Just tossing out that a couple of months back, the History Channel ran a piece on 'roids striking the Earth.
Eugene Shoemaker noticed on a satellite photo that an area of Germany looked liked it was hit by a big object. A
cathedral near the center of the "hit" was built of a mineral found in meteors.
No idea about the date of the impact.
Yup. I saw that some time back too.
The Ries Basin impact was about 15 million years ago, if memory serves.