1. A banded iron formation or metamorphic rock composed of alternating layers of jasper and iron oxide minerals, typically found in Precambrian geological formations.
Usage: geology; technical

Examples

• The jaspilite deposits in Western Australia are among the world's richest sources of iron ore.
• Geologists identified jaspilite layers in the rock samples collected from the ancient shield.
• The distinctive red and gray banding of jaspilite makes it easily recognizable in the field.
• Jaspilite formations provide important evidence of Earth's early atmospheric conditions.
• Mining operations often target jaspilite beds due to their high iron content.