I'll be mixing in photos from three different trips to Quartzville over the last couple years for this portion of the series; this one is from the middle of June, and shows a bit of vesicular basalt. The gas bubbles are partly filled with (mostly) stilbite. Note that I can't make that identification from this photo; the resolution isn't good enough. You need to get up close and personal with a hand lens to make that call. With the exception of natrolite, that's generally the case at this outcrop. Natrolite comes in larger pieces, has a very distinctive fabric of radiating crystal fibers, and can often be identified from several yards away.
Just plain-ole basalt. Dull, right? Well, yes, it can get tedious in a state so well endowed with that rock, but it can be interesting if there's something more than just plain-ole black ugly rock. In this case, the white splotches down lower are mostly Queen Anne's Lace. But the speckles up higher are calcite and zeolites, and those are pretty and interesting. The best way to look for them here is by splitting the cobbles and boulders that have fallen off the face and into the ditch/berm. The road is windy here, and traffic is sporadic, and often moving faster than is wise. Keep your ears pealed; you'll hear vehicles before you see them. There's plenty of off-pavement space, so give them some room.
Okay, it's a pretty lousy photo, and the shadows from the fence when I was out taking pictures don't help at all, but here's the same stretch of sidewalk I featured five years (!) and a month ago. I've annotated just two of the more distinctive pebbles, but you can see the full deal here. That photo seems to have a big impact in presentations I've done over the past few years. In a field trip a month ago, participants found quite a few nice agates at our first stop, and were somewhat distracted from the geology we wanted to point out. No great loss, though. If they take away the importance of geological materials in construction, I can concede distraction from other rocks.
Interzone's sundial is marked from nine AM to five PM, and oddly, "Night" is marked, too. How does that work? When the sun goes down, the street light comes on, and casts a shadow along the marked path. We're on a spnning ball of rock, which means the sun appears to move through the sky, but the lamp spins with it, so it appears fixed.