article_snippet: The smaller eastern crater is about 16 miles (26km) in diameter, while The smaller eastern crater is about 22 miles (36km).
article_snippet: the East Clearwater crater is about 16 miles (26km) in diameter, while the East Clearwater crater is about 22 miles (36km). 
article_snippet: Further evidence for the latest findings comes from the amount of chlorine in the two craters.
article_snippet: The rocks from the East crater have more chlorine than the West crater, suggesting more chlorine than the West crater formed on a coastline when water was still abundant in the area.