Complex sentence: The rock itself is about 10 feet (3 meters) long, 7.5 feet (2.3 meters) wide, 5 feet (1.6 meters) tall and is buried at least 6.5 feet (2 meters) below the ground.
Split into simpler sentences: The rock itself is about 10 feet (3 meters) long, 7.5 feet (2.3 meters) wide, and 5 feet (1.6 meters) tall. It is buried at least 6.5 feet (2 meters) below the ground.