Despite falling in the middle of a spell of humid and stormy weather, the Fourth of July this year dawned with almost perfect weather, and I took advantage of it by heading to Blue Mound State Park for the day.
That’s from the top of one of the observation towers helpfully provided, since in summertime the view would otherwise be confined to what you could see through the trees. The tower is not incredibly high, all things considered – just enough to be over the treetops – but it was an epic enough climb for me, given my lack of head for heights, that getting to the top without a panic attack felt like a considerable achievement. The view (as you can see) really was worth it.
When I reached the ground again, I was met by a bedraggled but still striking Eastern tiger swallowtail (Papilio glaucus):
I often see butterflies gamely continuing on with very torn-up wings, and I’m sure it’s anthropomorphizing but I always find it moving. Particularly those last few tatters of iridescent blue that you can see in the tail there.
The Flintrock Trail runs down from the Tower and around through the northwest section of the park; as the name suggests there are many boulders and outcroppings of chert along the route. Apart from being visually striking, the masses of chert on West Blue Mound are a strong going explanation for why it has stayed a high point:
Blue Mound State Park, located in the state of Wisconsin (USA), is host to a topographic anomaly known as Blue Mound. This mound is the western of the two mounds that make up the park, and it marks the highest elevation in southern Wisconsin. Unlike its eastern sibling, Blue Mound possesses an unusual chert cap that may have protected it from erosion, thus preserving its stratigraphic integrity. Although Blue Mound’s unique chert armor was noted in 1927 by the Wisconsin Geological and Natural History Survey, no published work has satisfactorily explained its origin.
The cooperation of the weather with the holiday really was striking; the day before and day after were both dismal. The bison statues next to the bike path in the Midvale Heights neighbourhood of southwest Madison were decorated for the occasion: