Crater Lake in Oregon was produced when the summit of a volcano collapsed.
Explanation:
Crater Lake is located in the state of Oregon. It is the main geographical feature of the Crater Lake National Park and famous for its intense blue color and the transparency of its waters, being also the deepest lake in the country. The lake partially fills a volcanic boiler about 1,220 meters deep that was formed about 6,850 years ago by the sinking of the Mazama volcano.
The most detailed Roman mosaics use small stones to achieve an effect like brushstrokes. Especially in the eastern provinces of the Roman empire, artists “painted” with stone. Hope this helped :)
