Labels:text OCR: CALORIS BASIN THE CALORIS BASIN, at 1,300 km (800 Site of impact miles) across, is the largest impact basin to be discovered on Mercury. It is surrounded by concentric rings of mountains thrown up by an enormous impact. The floor of the basin has been largely filled with solidified lava, and is heavily marked by smaller, younger, craters. It was called "Caloris," from the Latin word for "heat," because on each alternate occasion that Mercury approaches Hills closest to the Sun, the basin happens SHOCK WAVES to point toward the Sun and is the The huge impact that formed the hottest place on the planet. Caloris Basin created hills on the opposite side of Mercury.
