The Winona Formation (also called the Winona Sand or the Winona Greensand) is a sand geologic formation in Mississippi. It preserves fossils dating back to the Paleogene period.
The Winona Formation (also called the Winona Sand or the Winona Greensand) is a sand geologic formation in Mississippi. It preserves fossils dating back to the Paleogene period. (en)
The Winona Formation (also called the Winona Sand or the Winona Greensand) is a sand geologic formation in Mississippi. It preserves fossils dating back to the Paleogene period. (en)