Visiting the site during the growing season is quite pointless as it lies on cultivated land that is under a dense cover most of the time between March and September, and lies under snow or is frozen rock solid during most of the winter. In the name of science, we took one typical piece of quartzite from the site, to make a thin section. As you can see from the picture on the left, it consists mostly of quartz and is therefore not terribly interesting in plane polarized light. The photo on the right shows the same thinny under cross-polarized light, bringing out the quartz grains quite nicely. There is remarkably little cement between the grains for such a dense and knappable quartzite.
Most grains have subgrains or undulose extinction.
Well sorted, poorly rounded. Hopefully we'll be able to bring you more information in one of the future updates.