would expect from the local Preakness Basalt Formation.
The surface color is not a good match either for weathered basalt.
I think it is a glacial erratic and piece of the Oriskany Sandstone of New York State and what you are looking at are one of two things:
a) non-quartz minerals that have chemically and physically eroded away leaving behind the “holes”
b) remains of ichnofossils in the form of “holes” or “tubes.”
Prof. Becker asked me to do a test on the rock. Will try to do so... (Thanks, Prof. Becker!)