The depression is interpreted as a meteorite impact crater formed about 14.3 million14.5 million years ago in the Miocene.[1][2] The crater is most commonly referred to simply as the Ries or Ries crater. The original crater rim had an estimated diameter of 24 kilometers (15 mi). The present floor of the depression is about 100 to 150 m (330 to 490 ft) below the eroded remains of the rim.
Truly interesting!
This reminds me of certain dark stones in NYC which have these sort of sparkles. Like subway steps. Just wondering if it is from the same impact effect.