[thinking]

The objects stuck the earth at a low angle, and in south easterly direction....something like skipping a stone over the water....

[RightWhale]

Maybe. But, that doesn’t necessarily result in elliptical holes. Weather erosion of the pits could do that if they are water-filled.

[muawiyah]

BTW, a tad earlier we had a whopper of a meteor strike over in the DelMarVa. Left compression ridges far inland. I live on top of one, on the Western shelf. You can trace this crater from New Jersey to Georgia.

During the Younger Dryas, however, we had a resumption of a near polar freeze/thaw cycle for just under a thousand years. There are all sorts of strange ice shaped ground features in this region ~