Tvären Explained

Tvären
Map:	Sweden
Confidence:	Confirmed
Age:	455 Ma
Country:	Sweden
Municipality:	Studsvik

Tvären is a circular bay close to Studsvik, Sweden.

Within the bay is an ancient buried impact crater about in diameter. It was first identified using reflection seismology. The crater is estimated to be about 455 million years old (Late Ordovician).^{[1] [2]}

Asteroid 7771 Tvären is named after the bay.

References

58.7667°N 42°W

Notes and References

1. Tvären. tvaren. 2009-08-20.
2. Flodén. Tom. Tunander. Pål. Wickman. Frans E.. 1986. The Tvären Bay structure, an astrobleme in southeastern Sweden. Geologiska Föreningen i Stockholm Förhandlingar. 108. 3. 225–234 . 10.1080/11035898609454687.